JP2003281102A - Graph display controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a graph display controller capable of supporting function grasp of a user and achieving screen display which is easy to looking at. <P>SOLUTION: A display screen 2 is divided into right and left two parts. A graph is displayed on every split screen respectively. The individual graph displayed on every split screen is interlocked respectively and tracked, function display is performed, and the graph is stored once and is displayed again. The relation between mathematical formula and graph is explained and displayed by displaying the mathematical formula on one split screen and displaying the graph on the other split screen. A graph can be displayed by splitting the display screen 2 into three or more screen. A trace value can be displayed with tracking. A display state of the entire display screen 2 and the split screen can be switched. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graph display control device for displaying a graph on at least one display screen of a display section having a plurality of display screens.

[0002]

2. Description of the Related Art In recent years, many graph scientific calculators having a graph creating and displaying function have been developed. This graph scientific calculator has a memory in which various function calculation programs and graph drawing programs are stored, and displays a mathematical expression input by the user and creates and displays a graph based on the input mathematical expression. It is a thing. That is, it has a calculation mode for performing four arithmetic operations and a special function operation, and a graph mode for displaying a graph.

[0003]

Such a graph scientific calculator specialized in processing such as function calculation and graph display and having an improved usability is widely used in the field of education and technical calculation of engineers. ing. Especially in the field of education, the functions of the graph scientific calculator, that is, the functions of displaying mathematical expressions and their graphs, function operations such as integration and differentiation and their graphing, and displaying the characteristics of graphs, are important for the meaning of various calculations. It should be easy to understand the function structure,
There is a tendency to actively adopt graph scientific calculators.

By the way, in the conventional graph scientific calculator, as a display method in the graph mode, the display screen is divided into two left and right.
In general, it is divided into two parts, one of the divided screens displays the mathematical formula, and the other divided screen displays the graph. In the field of education, there are cases where learning / education methods such as comparing two or more graphs and understanding the properties of each graph and the structure of the function are adopted. In order to display the graph, there was no choice but to display it on the same screen.

In a conventional graph scientific calculator, characteristics such as an extreme value, an inflection point, a solution of an equation are displayed on a graph,
Some have a function of displaying a pointer to trace on a graph. However, when a plurality of graphs are overlaid and displayed on the same screen, there is a fear that these function displays may be complicated.

Further, in the conventional graph scientific calculator, the emphasis is placed on displaying the shape of a graph for one mathematical expression, and the differences and similarities between a plurality of graphs can be clearly expressed or one graph can be expressed. There were few cases where the structure was displayed simultaneously from multiple viewpoints.

SUMMARY OF THE INVENTION An object of the present invention is to provide a graph display control device to assist a user in grasping a function and to realize a more easy-to-see screen display.

[0008]

According to a first aspect of the present invention, a graph display control for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen. In the device (for example, the graph display control device 1 according to the first embodiment), a graph display unit (for example, FIG. 2) for displaying a graph on each of the first display screen and the second display screen. CPU 1
0; S3) of the trace processing 1 in FIG. 5, the trace displayed on the first display screen, and the graph displayed on the second display screen are traced in conjunction with each other. (For example, the CPU 10 of FIG. 2; S4 to S15 of the trace processing 1 of FIG. 5).

Here, the first display screen and the second display screen may be independent display devices, or one display screen may be divided.

According to the invention described in claim 1,
The graph is displayed on each of the display screen and the second display screen. Then, the graph displayed on the first display screen and the graph displayed on the second display screen are traced in association with each other. In this way, by tracing in conjunction with each graph displayed on different display screens,
The positional relationship between the graphs can be shown more clearly.

The invention described in claim 2 is the same as claim 1.
In the graph display control device described in (1) (for example, the graph display control device 1 according to the second embodiment), the graph that the graph display means can display includes a statistical graph. .

According to the invention described in claim 2, the first
A statistical graph can be displayed on the second display screen. Therefore, the user can trace the statistical graph displayed on each display screen, and can surely grasp the size relationship and positional relationship of each list data.

The invention described in claim 3 is the same as claim 1
Alternatively, in the graph display control device described in the paragraph 2, the trace unit simultaneously displays the trace value of each graph (for example, the coordinates of the trace pointer in the embodiment).

According to the third aspect of the present invention, the trace values at the time of executing the trace are sequentially displayed simultaneously.
Therefore, not only the position on the graph can be visually indicated by the trace pointer or the like, but also more concretely indicated by a numerical value. Therefore, the user can grasp the positional relationship between the graphs more accurately.

The invention described in claim 4 is the same as that of claim 1.
Alternatively, in the graph display control device according to the second aspect (for example, the graph display control device 1 according to the third embodiment), the graph display means may display the first display screen with respect to the second display screen. It is characterized by enlarging or reducing a part of the graph displayed in FIG.

According to the fourth aspect of the invention, a part of the graph is enlarged or reduced and displayed simultaneously. A conventional graph scientific calculator is often of a type in which a user designates a domain and creates and displays a graph within the designated range. In such a graph scientific calculator, the size of the graph displayed on the screen may be too large or too small depending on how the domain is specified, and the user may not be able to grasp the characteristic portion of the graph. However, according to the present invention, it is possible to display the enlarged view or the reduced view of the graph in the specified range while the graph is displayed.
The user can grasp the structure of graphs and mathematical formulas more quickly.

In the graph display control device according to claim 4 (for example, the graph display control device 1 according to the third embodiment), the first display Of the trace values of the screen and the graph displayed on the second display screen, a highly accurate trace value may be displayed. As described above, by displaying the trace value having a high accuracy during the trace execution, the user can grasp a more detailed positional relationship.

The invention according to claim 6 is the same as claim 1.
Alternatively, in the graph display control device according to the second aspect (for example, the graph display control device 1 according to the ninth embodiment), the graph display means may display the first display screen and the second display screen. At least a first graph and a second graph are displayed simultaneously, and the tracing means interlocks with the first graph on the first display screen and the second graph on the second display screen. And then trace.

According to the sixth aspect of the present invention, at least two graphs A and B are displayed on each of the two display screens. Graph A is traced on one display screen and graph B is traced on the other display screen in association with each other. In other words, on one display screen, only the graph A of the displayed graphs A and B is traced, and on the other display screen, only the graph B of the displayed graphs A and B is traced. .
Therefore, it is possible to prevent the individual pointers tracing on each graph from overlapping and making it difficult to see, and it is possible to reliably indicate the positional relationship of each graph.

The invention described in claim 7 is the same as claim 1.
Alternatively, the graph display control device described in 2 (for example, the 16th
In the graph display control device 1) shown in the embodiment of
Image data of graphs displayed on the first display screen and the second display screen by the graph display means,
Trace data trace-executed by the trace means (for example, trace information 150a and 150 in FIG. 49).
b) and a storage unit (for example, the CPU 1 of FIG. 2)
0; S255) of the trace processing 11 of FIG. 51), and the image data stored by the storage means is read out to display a graph on each of the first display screen and the second display screen, and trace data is displayed. Redisplay means for reading and tracing (for example, CPU 1 in FIG. 2)
0; S256 to S269 of the trace processing 11 of FIG. 51)
And are provided.

According to the invention of claim 7, when the image data of the created graph is stored, the trace data for executing the trace is also stored. Therefore, the trace can be executed even for the graph once stored and redisplayed. Therefore, the user can save the trouble of inputting the mathematical expression again when redisplaying the graph that has been displayed and canceled. In addition, since the trace data is also stored together, it is possible to quickly start the trace without repeating coordinate calculation in the trace.

The invention described in claim 8 is the invention according to claim 7.
In the graph display control device described in (1) (for example, the graph display control device 1 shown in the seventeenth embodiment), the redisplay means displays the graphs being displayed on the first display screen and the second display screen. Further, a graph based on the image data stored by the storage means is displayed in an overlapping manner.

According to the eighth aspect of the present invention, the image data of a plurality of stored graphs are sequentially read out and the respective graphs are displayed in an overlapping manner. Therefore, the user can not only grasp the positional relationship of a plurality of graphs at one time, but also can cancel the display of each graph and display it again when the display screen becomes complicated. It can be done easily and quickly.

According to the ninth aspect of the present invention, in the graph display control apparatus according to the eighth aspect, the re-displaying unit displays a plurality of overlapping images when performing tracing based on the trace data. It is also possible to display trace values for each of the graphs. By displaying the trace value in this way, it becomes possible to more accurately indicate the positional relationship between the graphs.

Further, the invention according to claim 10 is a graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen (for example, In the graph display control device 1) in the sixth embodiment, a graph display means (for example, a diagram) for displaying a graph of a two-dimensional coordinate system on each of the first display screen and the second display screen. 2 CP
U10; S82 of trace processing 6 in FIG. 20), tracing the graph displayed on the first display screen along the first axis direction, and displaying the graph displayed on the second display screen on the second axis. Trace means for tracing along the direction (for example, the CPU 10 of FIG. 2; S84 of the trace process of FIG. 20)
Up to S100).

According to the tenth aspect of the present invention, the graph displayed on one display screen is traced along one coordinate axis, and the graph displayed on the other display screen is traced. Trace along the coordinate axes of. Therefore, the user can consider and understand the graph displayed on each display screen from different viewpoints.

Further, the invention according to claim 11 is a graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen (for example, In the graph display control device 1) shown in the fifth embodiment, a graph display means for displaying a plurality of graphs on the first display screen (for example,
CPU2 of FIG. 18; S62 of trace processing 5 of FIG. 18)
And means for tracing the individual graphs displayed on the first display screen along the coordinate axes of 1 and displaying the trace values of the individual graphs on the second display screen as a table (for example, CPU 10 in FIG. 2). Trace processing 5 in FIG.
S70), and.

According to the invention as set forth in claim 11, a plurality of graphs are displayed on one display screen, and each graph is traced, and the trace value of each graph is displayed on the other display screen in a table format. To display. Some conventional graph scientific calculators display trace values near the graph. However, when the number of graphs to be traced increases, the display of the trace values may become complicated. However, it is possible to display the graph more clearly by displaying the trace value on another display screen as in the invention described in claim 11. In addition, by displaying the trace values in a table format, it becomes easier for the user to compare the positional relationship between the graphs.

The invention according to claim 12 is a graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen (for example, In the graph display control device 1) shown in the twelfth embodiment, graph display means (for example, CPU 10 in FIG. 2) for displaying graphs on the first display screen and the second display screen, respectively. FIG. 39
Trace processing 8 (S172) and trace means for tracing the graph displayed on the first display screen (for example, CPU 10 in FIG. 2; S1 in trace processing 8 in FIG. 39).
80 to S185), input means for the user to specify the position on the second display screen (for example, the input pen 4 in FIG. 1), and a pointer is displayed at the position specified by the input means. Means (eg, CPU 10 of FIG. 2; FIG. 39)
(S177 to S179) of the trace processing 8).

According to the twelfth aspect of the present invention, on the graph displayed on one display screen, the graph is sequentially traced, and on the graph displayed on the other display screen,
The pointer is displayed at the position designated by the input means. Therefore, the position on the graph desired by the user is
Even when the trace pointer is currently far from the displayed position, the position of the pointer can be quickly changed and moved to a desired position.

According to a thirteenth aspect of the present invention, in the graph display control device according to any one of the first to twelfth aspects (for example, the graph display control device 1 shown in the thirteenth embodiment), the display is performed. It is characterized by further comprising screen layout changing means for changing the layout configuration of the first display screen of the unit and the second display screen.

According to the thirteenth aspect of the invention, the arrangement of the first display screen and the second display screen can be changed at any time. Therefore, the user can change the layout configuration of the display screen according to the shape of the graph displayed on the display screen and view the graph in a better form.

Further, the invention according to claim 14 is a graph display control device for displaying a graph on at least one display screen among display parts having at least three display screens (for example, in the fourth embodiment. In the graph display control device 1) shown, generating means (for example, in FIG. 2) that converts a graph including three variables into a two-dimensional coordinate system having two variables included in the graph as coordinate axes. CPU10: S40 to S of trace processing 4 in FIG.
45) and means for displaying the two-dimensional graph generated by the generating means on different display screens for each combination of the variables (for example, CPU 10 in FIG. 2; FIG. 15).
Trace processing 4 (S45) and trace means for tracing the two-dimensional graphs by interlocking with each other (for example, CPU 10 in FIG. 2; S in trace processing 4 in FIG. 15).
46 to S55).

According to the invention of claim 14, 3
A graph composed of variables is converted into a two-dimensional coordinate system and displayed. In addition, the graph converted into each two-dimensional coordinate system is displayed at the same time and traced in conjunction with each other. Therefore, the user can better understand the structure of the graph consisting of three variables by comparing the graph and the trace displayed on each display screen.

Further, the invention according to claim 15 is a graph display control device for displaying a graph on at least one display screen of a display section having n display screens (for example, in a fourteenth embodiment). Graph display controller 1)
A means for displaying a graph on each of the n display screens (for example, the CPU 10 of FIG. 2; S210 to S214 of the trace processing 10 of FIG. 44), and the graph displayed on the n display screens. And tracing means (for example, the CPU 10 of FIG. 2; S215 to S221 of the trace processing 10 of FIG. 44) for interlocking with each other.

According to the fifteenth aspect of the present invention, the graphs are displayed on a plurality of display screens and the graphs are interlocked with each other to be traced. Therefore, for example, one graph can be displayed on different display screens so as not to intersect with another graph. Therefore, the user can grasp the shape of each graph without being confused with other graphs.

The invention according to claim 16 is a graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen (for example, In the graph display control device 1) shown in the seventh embodiment, a display unit that displays a mathematical formula on the first display screen and a graph based on the mathematical formula on the second display screen (for example, FIG. 2). CPU 10; FIG.
4) S103) of the function explanation process, and in response to an external input, a part of the mathematical formula displayed on the first display screen is highlighted and the graph displayed on the second display screen is displayed. And means for performing a display corresponding to the reverse display (for example, the CPU 10 in FIG. 2; S104 to S108 in the function explanation processing in FIG. 24).

Here, a part of the mathematical expression includes, for example, a coefficient, a variable, a term, etc. in the mathematical expression.

According to the sixteenth aspect of the present invention, the mathematical formula is displayed on one display screen, and the graph of the mathematical formula relating to the other display screen is displayed. And in response to external input,
Highlight a part of the displayed formula. Further, the displayed graph is displayed corresponding to the reverse display. Therefore, the user can compare the structure of the mathematical expression and the correspondence relationship with the graph, and thus can better understand the mathematical expression and the graph.

The invention according to claim 17 is a graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen (for example, In the graph display control device 1) shown in the eighth embodiment, means for displaying a mathematical formula on the first display screen and displaying a graph based on the mathematical formula on the second display screen (for example, in FIG. 2). CPU10; S112 of the function operation switching process of FIG. 28, and an operation means that determines the type of operation in response to an external input and applies the determined operation to the mathematical expression (for example, CPU10 of FIG. 2; function of FIG. 28). (S116 / S119 / S122) of the calculation switching process, a generation unit that generates a graph based on the calculation result by the calculation unit, and a calculation symbol corresponding to the calculation determined by the calculation unit. Together subjected to the formula displayed on the first display means, means for displaying the graph generated by the generating means to the second display means (for example, in FIG. 2 C
PU10; S117 and S1 of the function operation switching process of FIG.
20.S123).

According to the seventeenth aspect of the present invention, the mathematical formula is displayed on one display screen, and the graph based on the mathematical formula is displayed on the other display screen. Then, the specified operation symbol is displayed for the displayed mathematical expression, and the graph as the operation result is displayed on the other display screen. Therefore, the user can understand each operation symbol by associating the operation result with the operation result.

The invention according to claim 18 is a graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen (for example, In the graph display control device 1) shown in the tenth embodiment, a graph display means for displaying the same graph on the first display screen and the second display screen (for example, CPU 10 in FIG. 2; FIG. 33). 33), and function display means (for example, CPU 10 in FIG. 2; FIG. 33 in FIG. 33) for displaying different functions for the graph on the first display screen and the second display screen. S153 to S15 of the explanation process 1
8) and are provided.

Here, the function display includes, for example, display of extreme values, inflection points, and singular points in mathematical expressions, display of solution of equations, display of y-intercepts and contact points / intersection points of a plurality of graphs.
It is meant to include indicating features in one or more graphs.

According to the eighteenth aspect of the present invention, the same graph is displayed on the first display screen and the second display screen, respectively, and different function display is performed for each display screen. Normally, when a plurality of function displays are executed on one screen, the display screen may be complicated and the graph may be difficult to see. However, according to the invention of claim 18, the display screen is complicated. Instead, it is possible to display a plurality of functions at the same time. In addition, the user can save the trouble of repeatedly inputting the mathematical expression for analyzing the graph.

The invention according to claim 19 is a graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen (for example, In the graph display control device 1) shown in the eleventh embodiment, the first display screen has a first
Graph display means for displaying a graph and displaying a second graph on the second display screen (for example, CPU 10 in FIG. 2; S162 in the explanation process 2 in FIG. 36), the first display screen and the second display screen. Function display means (for example, the CPU 10 in FIG. 2; the explanation process 2 in FIG. 36) for performing the same function display on the first graph and the second graph on the display screen of FIG.
S163 to S169).

According to the nineteenth aspect of the present invention, the same function display is executed for the graphs displayed on the first display screen and the second display screen. Therefore,
The user can, for example, compare and see the same property for different graphs.

The invention according to claim 20 is provided with a display unit capable of splitting one display screen into at least a first split display screen and a second split display screen, and at least one split display screen is provided. In a graph display control device for displaying a graph on a screen (for example, the graph display control device 1 according to the fifteenth embodiment), a generation means for generating at least a first graph and a second graph (for example, the CPU 1 in FIG. 2).
0; S232) of the switching display processing in FIG. 47, a mode in which the first graph is displayed on the first split display screen and the second graph is displayed on the second split display screen, and the first A mode in which a graph is displayed on the entire first display screen, a mode in which the second graph is displayed on the entire first display screen, and the entire first display screen by overlapping the first graph and the second graph And a mode for switching the display mode (for example, the CPU 10 in FIG. 2; S234 to S242 in the switching display process in FIG. 47).

According to the invention of claim 20, 1
Switching display can be performed by a switching operation between a mode in which one display screen is divided into two and displayed and a mode in which a graph is displayed on the entire one display screen. For example, when the display is divided, the graph may be displayed in a small size and the details of the graph may be difficult to see. Even in such a case, the user can see the graph more clearly by switching to the single screen display and displaying. Also, after understanding the graph, you can switch to split screen display again and check the positional relationship with other graphs.
The user can better understand the graph.

[0049]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a graph display control device 1.
The present invention is related to displaying a graph by dividing the screen into a plurality of parts, and is intended to assist the user in grasping the function and the structure of the graph. Hereinafter, an embodiment of a graph display control device 1 according to the present invention will be described in detail with reference to the drawings.

In the following, various embodiments of the graph display control device 1 will be described in detail. The configuration of the graph display control device 1 in each embodiment is the same as that shown in FIGS. 1 and 2. Therefore, detailed description of the configuration of each part is omitted, and the same parts are denoted by the same reference numerals.

First Embodiment First, the first embodiment will be described in detail, including the common parts of the respective embodiments.

FIG. 1 is an external perspective view showing an example of the graph display control device 1 according to the present embodiment. As shown in FIG. 1, the graph display control device 1 includes a display screen 2, an input key 3, and an input pen 4 in the main body of the graph display control device 1. The graph display control device 1 has an input key 3
Various processes are executed according to the information input from, and the result of the process is displayed on the display screen 2. That is, the user uses the input keys 3 to input mathematical expressions (functions) and statistical information and various processing instructions. Then, the input contents and the processing result are confirmed on the display screen 2. A tablet 12 is integrally configured on the display screen 2 so that a pressing input by the input pen 4 can be detected.

FIG. 2 is a diagram showing an example of the internal configuration of the graph display control device 1. According to FIG. 1, the graph display control device 1 includes a CPU 10, an input unit 11, and a tablet 1.
2, a position detection circuit 13, a display unit 14, a display drive circuit 15, a RAM 16, a ROM 17, and a storage device 18.
And a storage medium 19 are mainly included.

The CPU 10 includes the input unit 11 and the tablet 1.
2, a predetermined program is read from the ROM 17 or the storage medium 19 on the basis of an instruction input via the RA 2.
The data is temporarily stored in M16, and various processes based on the program are executed to centrally control each unit of the graph display control device 1. That is, the CPU 10 executes various processes based on the read predetermined program, and outputs the process result as R
The data is stored in the work memory in the AM 16 and is displayed on the display unit 14 via the display drive circuit 15. In addition, according to an instruction input via the input unit 11 or the tablet 12, the processing result is stored in the storage medium 19 via the storage device 18.
To save.

The input section 11 includes a character / number key 11a mainly composed of a number input key, a character input key, and various operation key groups, and a direction key 11b ("↑" 11h / "↓" 11).
i · “→” 11j · “←” 11k, a screen division key 11c for instructing a two-screen display, a graph key 11d for instructing a graph drawing display, and a tray for instructing whether or not to execute a trace. It mainly comprises a ski 11e, a switching key 11f for instructing to change various display modes, and a release key 11g for instructing to release various processes. The input unit 11 outputs a depression signal of the depressed key to the CPU 10.

Tablet 12 and position detection circuit 13
Is a device that detects the position designated by the user with the input pen 4 and determines the coordinates thereof. Tablet 1
2 is integrated with the display screen 2 of the display unit 14,
In other words, the user will see the display screen 2 via the tablet 12. When the user uses the input pen 4 to indicate an arbitrary position on the display screen 2, that is, the tablet 12, the position detection circuit 13 detects the position,
Specify the coordinates. As a method for detecting the position, there are methods such as an electromagnetic induction method, a magnetostriction method, and a pressure sensitive method, but any method may be used here. The position detection circuit 13 outputs the detected coordinate data to the CPU 10.

The display unit 14 includes the display screen 2 of the graph display control device 1 shown in FIG. 1, and displays an image in response to a control signal input from the display drive circuit 15. The display unit 14 includes a CRT (Cathode Ray Tube) display, a liquid crystal display, and the like, but any of them may be used. The display drive circuit 15 also controls the display of the display unit 14 based on the drive signal input from the CPU 10.

The RAM 16 is a program development area developed when the CPU 10 executes a program, and the input unit 1
1 has a work area for temporarily storing input data input from the tablet 12 and various processing results.
As shown in FIG. 3A, the RAM 16 has a formula storage area 160 for temporarily storing a formula input from the input unit 11, and a CPU 10 stores the formula storage area 16.
A graph generation area for generating a graph based on the mathematical formula stored in 0.

The ROM 17 is a read-only semiconductor memory and stores the basic program executed by the graph display control device 1 according to the present invention. That is, an initial display program, a menu display program, various function calculation programs, character data, etc., which are executed when the power of the graph display control device 1 is turned on, are stored. Also,
The ROM 17 stores a program for executing the processing described in each embodiment described later. For example, in FIG.
As shown in (b), the graph drawing program 170, the divided display program 171, the trace processing program 17
2, function data 173, etc. are stored.

The graph drawing program 170 is a program for the CPU 10 to create a graph and display it on the display screen 2. The split display program 171 is a program for the CPU 10 to split the display screen 2 into two, that is, to display an image in a two-screen state. The trace processing program 172 is a program for the CPU 10 to display a trace pointer on the graph displayed on the screen and execute a process of tracing (tracing) the trace pointer on the graph. The function data 173 is data required when creating an input mathematical expression, and includes, for example, basic information for creating a linear function, a quadratic function, a trigonometric function, a circle, and the like.

The storage device 18 has a storage medium 19 for storing programs and data.
Is composed of a magnetic or optical storage medium or a semiconductor memory. The storage medium 19 is fixedly provided in the storage device 18 or is detachably attached to the storage device 18. The storage medium 19 includes the graph display control device 1
Various processing programs corresponding to the above, data processed based on the various processing programs, and the like are stored.

The program, data and the like stored in the storage medium 19 may be received and stored from another device connected via a communication line (not shown),
Furthermore, the program and data may be transferred from a storage medium and another device including the storage device via a communication line for use.

Now, the basic functions of the graph display control device 1 according to the present embodiment mainly include a graph drawing function, a graph trace function, and a screen division function.

The graph drawing function is a function executed by the CPU 10 based on the graph drawing program 170.
When a mathematical expression is input from the input unit 11, the CPU 10 outputs R
The input formula is temporarily stored in the formula storage area 160 of the AM 16. When an instruction to draw a graph (that is, a pressing signal of the graph key 11d) is input from the input unit 11, the graph creation area 1 of the RAM 16 is input.
61 is used to execute a process of creating a graph based on the graph drawing program 170 and the function data 173.

For example, from the input unit 11, the function y = f
When the instruction to display the graph of (x) is input,
First, the variable range of x (x _MIN , x _MAX ) and the range of y (y _MIN , y _MAX ) are determined. In the following, the setting of the range and the range will be determined according to the instruction input from the input unit 11. Further, the CPU 10 sets the x-axis in the horizontal direction and the y-axis in the vertical direction of the display screen 2 so that x per dot is
Increase amount Δx of y and increase amount y of y are determined. And
The value of y is calculated at intervals of 1 dot in the X-axis direction (that is, at intervals of Δx), and a graph is sequentially created.

In the following, the coordinate system on the display screen 2 will be referred to as the screen coordinate system (X, Y), and the coordinate system based on the mathematical formula will be referred to as the mathematical formula coordinate system (x, y). That is, the screen coordinate system is represented by a discrete value indicating the position of each dot. The range of the screen coordinate system is fixed depending on the number of dots on the display screen 2. On the other hand, the mathematical coordinate system is expressed by substantially continuous numerical values. As mentioned above,
Drawing range in the mathematical coordinate system (that is, range and range)
Shall be determined based on user input.

The graph trace function is a function of tracing the graph displayed on the display screen 2. Here, tracing means tracing a graph with a trace pointer. Specifically, the CPU 10
Displays a trace pointer on the graph when an instruction to execute a trace (that is, a pressing signal of the trace key 11e of the input unit 11) is input from the input unit 11.
Then, the trace pointer is moved onto the graph according to the instruction input from the input unit 11. For example, when the left key (“←” key 11k) is input, the trace pointer is moved along the graph in the X decreasing direction. On the contrary, when the right key (“→” key 11j) is input, it is moved in the increasing direction of X. Alternatively, when the up key (“↑” key 11h) is input, the trace pointer is moved in the Y-axis increasing direction along the graph.
On the contrary, when the down key ("↓" key 11i) is input, it is moved in the decreasing direction of the Y axis.

The screen division function is a function of dividing the display screen 2 into right and left. In the following, unless otherwise specified, the display screen 2 is divided into two left and right parts, and mathematical formulas are displayed on the left divided screen (hereinafter referred to as the left divided screen 20a).
The user can select at least two types of modes: a mode for displaying a graph on the right split screen (hereinafter referred to as a right split screen 20b) and a mode for displaying a graph on each of the left and right split screens. It will be configured.

FIG. 6 is a diagram showing a display example of a split screen. FIG. 6A is a diagram showing an example in which mathematical expressions are displayed on the left split screen 20a and graphs are displayed on the right split screen 20b. According to the figure, the display screen 2 is divided into two right and left by a straight line 21. Y ₁ is displayed on the left split screen 20a.
=, Y ₂ =, ..., and a plurality of left sides in the mathematical expression are displayed. When the user presses the input key 3 and inputs a character or number, the right side is displayed.
According to (a), (Y1 = X ^ 2) is displayed on the left split screen 20a. Also, on the right split screen 20b, (Y1 = X
^ 2) graph is displayed.

The CPU 10 causes the left split screen 20a of the display screen 2 to display a mathematical formula in accordance with a signal input from the input unit 11 and generates a graph based on the mathematical formula input according to the graph drawing program 170 to generate a right split screen. It is displayed on 20b. More specifically, the CPU 10 temporarily stores the mathematical formula input from the input unit 11 in the mathematical formula storage area 160 in the RAM 16, outputs the stored content to the display unit 14, and displays it on the left split screen 20a. At the same time, a graph is created based on the mathematical expression input in the graph creation area 161 in the RAM 16. Then, the graph created in the graph creation area 161 is output to the display unit 14 and displayed on the right split screen 20b. In addition, when a plurality of mathematical expressions are input, that is, when a plurality of right sides are input, a graph is generated for each of the mathematical expressions and displayed on the right split screen 20b in an overlapping manner.

FIGS. 6 (b) and 6 (c) are diagrams for explaining a mode for displaying a graph on each of the left and right split screens. (B) is an example of a formula input screen for inputting a formula, and (c) is a diagram showing an example of a graph display screen when displaying an input graph.

According to FIG. 6B, the display screen 2 has a straight line 2
It is divided into two left and right by 1 and a plurality of left sides in the mathematical expression are displayed on each divided screen, such as Y ₁ =, Y ₂ = ,. The user selects one of the split screens by pressing the left and right keys (“←” key 11k, “→” key 11j), and further, by pressing the input key 3 to input characters or numbers. , Enter the right hand side (ie the formula). According to (b), (Y1 = X ^ 3-X) and (Y2 = X) are displayed on the left split screen 20a, and (Y1 = X ^ 2) and (Y2) on the right split screen 20b. = -X + 3)
Is displayed.

According to FIG. 6C, the display screen 2 has a straight line 2
It is divided into two left and right by 1 and a graph is displayed on each divided screen. On the left split screen 20a, graphs of mathematical formulas (Y1 = X ^ 3-X) and (Y2 = X) are displayed, and on the right split screen 20b, mathematical formulas (Y1 = X ^ 2) and (Y2 = -X). +3) graphs are displayed respectively.

As described above, in the mode in which the graph is displayed on each of the two split screens, the mathematical expression storage area 160 in the RAM 16 and the graph creation area 161 are each an area for storing the information of the left split screen 20a. Various processes are executed separately for the area for storing information on the right divided screen 20b. FIG. 4 is a diagram showing an example of a storage format of the RAM 16 when displaying a graph on two split screens. According to the figure, the formula storage area 160 is divided into a left formula area 160a and a right formula area 160b. The graph creation area 161 is divided into a left graph area 161a and a right graph area 161b.

While the formula input screen is being displayed, the CPU 10 responds to the input of the left key and the right key, and the left formula area 160a and the right formula area 16 in the formula storage area 160.
Either one of 0b is selected to determine the input destination of the characters or numbers to be input. Further, when an instruction to create a graph is input, a graph is created in the left graph area 161a based on the information stored in the left mathematical expression area 160a,
In the right graph area 161b, a graph is created based on the information stored in the right mathematical expression area 160b. Further, the graph created in the left graph area 161a is displayed on the left split screen 20a, and the graph created in the right graph area 161b is displayed on the right split screen 20b.

In the following, the mode in which the graph is displayed on only one of the split screens is simply called the graph mode, and the mode in which the graph is displayed on the left and right split screens is called the dual graph mode. In addition, in the following, in the case of dual graph setting, as shown in FIG. 4, the mathematical expression storage area 160 in the RAM 16 and the graph creation area 161 are
Area for left split screen 20a and right split screen 2 respectively
It is assumed that the area is divided into the area for 0b and the graph can be created and displayed independently of each other.

In the first embodiment, the graph display control device 1 displays different graphs on the two left and right split screens and sets the tracing pointers (trace pointers) at the time of setting the dual graph. Display on the graph and trace. At that time, the trace pointers on each graph are moved in conjunction with each other in response to the input instruction. In the first embodiment, the case where the user instructs the moving direction of the trace pointer with the left and right keys will be described as an example.

FIG. 7 is a diagram showing a display example of a split screen in the first embodiment. According to the figure, the display screen 2
Is divided into two left and right by a straight line 21. Cross lines are displayed on the left split screen 20a and the right split screen 20b, respectively, and vertical lines 30 and 32 indicate the Y axis, and horizontal lines 31 and 33 indicate the X axis. Further, a quadratic function is displayed on the left split screen 20a, a cubic function is displayed on the right split screen 20b, and trace pointers 40a and 40b are displayed on the graph of each function. The numerical value displayed below each split screen is the coordinate of each trace pointer. That is, the numerical value displayed below the left split screen 20a indicates the coordinates of the trace pointer 40a displayed on the graph of the quadratic function. Similarly, the numerical value displayed below the right split screen 20b indicates the coordinates of the trace pointer 40b displayed in the graph of the cubic function.

When a plurality of expressions (functions) are input from the input unit 11, the CPU 10 displays a graph on each divided screen as shown in FIG. 7, and further displays a trace pointer at one point on each graph. . Then, each trace pointer is moved onto the graph in response to the input of the left and right keys. For example, when the right key is pressed, the trace pointers 40a and 40b displayed on the left and right split screens are simultaneously moved along the graph by unit dots in the increasing direction of the X axis. Also, the trace pointer 40a
The value of the coordinate displayed below is changed with the movement of 40b. Hereinafter, the trace pointer displayed on the left split screen 20a is referred to as a left trace pointer 40a, and the trace pointer displayed on the right split screen 20b is referred to as a right and race pointer 40b.

The ROM in the first embodiment
As shown in FIG. 3B, 17 is at least a graph drawing program 170 and a split display program 171.
, Trace processing program 172, and function data 17
Remember 3 and 3. However, the trace processing program 172 in the first embodiment includes a program and data for moving the trace pointers of the graph displayed on the two split screens in accordance with the input instruction.

FIG. 5 shows C in the first embodiment.
It is a flowchart explaining the trace process (1) by PU10. When the CPU 10 receives a two-split screen display instruction, that is, a dual graph mode setting instruction, from the input unit 11, the CPU 10 performs dual graph setting (step S1). Specifically, the mathematical expression storage area 160 in the RAM 16 is defined as a left mathematical expression area 160a and a right mathematical expression area 160.
b, the graph creation area 161 is divided into a left graph area 161a and a right graph area 161b, and symbols such as letters and numbers input from the input unit 11 are further divided into the left mathematical expression area 160a and the right mathematical expression area 160b. In the left graph area 161a and the right graph area 16
In 1b, a graph is created based on the mathematical expressions respectively input, and settings are made to display the graph.

When a mathematical expression is input to each split screen (step S2) and an instruction to generate a graph is input, the CPU 10 creates a graph based on the mathematical expressions stored in the left mathematical expression area 160a and the right mathematical expression area 160b. To generate.
At this time, the CPU 10 causes the graph drawing program 170
And a graph is generated based on the function data 173.
Then, the generated graph is displayed on each divided screen (step S3).

The CPU 10 displays a trace pointer on each graph when the creation / display of each graph is completed and an instruction to execute a trace is input, and the trace pointer is displayed according to the instruction input from the input unit 11. Move in conjunction. That is, the x-coordinates (mathematical coordinate system) of the trace pointers are moved to be equal. However, the coordinate ranges of the graphs displayed on the left and right split screens are not always equal. For example, depending on the user, left split screen 2
The variable range of 0a is set to −10 ≦ x ≦ 10 and the right split screen 20b is set.
When the variable range of is set as −5 ≦ x ≦ 30, 1
Increase in x-coordinate (mathematical coordinate system) with respect to dot spacing Δx
However, the left split screen 20a and the right split screen 20b are different from each other.

Therefore, in the first embodiment, the movement of the right and race pointers 40b is determined on the basis of the movement of the left trace pointer 40a. First, the CPU 10
The unit movement amount Δx _L of the left trace pointer 40a is determined. Specifically, a value obtained by dividing the variable range (x _MAX −x _MIN ) of the graph displayed on the left split screen 20a by the number of dots on the display screen 2 is set as the unit movement amount Δx _L.

When the instruction to execute the trace is input, the CPU 10 determines and displays the initial position of the left trace pointer 40a (step S4). Specifically, first, the initial value of the x coordinate in the mathematical formula coordinate system is determined. The initial value of the x-coordinate may be determined according to an input instruction, or may be determined as a default position (for example, a position where x = 0 or a minimum value x _{MIN of the} variable range). Then, when the initial value x _L of the x coordinate is determined, the initial value y _L of the corresponding y coordinate is determined. Then, the coordinates in the screen coordinate system (that is, the position in the display screen 2) are determined based on the initial coordinates (x _L , y _L ) in the mathematical formula coordinate system. The initial position (X _L , in the determined screen coordinate system,
The left trace pointer 40a is displayed on (Y _L ). Also,
At the same time, the initial coordinates of the left trace pointer 40a (x _L ,
y _L ) is displayed below the left split screen 20a (step S5).

Next, the CPU 10 displays the right split screen 20b.
The display position of the right trace pointer 40b in
It At this time, the first x coordinate of the left trace pointer 40a
Period x _LIs the domain of the graph displayed on the right split screen 20b
Or not is determined (step S6). Included
If not (NO), the right trace pointer 40b is displayed.
Not shown, the process proceeds to step S9.

On the other hand, when the initial value x _L of the x coordinate of the left trace pointer 40a is included in the domain of the graph of the right split screen 20b (YES), the right position is set to the corresponding position on the graph of the left split screen 20a. The trace pointer 40b is displayed (step S7). Specifically, the x coordinate x _L of the left trace pointer 40a is substituted into the formula y = f _R (x) input to the right split screen 20b, the y coordinate of the right trace pointer 40b is calculated, and the right coordinate is calculated. The coordinates (x _R , y _R ) of the trace pointer 40b in the mathematical coordinate system are determined. However, x _L = x _R. Then, the coordinates (X _R , Y _R ) in the screen coordinate system are determined based on the determined coordinates (x _R , y _R ) and the right trace pointer 40b is displayed. Further, the coordinates (x _R , y _R ) in the mathematical formula coordinate system are displayed below the right split screen 20b (step S8).

Subsequently, the CPU 10 determines whether or not the displayed trace pointer moves (step S9). At this time, if an instruction to end the trace process is input from the input unit 11 (NO), the process ends. On the other hand, when the left / right key pressing signal is input from the input unit 11, the left trace pointer 40a is moved in the direction designated by one dot in the X-axis direction (step S10). Specifically, the movement amount of one dot Δx _L
And the formula f input to the left split screen 20b
_{Based on L} (x) and the current position (x _L , y _L ),
The coordinates of the left trace pointer 40a in the mathematical formula coordinate system are obtained. Specifically, x _L = (x _L ± Δx _L ), y _L = (y
_L ± f (x _G ± Δx _L )). Further, the coordinates (X _L , Y _L ) in the screen coordinate system are determined based on the obtained coordinates (x _L , y _L ) in the coordinate system.

Next, the CPU 10 determines that the x coordinate (x _L ) of the left trace pointer 40a after the movement is the right divided screen 20b.
It is determined whether or not it is included in the coordinate range (variable range) of. If not included, the process moves to step S14 without displaying the right trace pointer 40b. On the other hand, when the x coordinate (x _L ) is included in the domain of the graph of the right split screen 20b,
The movement amount of the right trace pointer 40b corresponding to the movement amount Δx _L of the left trace pointer 40a is calculated (step S12). Specifically, x of the left trace pointer 40a
The coordinate (x _L ) is expressed by the formula f _R (x) for the right split screen 20b.
And the coordinates (x _R , y _R ) are calculated. Then, the coordinates (X _R , Y _R ) in the screen coordinate system are calculated and the right trace pointer 40b is displayed (step S13).

Further, the left trace pointer 40a after the movement
And the coordinates of the right trace pointer 40b are displayed in the lower direction of the screen (step S14). Then, it is again determined whether or not the trace pointer moving process is to be performed (step S15). That is, when a trace pointer movement instruction is input from the input unit 11 (YES), the process returns to step S10 and is repeated. On the other hand, if an instruction to end the trace processing is input (NO), this processing ends.

As described above, in the first embodiment,
The screen is divided into two left and right parts to display different graphs, and a trace pointer is displayed on each graph to move the graphs in conjunction with each other. At that time, the coordinates are displayed below each divided screen. Therefore, the user can more easily visually understand the positional relationship, size, structure, etc. of each graph displayed on each split screen.

[Second Embodiment] In the second embodiment, the graph display control device 1 divides the display screen 2 into two parts on the left and right, similarly to the first embodiment. Different graphs are displayed on each split screen, and a trace pointer is displayed to trace each graph.

However, in the second embodiment, the statistical graph is displayed on the left and right split screens. That is, the CPU 10
When the statistical data is input from the input unit 11, generates a line graph, a bar graph, a band graph, a pie graph, and the like and displays them on each divided screen. More specifically, the input unit 1
For two data groups input as statistical data from 1, one is determined with the horizontal axis and the other with the vertical axis according to the input instruction. In addition, the scale of the mathematical expression coordinate system with respect to the screen coordinate system is determined and a statistical graph is created.

FIG. 8 is a diagram showing a display example of a split screen according to the second embodiment. According to the figure, the display screen 2
Is divided into two left and right by a straight line 21. Also,
A line graph is displayed on the left split screen 20a, and a line graph is displayed on the right split screen 20a.
A bar graph is displayed in each of b, and trace pointers 40a and 40b are displayed on each statistical graph. C
The PU 10 follows the instruction input from the input unit 11
Left trace pointer 40a and right trace pointer 40b
Is moved along the graph one dot at a time in the specified direction (right or left).

The ROM according to the second embodiment
As shown in FIG. 9, 17 is at least a graph drawing program 170, a divided display program 171, a trace processing program 172, and a statistical processing program 17.
4 and are memorized. The statistical processing program is C
PU10 is a program for displaying the screen which supports input of statistical data. Further, the graph drawing program 170 includes the statistical processing program 17
A program is included for generating a statistical graph based on the information generated according to 4.

FIG. 10 shows C in the second embodiment.
It is a flowchart for demonstrating the trace process (2) of PU10. First, when the dual graph mode setting instruction and the statistical data display instruction are input from the input unit 11, the CPU 10 sets the dual graph (step T1). That is, the screen is divided into two left and right, and settings are made to display different statistical graphs on each divided screen. At that time, the CPU 10 displays an input screen for the user to input statistical data according to the statistical processing program 174. Further, when displaying the input screen, the display screen 2 is divided into two parts, left and right, and displayed so that two types of statistical data can be input. Then, when the statistical data is input from the input unit 11 (step T
2), the CPU 10 creates a statistical graph according to the statistical processing program 174 and the graph drawing program 170. Specifically, the coordinate scale in each divided screen is determined, and the domain of the statistical graph is determined. Then, a statistical graph is created within the determined coordinate range (coordinate range in the graph coordinate system). Then, the created graph is displayed on each corresponding divided screen (step T3).

The processing after step T4 is the same as the content described with reference to FIG. 5 in the first embodiment. However, in the first embodiment, the case where the left trace pointer 40a is shifted by one dot in response to the input instruction has been described as an example, but the present invention is not limited to this. For example, if the statistical graph displayed on the left split screen 20a is a line graph represented by statistical values at intervals of 5 dots in the X-axis direction, move 5 dots per movement of the trace pointer. It may be set to.

When the intervals of the statistical values displayed on the left and right split screens are different, for example, the statistical graph displayed on the left split screen 20a is based on the statistical data having values at 5 dot intervals in the X-axis direction. On the other hand, the statistical graph displayed on the right split screen 20b may be based on statistical data having values at 8-dot intervals in the X-axis direction. In such a case, the trace pointer may be moved for each statistical value according to the input instruction. Alternatively, the right split screen 20b
According to the scale of the left split screen 20a,
You may set so that the amount of movement to at least right and left may become equal.

As described above, according to the second embodiment, it is possible to trace the graph based on the statistical data with the trace pointer. Therefore, by displaying the display position and coordinates of the trace pointer for the two different statistical data, it is possible to clarify the difference between the two statistical data and help the user grasp the graph.

[Third Embodiment] In the present third embodiment, the graph display control device 1 uses
It is assumed that the user can set two types of variable areas. Specifically, the domain A and the domain B of the range including the domain A are 2
The type can be set, and the graphs of the two types of set range are displayed on the display screen 2 at the same time. In the following, for the sake of convenience, one domain is referred to as a standard range and the other domain is referred to as a scaling range.

FIG. 11 is a diagram showing an example of the display screen 2 in the third embodiment. According to the figure, the window 50b is displayed on the upper right of the display screen 2. Further, a cross line is drawn in a portion other than the window 50b of the display screen 2, a vertical line 51 is the Y axis, and a horizontal line 52 is the X axis.
Each axis is shown. Below, the part of the display screen 2 other than the window 50b is called the standard screen, and the upper right window is called the enlargement / reduction screen. According to the figure, a cubic function is displayed on the standard screen. On the other hand, in the scaling screen,
An enlarged view near the display position of the trace pointer 53a is displayed.

Further, according to the figure, the coordinates of the trace pointer are displayed at the lower left of the standard screen. CPU10
Displays the coordinates of the trace pointer (mathematical coordinate system) based on the highly accurate coordinate system of the standard screen and the scaling screen. For example, when a magnified view of a graph is displayed on the scaling screen, the unit of coordinates displayed on the scaling screen is smaller than the unit of coordinates displayed on the standard screen. That is, the coordinate system of the scaled screen has higher accuracy than the coordinate system of the standard screen. Therefore, the CPU 10 displays the coordinates of the trace pointer based on the coordinate system of the scaled screen. On the other hand, when a reduced view of a graph is displayed on the scaling screen, the unit of coordinates displayed on the scaling screen is coarser than the unit of coordinates displayed on the standard screen. In this case, the CPU 10 displays the coordinates of the trace pointer based on the standard screen coordinate system. In the following, the trace pointer displayed on the standard screen will be referred to as the standard trace pointer, and the trace pointer displayed on the scaled screen will be referred to as the scaled trace pointer.

The ROM according to the third embodiment
As shown in FIG. 3B, 17 is at least a graph drawing program 170 and a split display program 171.
, Trace processing program 172, and function data 17
3 and are memorized. However, the split display program 171
Includes a program for displaying a standard screen and a scaling screen on the display screen 2. In addition, the graph drawing program 170 has two different scales for one function.
Includes a program to generate two graphs.

FIG. 12 shows the third embodiment of the present invention.
It is a flow chart for explaining trace processing (3) by CPU10. When the instruction signal to display the enlargement / reduction graph is input from the input unit 11, the CPU 10 sets the dual graph (step S20). That is, the graph for displaying on the standard screen is created with the standard scale, and on the other hand, the setting for creating the graph for displaying on the scaling screen with the enlarged or reduced scale is performed. Specifically, the graph creation area 161 of the RAM 16 is divided into a standard area and a scaling area, and settings are made to create and display a standard and scaling graph. Then, when a mathematical expression is input from the input unit 11 (step S21), a standard scale graph and an enlarged / reduced scale graph are created for the mathematical expression input based on the graph drawing program 170 and the function data 173. Each is displayed on the display screen 2 (step S2
2).

When the instruction to execute the trace is input from the input unit 11, the CPU 10 makes settings for starting the trace. First, the initial position of the standard trace pointer 53a is determined and displayed (step S23). The initial position of the standard trace pointer may be determined according to the instruction input from the input unit 11, or may be determined as the default position. Then, the coordinates (x _S , y _S ) of the displayed standard trace pointer 53a in the mathematical formula coordinate system are displayed in the lower left part of the standard screen (step S24). Also,
The CPU 10 determines whether the x coordinate (x _S ) of the standard trace pointer 53a is included in the coordinate range (variable range) of the graph of the enlarged / reduced screen (step S25). If not included (NO), the process proceeds to step S29. On the other hand, when the standard trace pointer 53a is included in the coordinate range of the enlargement / reduction screen (YES), the enlargement / reduction trace pointer 53b is displayed in the enlargement / reduction screen (step S26). That is, the coordinates in the screen coordinate system are determined based on the coordinates (x _S , y _S ) and the scaling trace pointer 53b is displayed.

Then, the CPU 10 compares the coordinates of the standard screen and the scaled screen for accuracy (step S27). CPU
When displaying the coordinates of the trace pointer, 10 displays the coordinates of the finer accuracy. That is, when the coordinate accuracy of the standard screen is higher than the coordinate accuracy of the enlarged / reduced screen, the process proceeds to step S29 while the coordinates of the standard trace pointer 53a are displayed. On the other hand, when the coordinate accuracy of the scaling screen is high, the coordinate value of the scaling pointer is displayed (step S
28).

Subsequently, the CPU 10 determines whether or not to move the trace pointer (step S29). At this time, if an instruction to end the trace process is input from the input unit 11, this process ends. On the other hand, when the left / right key pressing signal is input from the input unit 11, the standard trace pointer 53a is moved in the direction designated by one dot (step S30). Then, it is determined whether or not the coordinates of the standard trace pointer 53a are included in the domain of the graph of the scaling screen (step S31). If not included, the scaling trace pointer 53b is not displayed,
Control goes to step S33. On the other hand, if included,
The scaling trace pointer 53b is displayed (step S3).
2). At this time, the CPU 10 determines the movement amount on the enlargement / reduction screen corresponding to the movement amount of the standard trace pointer 53a based on the difference between the coordinate scale on the standard screen and the coordinate scale on the enlargement / reduction screen, and the enlargement / reduction trace pointer 53.
The display position and coordinates of b are determined.

Then, the coordinates of the trace pointer are updated (step S33). At this time, the coordinates based on the coordinate system with high coordinate accuracy determined in step S29 are displayed. In this way, when the movement of the trace pointer is completed, the CPU 10 determines whether or not to further move the trace pointer (step S34). At this time, if an instruction to end the trace process is input from the input unit 11 (NO), the process ends. On the other hand, when a movement instruction (left and right keys) is input from the input unit 11 (YES), the process returns to step S30 and the process is repeated.

As described above, displaying the graph with two kinds of scales can help the understanding of the graph. Regarding coordinate display, it was decided to display only highly accurate values. Therefore, the user can know more accurate coordinates of the trace pointer at the time of tracing.

[Fourth Embodiment] In the fourth embodiment, the graph display control device 1 creates a graph viewed from each axial direction with respect to a three-dimensional graph consisting of three variables. Display the trace pointer on the graph.
Specifically, for a graph of a function consisting of three variables (X, Y, Z), a projection graph projected on the XY plane and YZ
A projection graph projected onto the plane and a projection graph projected onto the ZX plane are created, respectively, and these projection graphs are simultaneously displayed on the display screen 2.

FIG. 13 is a diagram showing an example of the display screen 2 in the fourth embodiment. According to the figure, the display screen 2 is divided into four. The coordinates of the trace pointer are displayed on the upper right divided screen 60d, the projection graph obtained by projecting the three-dimensional graph A on the ZX plane is displayed on the lower right divided screen 60c, and the projection graph on the upper left divided screen 60a is 3 A projection graph obtained by projecting the three-dimensional graph A on the XY plane is displayed, and the three-dimensional graph A is displayed on the lower left split screen 60b as YZ.
A projection graph projected on a plane is displayed. CPU1
0 is the trace pointers 61a and 61 on each projection graph.
b. 61c is displayed and moved in accordance with the input instruction, and the coordinates of the trace pointer displayed on the upper right split screen 60d are sequentially updated.

The ROM in the fourth embodiment
As shown in FIG. 14, 17 is at least a projection graph creation program 180 and a split display program 171.
And the trace processing program 172 are stored. Here, the projection graph creation program 180 is the CPU 1
0 is a program for generating a graph projected on each plane based on a mathematical expression consisting of three variables. Further, in the divided display program 171 in the fourth embodiment, the display screen 2 is divided into four, each projection graph is displayed on a different divided screen, and the coordinate of the trace pointer is divided into one. It includes a program for displaying on the screen. Furthermore, the trace processing program 172
Includes a program for tracing the trace pointer in conjunction with each projection graph.

FIG. 15 shows C in the fourth embodiment.
It is a flowchart for demonstrating the trace process (4) which PU10 performs. When the CPU 10 first inputs an instruction to display a three-dimensional graph from the input unit 11,
Three-dimensional three-screen setting is performed (step S40). That is, the display screen 2 is divided into four, the projection graph for each plane is displayed on three divided screens, and the setting for displaying the coordinates of the trace pointer on the remaining one divided screen is performed.
In addition, the graph creation area 161 of the RAM 16 is shown in FIG.
As shown in FIG. 3, an XY plane projection area 162a for creating a graph obtained by projecting a three-dimensional graph on the XY plane, and 3
A YZ plane projection area 162b for creating a graph obtained by projecting a three-dimensional graph on the YZ plane, and a three-dimensional graph ZX
And a ZX plane projection area 162c for creating a graph projected on a plane. Further, the CPU 10 is X
The setting for displaying the projection graph on the Y plane on the first split screen with a predetermined scale and the (XYV-Window) setting are performed (step S41). Similarly, (YZ · V-Window) setting (step S42) and (ZX · V-Window) setting (step S43) are performed so that the projection graphs of the YZ plane and the ZX plane can be displayed.

Subsequently, when the mathematical expression is input from the input unit 11 (step S44), the CPU 10 creates a graph. Specifically, first, the correspondence between the screen coordinate system and the mathematical formula coordinate system is determined. That is, the range in the numerical coordinate system to be displayed in the screen coordinate system is set, and the amount of change in the numerical coordinate system per dot in the screen coordinate system (Δ
x, Δy, Δz). Then, a projection drawing of a three-dimensional graph for each two-dimensional plane is created. For example, xy
When creating a projection graph for a plane, the x-coordinate and y-coordinate values satisfying a given mathematical formula are calculated for each interval Δz in the z-coordinate range z _MIN ≤z ≤z _MAX . And the domain z
All x-coordinates and y calculated for _MIN ≤ z ≤ z _MAX
Project the coordinates onto the xy plane. For the yz plane, zx
The same is calculated for the plane. Then, the created projection graph is displayed on each divided screen (step S45).

Next, when an instruction to execute the trace is input from the input unit 11, the CPU 10 sets the trace process (step S46). Specifically, CPU1
0 determines the initial position of the trace pointer and displays the trace pointer for each projection graph. Then C
PU10 determines the input signal input from the input part 11 (step S47). At this time, if an instruction to end the process is input from the input unit 11, the process ends.

On the other hand, when the direction key depression signal is input from the input unit 11, the trace pointers on each projection graph are moved in conjunction with each other. Specifically, first, the trace pointer on the XY plane is moved (step S
48). At this time, when the input is a left / right key pressing signal, the trace pointer is moved by one dot along the X-axis direction, and the value of the Y coordinate is determined. Alternatively, when the up / down key is input, the trace pointer is moved by 1 dot in the Y-axis direction, and the X-axis value is determined. When the trace pointer movement amount on the XY plane is thus determined, the trace pointer movement amount on the YZ plane and the ZX plane is determined accordingly (step S49). That is, the Z coordinate is determined based on the values of the X coordinate and the Y coordinate determined on the XY plane. Then, the trace pointer on the YZ plane is moved (step S50), and similarly, the trace pointer on the ZX plane is moved (step S51).

Further, the CPU 10 updates the value of the X coordinate of the split screen 60d on the upper right of the display screen 2 (step S52), and the value of the Y coordinate (step S53), and Z
The coordinate value is updated (step S54). Then, it is determined whether or not the trace pointer is further moved (step S55). At this time, if the instruction to move the trace pointer has not been input from the input unit 11 (NO), this processing ends. On the other hand, when a trace pointer movement instruction (that is, a direction key depression signal) is input from the input unit 11 (YES), the process proceeds to step S48 and the process is repeated.

As described above, the projection graph obtained by projecting the three-dimensional graph on each plane is displayed on the screen at the same time, and the trace pointer is traced to help the user to grasp the positional relationship with the three-dimensional graph. it can.

In the fourth embodiment, the movement of the trace pointer on the XY plane is centered on the YZ plane, Z
It has been described as determining the movement of the trace pointer in the X plane. That is, the case where the trace pointer is movable only along the X-axis direction or the Y-axis direction has been described as an example. However, the present invention is not limited to this, and for example, the user can select the XY plane, the YZ plane, and the ZX plane, and the moving direction of the trace pointer in response to the input on the selected screen. May be set to determine. In this case, the user presses the Z key
It is possible to specify the movement of the trace pointer in the axial direction.

[Fifth Embodiment] In the fifth embodiment, the graph display control device 1 divides the display screen 2 into left and right parts and displays a plurality of graphs on one of the divided screens. Then, the coordinates of the trace pointer on each graph are displayed on the other split screen. In the following, the user specifies the movement of the trace pointer with the left and right keys,
The individual trace pointers all have the same X coordinate. That is, the graph display control device 1 responds to the input of the left and right keys and moves the trace pointer on each graph in conjunction with each other along the X-axis direction.

FIG. 17 is a diagram showing an example of the display screen 2 in the fifth embodiment. According to the figure, the display screen 2 is divided into two left and right. On the left split screen 20a, one quadratic function and two linear functions having different inclinations are displayed. Further, trace pointers 70a, 70b, 70c are displayed on each graph. FIG. 17
, Each trace pointer 70a, 70b, 7
The X coordinates of 0c are equal. The coordinates of the trace pointers arranged on each graph are displayed on the right divided screen 20b. When a plurality of mathematical expressions are input from the input unit 11, the CPU 10 displays all graphs on the left split screen 20a in an overlapping manner. Then, the trace pointer is displayed on each graph, and the coordinates of the trace pointer in the mathematical expression coordinate system are displayed on the right divided screen 20b.

The ROM in the fifth embodiment
As shown in FIG. 3B, the storage 17 stores a graph drawing program 170, a divided display program 171, a trace processing program 172, and function data 173. However, the graph drawing program 170 includes a program for superimposing and displaying a plurality of graphs on one coordinate system. In addition, the trace processing program 172 includes
It includes a program for displaying trace pointers for individual graphs displayed in one coordinate system (one divided screen) and interlockingly tracing the graphs.

FIG. 18 shows C in the fifth embodiment.
It is a flowchart for demonstrating the trace process (5) by PU10. However, in the following, left split screen 2
The case where n graphs are displayed on 0a will be described as an example.

First, when an instruction to display a plurality of graphs in an overlapping manner is input from the input unit 11, the CPU 10 sets the graph display (step S60). That is, the display screen 2 is divided into two left and right, and a plurality of graphs are displayed on the left divided screen 20a and the coordinates of the trace pointer on each graph are displayed on the right divided screen 20b.
Next, when a plurality of mathematical expressions are input from the input unit 11 (step S61), each graph is created based on the graph drawing program 170 and the function data 173. Then, the plurality of created graphs are overlapped and displayed on the left split screen 20a (step S62).

When the display of each graph is completed and an instruction to trace is input from the input unit 11, the CPU 10 executes the trace processing according to the trace processing program 172. Specifically, first, a trace pointer for tracing is displayed. Therefore, the CPU 10
First, the initial value of the x coordinate of the trace pointer is determined. x
The initial value of the coordinates may be determined according to an instruction input from the input unit 11 or may be determined as a default position. Then, when the initial value of the x coordinate is determined, the CPU 10
Resets the argument i for reading each of the n graphs to zero (step S63), and then adds 1 to the argument i (step S64). That is, when the argument i is zero, it is 1, and when it is 1, it is 2. Thus, the argument i
The graph is set to be read sequentially by incrementing.

When the CPU 10 reads the i-th graph, the trace pointer (i-th trace pointer) for the i-th graph based on the determined initial value of the x coordinate.
The coordinates (x _I , y _I ) in the formula coordinate system and the coordinates (X _I , Y _I ) in the screen coordinate system are determined. Then, the i-th and the race pointer are displayed on the left split screen 20a (step S
65) Further, the coordinates (x _I , y _I ) of the i-th trace pointer are displayed on the left split screen 20b (step S66).
When the coordinate corresponding to the determined initial value of the x coordinate does not exist on the graph of the coordinate range of the left split screen 20a, the trace pointer cannot be displayed as a matter of course. In such a case, it is not necessary to force the trace pointer to be displayed.

When the display of the i-th trace pointer and the coordinate display are completed, the CPU 10 determines whether or not the trace pointer is displayed for all n graphs (step S67). If there is an unprocessed graph, the process proceeds to step S64 and the process is repeated. If all graphs have trace pointers, then
It is determined whether or not to move the trace pointer (step S68). At this time, if an instruction to end the trace process is input from the input unit 11, this process ends.

When the left and right keys are input from the input unit 11 in step S68, the trace pointer on each graph is moved by one dot in the X-axis direction along each graph (step S69). . That is, the x coordinate is determined based on the movement amount Δx of the mathematical coordinate system with respect to the one dot interval of the screen coordinate system, and the y coordinate on each graph is calculated with respect to the determined x coordinate. Further calculated (x, y)
The coordinates (X, Y) in the screen coordinate system are calculated based on the coordinates, and the trace pointer is displayed. Further, the x coordinate in the mathematical formula coordinate system and the y coordinate value of each trace pointer are displayed on the right divided screen 20b (step S70).

When the movement of the trace pointer of each graph is completed, the CPU 10 determines whether or not to move the trace pointer further (step S71). For example, when an instruction to end the trace process is input from the input unit 11 (NO), this process ends. on the other hand,
When the movement instruction is input from the input unit 11 (YES), the process returns to step S69 and the process is repeated.

As described above, according to the fifth embodiment, a plurality of graphs are displayed so as to be superimposed on the same coordinate system, and the trace pointer on each graph is moved in conjunction with each other. Therefore, the user can recognize the features and differences of each graph at a glance by the movement of the trace pointer. Further, since the coordinates of each graph are displayed in association with each other on the right divided screen 20b, the user can know the specific difference in the numerical values.

[Sixth Embodiment] In the sixth embodiment, the graph display control device 1 divides the display screen 2 into left and right parts and displays different graphs on the respective divided screens. At that time, in the graph displayed on one split screen,
Tracing is performed in the X-axis direction, and the graph displayed on the other split screen is traced in the Y-axis direction.

FIG. 19 is a diagram showing an example of an image in the sixth embodiment. According to the figure, the display screen 2 is divided into two right and left by a straight line 21. A quadratic function is displayed on the left split screen 20a, and a cubic function is displayed on the right split screen 20b. A trace pointer is displayed on each graph, the coordinates of the left trace pointer 40a are displayed below the left split screen 20a, and the coordinates of the right trace pointer 40b are displayed below the right split screen 20b. Has been done.

When the left / right key pressing signal is input from the input unit 11, the CPU 10 moves the left trace pointer 40a displayed on the graph of the left split screen 20a along the graph by one dot in the X-axis direction. Let On the other hand, when the up / down key pressing signal is input from the input unit 11,
The right trace pointer 40b displayed on the graph of the right split screen 20b is moved along the graph by one dot in the Y-axis direction.

The ROM in the sixth embodiment
As shown in FIG. 3B, 17 is at least a graph drawing program 170 and a split display program 171.
, Trace processing program 172, and function data 17
3 and are memorized. The trace processing program 17
2 includes a processing program for individually operating each trace pointer displayed on the left and right split screens.

FIG. 20 shows C in the sixth embodiment.
It is a flow chart for explaining trace processing (6) by PU10. The CPU 10 has an input unit 11
The dual graph setting is performed in response to the instruction signal input from (step S80). That is, the display screen 2 is divided into two left and right, and a left split screen 20a and a right split screen 20
Settings for displaying different graphs in b and b are performed. Then, when a mathematical expression is input from the input unit 11 (step S81), a graph of the input mathematical expression is created based on the graph drawing program 170 and the function data 173, and either the left split screen 20a or the right split screen 20b is created. Display on the corresponding split screen (step S8)
2).

When the instruction to execute the trace is input from the input unit 11 (step S83), the CPU 10 starts the trace processing according to the trace processing program 172. First, the CPU 10 determines whether or not to trace with the left split screen 20a as a reference according to the instruction input from the input unit 11 (step S84).

When tracing is performed with the left split screen 20a as a reference, first, the left trace pointer 40a is displayed on the left split screen 20a (step S85). The initial position of the left trace pointer 40a may be determined according to the instruction input from the input unit 11 or may be displayed at the default position. When the left trace pointer 40a is displayed,
The coordinates in the mathematical formula coordinate system are displayed (step S8).
6). Then, with the left split screen 20a as a reference, the right trace pointer 40b is displayed on the right split screen 20b (step S87), and further, the coordinates in the mathematical formula coordinate system are displayed (step S88).

On the other hand, in step S84, the right split screen 2
When the instruction based on 0b is input, the right trace pointer 40b is displayed on the right divided screen 20b (step S89). The initial position of the left trace pointer 40a may be determined according to the instruction input from the input unit 11 or may be displayed at the default position. When the right trace pointer is displayed, the coordinates in the mathematical formula coordinate system are displayed (step S90). And right split screen 2
On the basis of 0b, the left trace pointer 40a is displayed on the left split screen 20a (step S91). Further, the coordinates in the mathematical formula coordinate system are displayed (step S9).
2).

Next, the CPU 10 determines whether or not to move each trace pointer (step S93).
At this time, if an instruction to end the trace process is input from the input unit 11 (NO), this process ends. on the other hand,
If there is a key input (YES), trace X
Determine whether to execute for the axis. That is, it is determined whether or not the input is an up / down key (step S9).
4).

When the left / right key pressing signal is input from the input unit 11 (NO; X axis), the left trace pointer 40a of the left split screen 20a is moved. That is,
The left trace pointer 40a is moved by one dot with respect to the X axis based on the input of the left / right key (step S95).
At this time, if the left split screen 20a is selected as the reference in step S84, the left trace pointer 40a is moved based on the left split screen 20a.
When the right split screen 20b is selected as a reference, the movement of the left trace pointer 40a is changed to the right split screen 2
0b is used as a reference.

On the other hand, when the up / down key pressing signal is input from the input unit 11 (YES; Y axis), the right split screen 2 is displayed.
The right trace pointer 40b of 0b is moved. That is, the right trace pointer 40b is moved by one dot with respect to the Y axis based on the input of the up / down key (step S96). At this time, when the left divided screen 20a is selected as the reference in step S84, the right trace pointer 40b is set with the left divided screen 20a as the reference.
When the right divided screen 20b is selected as the reference, the right and the race pointer 40b are moved with the right divided screen 20b as the reference.

When the movement of the trace pointer is completed, the amount of movement is calculated (step S97), and the coordinates of the trace pointer in the mathematical formula coordinate system are calculated. Then, the coordinates of the previously displayed trace pointer are updated (step S98). Now, when displaying the coordinates of the trace pointer, the CPU 10 determines the signal input from the input unit 11 and determines again whether or not to move the trace pointer (step S99). At this time, when a direction key press signal is input from the input unit 11, step S94
Return to and repeat the process. On the other hand, when another signal is input from the input unit 11, it is determined whether or not the signal is a signal instructing resetting (step S100). If the signal is an instruction to reset, the process returns to step S84 and repeats. On the other hand, if the instruction to end the process is input, the process ends.

As described above, according to the sixth embodiment, the trace pointer can be moved not only in the X-axis direction but also in the Y-axis direction. Therefore, the change amount of the Y coordinate when the trace pointer is moved at equal intervals with respect to the X coordinate and the change amount of the X coordinate when the trace pointer is moved at equal intervals with respect to the Y coordinate can be compared with each other. . In the sixth embodiment, an example has been described in which different graphs are displayed on the left and right split screens, but the same graph may of course be displayed.

When the trace pointer is moved along one of the coordinate axes, if the displayed graph is a polyvalent function with respect to the moving direction (variable), if the trace pointer reaches the extreme value, The moving direction after that may not be determined. For example, the right split screen 20b in FIG.
In, when the right trace pointer 40b is moved along the Y-axis direction, when the right trace pointer 40b reaches the minimum value, it cannot be moved in the Y-axis decreasing direction. Further, when the trace pointer is moved in the Y-axis increasing direction, it cannot be specified which of the left and right directions the trace pointer should be moved.

In order to prevent such a problem, one trace pointer is not limited to be displayed for one graph, and when there are a plurality of corresponding coordinates, the trace pointer should be displayed at all the positions. It may be set to. FIG. 21 is a diagram showing an example in which a plurality of trace pointers are displayed. In the figure, the right split screen 20b
Shows a cubic function having a maximum value and a minimum value. In this case, when the right and race pointers 40b are moved along the Y axis, there is a range in which there are two or three coordinates on the graph with respect to the Y coordinates of the right and race pointers 40b. is there. According to FIG. 21, the trace pointers 72a, 72b, and 72c are displayed at all positions on the graph corresponding to the value of the y coordinate accompanying the trace movement instruction. In this way, if the trace pointer is displayed at all the corresponding positions on the graph, even if the trace pointer reaches the extreme value, it is possible to determine in which direction the trace pointer should be moved after that. The display can be continued without performing.

[Seventh Embodiment] In the seventh embodiment, the graph display control device 1 performs processing for explaining the property of a linear function. Specifically, the display screen 2 is divided into two left and right parts, a mathematical expression (linear function) is displayed on the left divided screen 20a, and a linear function displayed on the left divided screen 20a is displayed on the right divided screen 20b. Display the graph of. Then, in response to an input instruction from the input unit 11, the value of the slope (coefficient of the variable x) or the y-intercept (independent term consisting of only constants) in the linear function displayed on the left split screen 20a is displayed in reverse. , The corresponding portion of the graph displayed on the right split screen 20b is displayed.

22 (a) and 22 (b) are diagrams showing an example of the display screen 2 in the seventh embodiment. According to the figure, the display screen 2 is divided into two left and right with a straight line 21 as a boundary. The left split screen 20a has a linear function (Y = 2X +
3) is displayed, and the left split screen 2 is displayed on the right split screen 20b.
The graph of the linear function displayed in 0a is displayed.

FIG. 22A shows an example of a screen when an instruction to display the tilt is input from the input unit 11. According to the figure, a linear function (Y = 2X + 3) whose inclination is displayed in reverse is displayed on the left split screen 20a. Further, the right divided screen 20b is displayed so that the inclination of the graph can be visually recognized. Specifically, the inclination on the graph is displayed by two line segments 80 so that the increase amount of Y with respect to the increase of X can be seen, and the increase amounts of the X coordinate and the Y coordinate can be numerically displayed on the right split screen 20b. It is displayed below.

When the instruction to display the inclination is input from the input unit 11, the CPU 10 inverts the inclination of the linear function displayed on the left split screen 20a and displays the increasing amount of y with respect to the increasing amount Δx of x. Display on the graph by minutes.
For example, when the inclination is 2, a line segment having a length corresponding to the increase amount “1” of x and a length corresponding to the increase amount “y” of y with respect to the increase amount of x based on the coordinate scale. Generate a line segment of Sa. Then, each generated line segment is displayed on the graph so that the amount of increase in y with respect to increase in x can be seen. Further, the amount of increase in x and the amount of increase in y are numerically displayed below the right split screen 20b.

FIG. 22B shows an example of a screen when the instruction to display the Y-section is input from the input unit 11.
As shown in the figure, a linear function (Y = 2X + 3) in which the Y-intercept is highlighted is displayed on the left split screen 20a. Also,
On the right split screen 20b, the pointer 85 is displayed at the position of the y-intercept on the graph, and the coordinates of the y-intercept are displayed. That is, when the instruction to display the y-intercept is input from the input unit 11, the CPU 10 reversely displays the value of the y-intercept of the left split screen 20a, calculates the coordinates of the Y-intercept in the screen coordinate system, and the coordinates thereof. Display the pointer on top. Further, the coordinates of the Y segment are displayed below the right split screen 20b.

The ROM in the seventh embodiment
17 is a graph drawing program 1 as shown in FIG.
70, the split display program 171, and the function data 17
3, a reverse display program 182, and an explanation display program 183 are stored. Here, the reverse display program 182 is a program for reversely displaying the designated coefficient or constant. Also, the explanation display program 183
Is a program for displaying a trace pointer or a coordinate on a graph for a designated coefficient or constant.

FIG. 24 shows C in the seventh embodiment.
6 is a flowchart for explaining a function explanation process by the PU 10. When the CPU 10 receives an instruction to execute the function explanation function in the graph mode from the input unit 11,
Graph display settings are made (step S100). That is, the setting is made to display the mathematical formula input on the left split screen 20a and display the graph of the mathematical formula input on the right split screen 20b. When a mathematical expression is input from the input unit 11 (step S102), the input mathematical expression is displayed on the left split screen 20a, and the input mathematical expression is drawn based on the graph drawing program 170, and the right split screen is displayed. It is displayed on 20b (step S103).

Then, the CPU 10, based on the inversion processing program 182 and the explanation display program 183,
Display processing of inclination and y-intercept is performed. That is, the CPU 10
Determines the instruction input from the input unit 11 (step S104), and if the input instruction is an instruction to display the tilt (YES), the tilt of the mathematical expression displayed on the left split screen 20a is displayed in reverse ( Step S105). Further, the inclination of the graph displayed on the right split screen 20b is displayed (step S106). On the other hand, when the instruction to display the y-intercept is input from the input unit 11 (NO), the y-intercept value of the mathematical formula displayed on the left split screen 20a is displayed in reverse (step S107). Further, with respect to the graph displayed on the right divided screen 20b, a pointer is displayed at the position of the Y intercept and the coordinates thereof are displayed (step S10).
8).

When the inversion processing of the designated coefficient and the display processing on the graph are completed, it is determined whether or not further processing is performed (step S109). For example, when an instruction to process the inclination or the y-intercept is input from the input unit 11, the process returns to step S104 and the process is repeated. On the other hand, when an instruction to end the function explanation process is input from the input unit 11, this process ends.

As described above, according to the seventh embodiment, the display screen 2 is divided and the formula is displayed on one side and the graph is displayed on the other side. Then, the designated coefficient or constant in the formula is highlighted and the corresponding portion on the graph is clearly displayed. Therefore, the user can grasp the meaning of each coefficient or constant included in the formula while comparing the formula and the graph.

In the seventh embodiment, the linear function is described as displaying the slope and y-intercept, but the linear function is not limited to the linear function. For example, regarding the trigonometric function, the relationship between the coefficient and the constant may be displayed in association with the graph. 25A to 25C are diagrams showing an example in which the seventh embodiment is applied to a trigonometric function. In the figure, on the left split screen 20a, the trigonometric function Y = Asin (aX /
2π + b) is displayed. (A) shows a display example when the coefficient A is selected. (B) is the coefficient (a / 2
The example of a display when (pi) is selected is shown. (C)
Indicates the case where the constant b is selected. As described above, it is needless to say that not only the linear function but also other functions may be displayed with the explanation of coefficients, constants, and terms by formulas and graphs.

[Eighth Embodiment] In the eighth embodiment, the graph display control device 1 executes differentiation / integration in response to a switching operation with respect to an inputted mathematical expression. Specifically, the display screen 2 is divided into two left and right, and a left divided screen 20
The mathematical expression is displayed in a and the graph is displayed in the right split screen 20b. Then, the formula displayed on the left split screen 20a, integral sign ∫ and, display of first derivative (d / dx), the display of the second derivative (d ² / dx
^The calculation symbols such as ² ) are switched and displayed according to the input instruction, and the graph on which the designated calculation is performed is switched and displayed on the right split screen 20b.

FIGS. 26 (a) to 26 (d) are views showing an example of the display screen 2 in the eighth embodiment. According to the figure, the display screen 2 is divided into two left and right by a straight line 21. The left split screen 20a displays a mathematical formula input from the input unit 11, and the right split screen 20b displays a graph of the input mathematical formula.

FIG. 26A is a diagram showing an example of the display screen 2 when a mathematical expression is input from the input unit 11. According to this figure, the formula y = sinx is displayed on the left split screen 20a, and the formula y = sinx is displayed on the right split screen 20b.
The graph of is displayed. That is, the CPU 10
When an expression is input from the input unit 11, the input expression is displayed on the left split screen 20a, and the input expression is drawn and displayed on the right split screen 20b.

FIG. 26B is a diagram showing an example of the display screen 2 when an instruction to execute integration is input from the input unit 11. According to the figure, the integration symbol ∫ is displayed in front of the right side (sinx) on the left split screen 20a. Also,
On the right split screen 20b, the lower limit value (LOWER) of the integration range,
The upper limit value (UPPER) and the integration result (∫dx = 2) are displayed, and the specified integration range of the graph (sinx) is filled. That is, the CPU 10 uses the input unit 11
When an instruction to execute integration is input from, the left split screen 2
The integration symbol is displayed on the right side of the expression displayed in 0a, and the input of the integration range is prompted. Then, when the integration range is input from the input unit 11, the value of the input integration range is displayed and the result of integration by the variable x is displayed. In addition, the specified range on the graph is filled.

FIG. 26C is a diagram showing an example of the display screen 2 when an instruction to execute differentiation is input from the input unit 11. According to the figure, on the left split screen 20a, the symbol (d / dx) of the first derivative is displayed in front of the right side (sinx). In addition, a graph when (sinx) is differentiated by x is displayed on the right split screen 20b. That is, the CPU
When the instruction to execute the first derivative is input from the input unit 11, 10 displays the symbol of the first derivative on the right side of the expression displayed on the left split screen 20a and differentiates the expression on the right side by the variable x. Draw and display the resulting graph.

FIG. 26D is a diagram showing an example of the display screen 2 when an instruction to execute the second derivative is input from the input unit 11. According to the figure, in the left split screen 20a,
The symbol of the second derivative (d ² / dx ² ) is displayed in front of the right side (sinx). Further, the graph after the secondary differentiation is executed is displayed on the right split screen 20b. That is, the CPU 10
When an instruction to execute the second derivative is input from the input unit 11, the symbol of the second derivative is displayed on the right side of the expression already displayed on the left split screen 20a, and the expression on the right side is set to the variable x. Draw and display the graph of the result of the second derivative.

The ROM according to the eighth embodiment
As shown in FIG. 27, the reference numeral 17 stores at least a graph drawing program 170, a divided display program 171, mathematical expression data, a function calculation program 184, and a calculation display program 185. Here, the function calculation program 184 is a program for the CPU 10 to perform a function calculation (for example, differentiation or integration) on the input mathematical expression. In addition, the calculation display program 185
It is a program for the CPU 10 to represent the integral range on the graph by painting it, display the integral range on the right split screen 20b, and display the integral symbol and the differential symbol.

FIG. 28 shows C in the eighth embodiment.
6 is a flowchart for explaining a function operation switching process by PU10. When the instruction to execute the function calculation switching process is input from the input unit 11, the CPU 10 sets the graph display (step S110). That is, according to the split display program 171, the display screen 2 is split into two right and left, and settings are made to display the formula on the left split screen 20a and the graph on the right split screen 20b. And the input unit 1
When a mathematical expression is input from 1 (step S111), according to the graph drawing program 170 and the function data 173,
Such a graph is created and displayed on the right split screen 20b (step S112).

Then, it is determined whether or not the differentiation / integration is executed for the input expression (step S113).
At this time, if an instruction to end the process is input from the input unit 11 (NO), the process ends. Also,
When an instruction to execute differentiation / integration is input from the input unit 11 (YES), the calculation content is determined (step S11).
4). At this time, if an instruction to execute integration is input, an integration symbol is displayed on the right side of the left split screen 20a (step S121). At this time, for example, (LOWER = ?, UPPER =?) Is displayed below the right split screen 20b to prompt the user to specify the integration range. When the lower and upper limits of the integration range are input from the input unit 11 (step S12)
2) The integration is executed for the specified integration range, and a graph (integration graph) in which the integration range is filled is created. Further, the result of integration in the designated integration range and the created integration graph are displayed on the right split screen 20b (step S123).

When an instruction to execute the first derivative is input in the calculation content determination of step S114, the symbol of the first derivative is displayed on the right side of the left split screen 20a (step S115). Further, the user is made to specify the coordinates for which the differential coefficient is obtained. That is, the user is made to specify which coordinate neighborhood of the designated mathematical expression should be displayed. Further, the user is urged to specify the increase / decrease amount Δx of the variable x (step S116). Then, the mathematical expression is first-order differentiated based on the input by the user. A graph is created and displayed for the result of the primary differentiation of the mathematical expression (step S117). At this time, the differential coefficient in the vicinity of the designated coordinate may be displayed below the right split screen 20b.

When an instruction to execute the secondary differentiation is input in the calculation content judgment of step S114, the symbol of the secondary differentiation is displayed on the right side of the left split screen 20a (step S118). Further, the user is urged to specify the coordinates to be obtained for the differential coefficient and the increase / decrease amount Δx of the variable x (step S119). In addition, a second-order differential graph relating to the input mathematical formula is created and displayed on the right divided screen 20b (step S120). At this time,
Below the right split screen 20b, the coefficient of the second derivative near the designated coordinate may be displayed.

As described above, according to the eighth embodiment, the differentiation / integration is executed for the already input mathematical expression in accordance with the switching operation. Moreover, since the mathematical expression first input is displayed on the left split screen 20a, the user always compares the original expression with the graph after the calculation of the integral or the differential and shows the correspondence relationship. You can judge.

[Ninth Embodiment] In the present ninth embodiment, the graph display control device 1 divides the display screen 2 into left and right parts, and at least two parts based on the inputted mathematical expression. Create a graph. Then, the left split screen 20a
And the two graphs respectively created on the right divided screen 20b are displayed in an overlapping manner. Then, one trace pointer is displayed for each divided screen to trace different graphs.

FIG. 29 is a diagram showing an example of the display screen 2 according to the ninth embodiment. According to the figure, the display screen 2 is divided into right and left with a straight line 21 as a boundary. The left split screen 20a and the right split screen 20b have the same 1
The same quadratic function as the next function is displayed. Further, although one trace pointer is displayed on each split screen, the left trace pointer 4 on the left split screen 20a is displayed.
0a is displayed on the linear function, and the right trace pointer 40b of the right split screen 20b is displayed on the quadratic function.
The coordinates of the corresponding trace pointer are displayed below each split screen. That is, left split screen 2
Below 0a, the coordinates of the left trace pointer 40a are
The right trace pointer 40b is located below the right split screen 20b.
The coordinates of are displayed respectively.

The CPU 10 moves the left trace pointer 40a and the right trace pointer 40b onto each graph according to the input instruction from the input unit 11. That is, the left trace pointer 40a is traced on a linear function, and the right and race pointers 40b are traced on a quadratic function. However, the CPU 10 arranges the left trace pointer 40a and the right trace pointer 40b on the same x coordinate, and moves them on the respective graphs in response to the input instruction.

The ROM according to the ninth embodiment
As shown in FIG. 3B, 17 is at least a graph drawing program 170 and a split display program 171.
, Trace processing program 172, and function data 17
3 and are memorized. However, the split display program 171 in the ninth embodiment includes a program for the CPU 10 to display the same graph on both left and right split screens. Further, the trace processing program 172 includes a program for causing the left trace pointer 40a and the right trace pointer 40b to trace different graphs.

FIG. 30 shows C in the ninth embodiment.
It is a flow chart for explaining trace processing (7) by PU10. From the input unit 11, the CPU 10
When an instruction to execute the dual graph mode and an instruction to display a plurality of graphs on the left and right split screens and to trace different graphs for each split screen are input, the dual graph setting is performed (step S130). However, in the present ninth embodiment, the CPU 10 divides the display screen 2 into two left and right parts and displays the same graph on each of the divided screens. For example, when the mathematical expression A and the mathematical expression B are input from the input unit 11 (step S131), the graph A based on the mathematical expression A and the graph B based on the mathematical expression B are created, and the left split screen 20a and the right split screen 20b are created. The graph A and the graph B are overlapped and displayed (step S132).

When the display of the graph A and the graph B is completed, the CPU 10 determines the initial value of the x coordinate of the left trace pointer 40a and the right trace pointer 40b. The initial value of the x coordinate may be determined according to an instruction input from the input unit 11, or may be determined as a default position. When the initial value of the x coordinate is determined, then y of the left trace pointer 40a and the right trace pointer 40b is determined.
Determine the coordinates. Specifically, first, the graph A is selected (step S133), and the y of the left trace pointer 40a is selected.
The coordinates and the Y coordinate are determined and displayed on the left split screen 20a (step S134). Further, the calculated coordinates of the mathematical formula coordinate system are displayed below the left split screen 20a (step S
135). Then, the graph B is selected (step S13
6), the y coordinate and Y coordinate of the right trace pointer 40b on the graph B are determined, and the right trace pointer 4b
0b is displayed on the right split screen 20b (step S13).
7). Furthermore, the coordinates in the mathematical formula coordinate system are set to the right split screen
It is displayed below b (step S138).

The CPU 10 determines whether or not to move each trace pointer in response to the signal input from the input section 11 (step S139). When not moving (NO), this processing ends. On the other hand, when a left / right key pressing signal is input from the input unit 11, the trace pointer moving process is started. First, left trace pointer 4
The amount of movement when 0a is moved by 1 dot in the designated direction is calculated (step S140). That is, the movement amount Δx in the mathematical formula coordinate system with respect to one dot interval in the screen coordinate system
Is calculated, the x coordinate in the formula coordinate system is determined based on the movement amount Δx, and y is determined based on the determined x coordinate and the formula.
Calculate the coordinate values. Further, the coordinates (X, Y) in the screen coordinate system are calculated based on the obtained coordinates (x, y).
Similarly, the movement amount of the right trace pointer 40b is calculated (step S141).

When the position of each trace pointer in the screen coordinate system is determined, the trace pointer is displayed on each divided screen (step S142). Further, the coordinates of the left trace pointer 40a and the coordinates of the right and the race pointer 40b in the mathematical formula coordinate system after the movement are displayed on each divided screen (step S143). Then, it is again determined whether or not to move the trace pointer (step S
144). For example, when the left and right keys are input from the input unit 11 (YES), the process returns to step S140 and the process is repeated. On the other hand, when an instruction to end the display process is input from the input unit 11, this process ends.

As described above, according to the ninth embodiment, a plurality of graphs are equally displayed on two split screens, and tracing is performed on different graphs on the two split screens. Therefore, the user can certainly compare the positional relationships of the graphs.

In the ninth embodiment, the case where two graphs are displayed on each split screen has been described as an example.
It is needless to say that the number is not limited to one and three or more graphs may be displayed. In such a case, the user may select a graph to be traced for each divided screen and execute the above process.

[Tenth Embodiment] In the tenth embodiment of the present invention, the graph display control device 1 displays a graph of an input expression and a solution thereof.
The characteristics of the graph such as the maximum value, the minimum value, the inflection point, the y-intercept, and the intersection of a plurality of graphs are displayed by a pointer or characters.
At this time, the display screen 2 is divided into two left and right, the same graph is displayed on the left and right divided screens, and different properties are displayed on the left and right divided screens.

FIG. 31 is a diagram showing an example of the display screen 2 in the tenth embodiment. According to the figure, the display screen 2 is divided into right and left with a straight line 21 as a boundary. In the left split screen 20a and the right split screen 20b, the same quadratic function (Y
= aX ² + b) is displayed. However, left split screen 20a
Shows the solution (ROOT) of the equation (0 = aX ² + b). That is, the pointer 110 is displayed at the position where the graph and the x axis intersect, and "ROOT" is displayed in the vicinity thereof. Further, a pointer 110 is provided below the left split screen 20a.
The coordinates of are displayed. On the other hand, the right split screen 20b displays the minimum value (MIN) of the quadratic function (Y = aX ² + b). That is, the pointer 111 is displayed at the position where the value of Y of the quadratic function is minimum, and "MIN" is displayed in the vicinity thereof. Further, the coordinates of the pointer 111 are displayed below the right divided screen 20b.

As described above, the CPU 10 according to the tenth embodiment divides the display screen 2 into left and right parts and generates a graph based on the mathematical formulas input from the input unit 11. Display on each split screen. However, one of the split screens displays a mathematical property A, the other split screen displays a mathematical property B, and so on. .

RO in the tenth embodiment
As shown in FIG. 32, M17 includes at least a graph drawing program 170, a split display program 171, and
The function data 173 and the explanation display program 186 are stored. However, in the explanation display program 186, C
The PU 10 includes a program for displaying equal graphs on the left and right split screens and performing different function display for each split screen.

FIG. 33 is a flow chart for explaining the explanation processing (1) of the CPU 10 in the tenth embodiment. When the instruction to execute the explanation process is input from the input unit 11, the CPU 10 sets the dual graph (step S150). That is, the display screen 2 is divided into two right and left, a mathematical expression input from the input unit 11 is created, and settings are made to simultaneously display the created graph on each divided screen. When a plurality of mathematical expressions are input from the input unit 11 (step S151), the CPU 10 creates each of the input graphs and displays them on the left split screen 20a and the right split screen 20b, respectively (step S152).

Further, when an instruction to display the mathematical properties of mathematical expressions and graphs is input from the input unit 11, the CPU 10 makes settings for executing the comment display based on the comment display program 186 (step S153). ). That is, the property A is displayed on the left split screen 20a, and the property B is displayed on the right split screen 20b. However, at this time, as shown in FIG. 34, the RAM 16 stores at least the mathematical expression storage area 160, the graph creation area 161, and the left calculation area 16 for calculating the mathematical properties of the graph displayed on the left split screen 20a.
3 and a right calculation area 164 for calculating mathematical properties of the graph displayed on the right split screen 20b.

Then, on the left split screen 20a, when a signal for instructing the type of property to be displayed for explanation is input from the input unit 11 (step S154), a mathematical expression is calculated for the specified property and the calculation result is calculated. Left split screen 20
It is displayed in a (step S155). Further, when the instruction of the property to be displayed for explanation is input from the input unit 11 on the right split screen 20b (step S156), a mathematical expression is calculated for the specified property and the calculation result is displayed on the right split screen 20b. (Step S157).

The left split screen 20a and the right split screen 20 have been described above.
When the process for b is completed, it is determined whether or not to display a different type of property (step S15).
8). For example, when an instruction to display different properties is input from the input unit 11 (YES), step S
Returning to 154, the process is repeated. On the other hand, when an instruction to end the process is input from the input unit 11, the process ends.

As described above, according to the tenth embodiment, the same mathematical expression is displayed on the left and right two split screens and the different properties are displayed. Therefore, the user can see a plurality of properties regarding the graph at one time by comparing the two split screens. Also, 1
It is possible to clarify which property is displayed on which screen unlike the case where multiple properties are displayed at once for the graph displayed on one display screen 2 and to show the property more clearly. .

[Eleventh Embodiment] In the eleventh embodiment, as in the tenth embodiment, the graph display control device 1 solves the inputted mathematical expression, the extreme value, and the eccentricity. Points, y-intercepts, intersections, etc. are displayed by a trace pointer or characters. However, in the eleventh embodiment, the display screen 2 is divided into two left and right parts, different graphs are displayed on the respective divided screens, and the same properties are displayed and described.

FIG. 35 is a diagram showing an example of the display screen 2 in the eleventh embodiment. According to the figure, the display screen 2 is divided into right and left by a straight line 21. The same linear function and quadratic function are displayed on the left split screen 20a and the right split screen 20b, respectively. However, on the left split screen 20a, a pointer 112 is displayed at the intersection of the linear function and the x-axis, and "ROOT" is displayed near the pointer 112. Furthermore, the left split screen 20a
The coordinates of the pointer 112 are displayed below.
In the right split screen 20b, a pointer 113 is displayed at the intersection of the quadratic function and the x coordinate, and "ROOT" is displayed near the pointer 113. Furthermore, right split screen 2
The coordinates of the pointer 113 are displayed below 0b.

As described above, in the eleventh embodiment,
The CPU 10 displays a plurality of equal graphs for the left and right split screens, respectively, and also displays the same property for different mathematical expressions for each split screen.

The RO according to the eleventh embodiment
As shown in FIG. 32, M17 includes at least the graph drawing program 170 and the split display program 171.
And function data 173 and a comment display program 186 for displaying the mathematical properties of the graph. In the comment display program 186 in the eleventh embodiment, the CPU 10 causes the left and right split screens to respectively display the same plurality of graphs, and further explains the same property with respect to different graphs for each split screen. A program for displaying is included.

FIG. 36 is a flow chart for explaining the explanation processing (2) of the CPU 10 in the eleventh embodiment. When the instruction to execute the explanation process (2) is input from the input unit 11, the CPU 10 sets the dual graph (step S160). That is, the display screen 2 is divided into two parts on the left and right, and settings are made so that two or more graphs are similarly overlapped and displayed on each of the two divided screens. When the mathematical expression A and the mathematical expression B are input from the input unit 11 (step S161), the CPU 10 receives the graph A based on the input mathematical expression A and the graph B based on the mathematical expression B.
Are respectively created, and the graph A and the graph B are displayed on each divided screen in an overlapping manner (step S162).

Then, the setting for displaying the description of each graph is performed (step S163). That is, the setting for displaying the explanation of the graph A on the left split screen 20a and the setting for displaying the explanation of the graph B on the right split screen 20b are performed. Again, the RAM 16 is shown in FIG.
As shown in FIG. 4, at least the formula storage area 160
A graph creation area 161, a left calculation area 163 for calculating mathematical properties of the graph displayed on the left split screen 20a, and a right calculation for calculating mathematical properties of the graph displayed on the right split screen 20b. Area 164
And.

First, the CPU 10 selects the graph A for the left split screen 20a (step S164) and the graph B for the right split screen 20b (step S1).
65). Furthermore, when a signal designating the mathematical property to be calculated is input from the input unit 11 (step S166), the mathematical formula A and the mathematical formula B are respectively calculated for the specified property. The result of the calculation for the mathematical formula A is displayed on the left split screen 20a (step S167), and the result of the analysis for the mathematical formula B is displayed on the right split screen 20b (step S168).

When the display of the properties of the corresponding graph for each divided screen is completed, it is determined whether or not to continue the process (step S169). That is, when an instruction to display a different property is input from the input unit 11, the process returns to step S164 and is repeated. On the other hand, when an instruction to end the process is input from the input unit 11, the process ends.

According to the eleventh embodiment, the same property is analyzed and displayed for different graphs. Therefore, the user can compare the differences of the same property of different graphs at one time. Therefore, it becomes possible to better understand the nature of the equation.

[Twelfth Embodiment] In the twelfth embodiment, the graph display control device 1 divides the display screen 2 into left and right parts and displays a graph and a trace pointer on each divided screen. Then, the trace pointer is traced on the graph. However, at that time, in the left split screen 20a, the left trace pointer 40a is moved on the graph at regular intervals based on the input of the left and right keys, whereas in the right split screen 20b, the right and the race pointer 40b are moved by the input pen 4.
Arbitrarily move on the graph based on the input of. That is, the left trace pointer 40a has to move sequentially from the initially designated initial position, whereas
The right and the race pointer 40b can change the movement start position at any time according to an input instruction from the input pen 4.

FIG. 37 is a diagram showing an example of the display screen 2 in the twelfth embodiment. According to the figure, the display screen 2 is divided into two left and right with a straight line 21 as a boundary, and the same graph is displayed on each of the left divided screen 20a and the right divided screen 20b. A trace pointer is displayed on the graph of each split screen. Left split screen 20
The left trace pointer 40a of "a" moves on the graph according to the input of the left and right keys. The right trace pointer 40b of the right split screen 20b moves on the graph according to the input of the left and right keys, and also arbitrarily moves on the graph according to the input instruction from the input pen 4.

Further, the RO in the twelfth embodiment
As shown in FIG. 38, M17 includes at least a graph drawing program 170, a split display program 171, and
Trace processing program 172 and function data 173
And the movement processing program 175 are stored. Here, the movement processing program 175 is a program for moving the position of the trace pointer according to the input instruction of the input pen 4.

FIG. 39 is a flow chart for explaining the trace processing 7 of the CPU 10 in the 12th embodiment. When the instruction to start this function is input from the input unit 11, the CPU 10 sets the dual graph (step S170). That is, the display screen 2 is divided into left and right, and settings are made to display the created graph on each divided screen. When a mathematical expression is input from the input unit 11 (step S171), the input mathematical expression is created and displayed on each of the left split screen 20a and the right split screen 20b (step S172).

Next, the CPU 10 causes the left split screen 20a to be displayed.
The initial position of the left trace pointer 40a is determined and the left trace pointer 40a is displayed at the determined position (step S173). At this time, the initial position may be determined based on an instruction input from the input unit 11, or may be determined as a default position. The coordinates of the left trace pointer 40a in the mathematical formula coordinate system are displayed below the left display screen 2 (step S174).

Similarly, the initial position of the right trace pointer 40b of the right divided screen 20b is determined. At this time,
The initial position of the right trace pointer 40b may be the same as the coordinate of the left trace pointer 40a, or may be completely different. Then, the right trace pointer 40b is displayed at the determined initial position on the right divided screen 20b (step S175). Further, the determined coordinates of the right trace pointer 40b are displayed on the right divided screen 20b (step S176).

When each trace pointer is displayed, it is determined whether or not the right trace pointer 40b is moved according to the input instruction of the input pen 4 (step S177). That is, when the position signal is not input from the position detection circuit 13 of the tablet 12 (NO), the process proceeds to step S180. On the other hand, when the position signal indicating the movement destination of the right trace pointer 40b is input from the position detection circuit 13 (YES), the right trace pointer 40b is moved to the designated position (step S178). Further, the coordinates of the moved right and the race pointer 40b in the mathematical formula coordinate system are calculated and displayed below the right divided screen 20b (step S179).

Then, it is determined whether or not to move each trace pointer according to the left and right keys (step S18).
0). At this time, if an instruction to end the process is input (NO), the process ends. On the other hand, when the left and right keys are input (YES), the CPU 10 moves each trace pointer in the designated direction. First, the left trace pointer 40a is moved by one dot in the designated direction (step S181), and the coordinates of the left trace pointer 40a in the mathematical formula coordinate system are calculated.

Similarly, the coordinates of the right trace pointer 40b in the screen coordinate system are determined. Then, the right trace pointer 40b is displayed at the determined position in the screen coordinate system (step S181). Further, the moving amount of the right trace pointer 40b is calculated (step S182),
The coordinates in the mathematical formula coordinate system are calculated, and the coordinates in the mathematical formula coordinate system of each trace pointer are displayed on each divided screen (step S184).

It should be noted that the CPU 10 determines whether or not to continue the processing (step S185). That is, when the instruction to move the trace pointer is input from the input unit 11 (YES), the process returns to step S177 to repeat the process. On the other hand, when no movement instruction is input from the input unit 11 or when an instruction to end is input, this processing ends.

As described above, according to the twelfth embodiment, in the two split screens, the trace pointers are displayed on both split screens and traced on the graph, but the trace pointer of one split screen is It is moved according to the input instruction from the input pen 4. Therefore, the user can directly move the trace pointer to a desired position without repeatedly pressing a predetermined key even when the distance from the trace start position to the desired position is long.

[Thirteenth Embodiment] In the thirteenth embodiment, the graph display control device 1 divides the display screen 2 into two parts and displays a graph and a trace pointer on each divided screen. Causes the trace pointer to be traced on the graph. At this time, the display screen 2 is not divided into left and right and horizontally, but is divided into two vertically.

[0209] Fig. 40 shows an example of the display screen 2 in the thirteenth embodiment. According to the figure, the display screen 2 is vertically divided into two parts with a straight line 21 as a boundary. On the upper split screen 120a, trigonometric functions and linear functions are displayed.
The inverse function of the quadratic function is displayed on the lower split screen 120b. In addition, a trace pointer 121a is displayed on each graph.
・ 121b ・ 121c ・ 121d are displayed.

When a mathematical expression is input from the input unit 11, the CPU 10 creates a graph based on each mathematical expression and displays it on each designated split screen. In addition, the trace pointer is displayed on each graph, and the trace pointer is moved to the right or left according to the input of the left / right key. When moving each trace pointer, the X coordinate of the trace pointer is moved one dot at a time in the designated direction. At that time, for a graph that is a multi-valued function with respect to the variable x, trace pointers are displayed for all points on the graph having the corresponding x coordinate.

The RO in the thirteenth embodiment
As shown in FIG. 3B, M17 includes at least the graph drawing program 170 and the split display program 17
1, the trace processing program 172, and the function data 1
73 and are stored. However, in the divided display program 171 in the thirteenth embodiment, the CPU 10
A program for dividing the display screen 2 into upper and lower parts and displaying them in response to an instruction input from the input unit 11 is included.

RA in the thirteenth embodiment
As shown in FIG. 3A, M16 has at least a mathematical expression storage area 160 and a graph creation area 161. However, when splitting the display screen 2 into upper and lower
U10 divides the mathematical expression storage area 160 into an area for storing mathematical expressions to be displayed on the lower split screen and an area for storing mathematical expressions to be displayed on the upper split screen, and the graph creating area 161 to the upper split screen. It is divided into an area for creating a graph to be displayed on the screen and an area for creating a graph to be displayed on the lower split screen.

FIG. 41 is a flow chart for explaining the trace processing (9) by the CPU 10 in the thirteenth embodiment. When the instruction to display the upper and lower split screens is input from the input unit 11, the CPU 10 receives the dual
Graph setting is performed (step S190). That is, the display screen 2 is divided into upper and lower parts, formulas input from the input unit 11 are created, and settings are made to display the upper and lower divided screens, respectively. Then, when a plurality of mathematical expressions are input from the input unit 11 (step S191), one by one
A graph based on one formula is created and displayed on the upper split screen and the lower split screen, respectively (step S192).

When the display of each graph is completed, a trace pointer is displayed for each graph on the upper split screen (step S193). Specifically, the initial value of the x coordinate is determined. Then, for each graph displayed on the upper split screen, a trace pointer is displayed at all the coordinates on the graph having the x coordinate. Further, the coordinates of each trace pointer in the mathematical expression coordinate system are displayed on the upper split screen (step S194).

Subsequently, it is determined whether or not the x coordinate of each upper trace pointer displayed on the graph of the upper split screen is included in the coordinate range of the lower split screen (step S195).
If not included (NO), the process proceeds to step S198. On the other hand, if included (YES), the trace pointer is displayed on the graph displayed on the lower split screen (step S196). Specifically, among the graphs displayed on the lower split screen, the trace pointer is displayed at all coordinates on the graph having the initial value of the x coordinate calculated in step S193. Then, the coordinates in the mathematical expression coordinate system of all the trace pointers displayed on the lower split screen are displayed on the lower split screen (step S197).

When the trace pointer is displayed on each graph, it is determined whether or not the trace pointer is moved (step S198). At this time, if an instruction to end the process is input from the input unit 11 (NO), the process ends. On the other hand, when the left / right key is input from the input unit 11 (YES), the trace pointer of the upper split screen is moved in the designated direction (step S).
199). Specifically, the amount of movement Δx in the mathematical coordinate system per dot in the X-axis direction on the upper split screen.
Is calculated, and the x coordinate of the upper trace pointer after movement in the mathematical formula coordinate system is calculated. Then, the determined x coordinate is substituted into each mathematical expression to obtain the y coordinate, and further, the coordinate (x,
The position in the screen coordinate system is determined based on y), and the trace pointer is displayed on each graph of the upper split screen (step S200).

Further, it is determined whether or not the x coordinate of the upper trace pointer in the mathematical coordinate system after movement is included in the coordinate range of the lower split screen (step S201). If not included (NO), the process proceeds to step S203. If it is included, the lower trace pointer is displayed at the coordinate having the same value as the x coordinate of the upper trace pointer on each graph displayed on the lower split screen (step S202).

When all trace pointers on the upper split screen and the lower split screen are moved and displayed, the coordinates of each trace pointer in the mathematical expression coordinate system are displayed (step S203). At this time, the coordinates of the trace pointer displayed on the upper split screen are displayed in the upper split screen. The coordinates of the trace pointer displayed on the lower split screen are displayed in the lower split screen.

When the movement of the trace pointer and the updating of the coordinates are completed, the CPU 10 determines again whether or not to move the trace pointer (step S20).
4). At this time, when an instruction to end this process is input from the input unit 11, this process ends. on the other hand,
When the left / right key pressing signal is input from the input unit 11, the process returns to step S199 to repeat the process.

As described above, according to the thirteenth embodiment, the display screen 2 is divided vertically instead of horizontally to display the graph. Therefore, when displaying a graph with little change in the Y-axis direction, in other words, when displaying a characteristic graph in the X-axis direction, it is possible to reliably display the characteristic portion of the graph.

[Fourteenth Embodiment] In the fourteenth embodiment, the graph display control device 1 divides the display screen 2 by the number of mathematical expressions input from the input unit 11, and separates each graph. Display in a separate window. that time,
The trace pointer is displayed on each graph and all trace pointers are moved together.

FIG. 42 is a diagram showing an example of the display screen 2 in the fourteenth embodiment. (A) shows an example of an input screen for inputting a mathematical formula, and (b) shows an example of creating and displaying a graph based on the inputted mathematical formula. According to (a), eight mathematical expressions are input. According to (b), as many windows as the number of input mathematical expressions are displayed. Also, one graph is displayed in each window. A trace pointer is displayed on each graph. That is, C
When an instruction to display a plurality of graphs in parallel is input from the input unit 11, the PU 10 displays windows as many as the input mathematical expressions, and displays the created graphs in each window. Also, in response to the input of the left and right keys,
Move all trace pointers on the graph in tandem.

RO in the fourteenth embodiment
As shown in FIG. 43A, the M17 stores at least a graph drawing program 170, a trace processing program 172, function data 173, and a multiple window display program 187. Here, the plural-window display program 187 is a program for the CPU 10 to display windows as many as the input mathematical expressions. The trace processing program 172 according to the fourteenth embodiment includes a program for simultaneously moving a plurality of trace pointers displayed in each window.

RA in the fourteenth embodiment
As shown in FIG. 43 (b), the graph creation area 161 of M16 is the same as the number of formulas stored in the formula storage area 160 for creating a graph (first formula area 165-1, 2 Numerical area 165-2, ..., The nth
Formula area 165-n). The CPU 10 displays the image data of the graph stored in each mathematical expression area on the display screen 2
Display in each window inside.

FIG. 44 is a flow chart for explaining the trace processing (10) by the CPU 10 in the fourteenth embodiment. When the CPU 10 receives an instruction to display a plurality of graphs simultaneously from the input unit 11,
Graph number screen division setting is performed (step S210). That is, display windows as many as the input formulas,
The setting for displaying the graph of 1 is performed for the window of 1. Then, when a plurality of mathematical expressions are input (step S211), the number of input mathematical expressions is recognized (step S212). Then, the same number of V-Windows as the number of recognized mathematical expressions is set (step S).
213). In addition, a variable range and a range are determined for each of the input mathematical formulas, a graph is created, and the graph is displayed (step S214).

When all the graphs are displayed, the trace pointer is displayed on each graph (step S215). Specifically, to determine the initial value x _O x coordinate of the trace pointer to be displayed on the graph displayed in the first window. Then, for other graphs, the trace pointer is displayed at the position of the x coordinate x _O on the graph. Further, the coordinates of all the displayed trace pointers in the mathematical expression coordinate system are displayed (step S216). However, the coordinates of the trace pointer displayed in the first window are
The coordinates of the trace pointer displayed in the second window in the first window are displayed in the second window ...

When the trace pointer is displayed for all the graphs, it is determined whether or not the trace pointer is moved (step S217). For example, when an instruction not to execute the trace is input from the input unit 11 (NO), this processing ends. On the other hand, the input unit 11
When the left or right key is input from (YES), the trace pointer displayed in each window is moved in the designated direction.

Specifically, first, the trace pointer on the designated graph (designated graph) is moved by one dot in the designated direction of the X axis (step S21).
8). At that time, the change amount Δx of the x coordinate of the mathematical formula coordinate system with respect to the one-dot interval in the screen coordinate system is calculated, and the coordinate (x, y) of the trace pointer is determined based on this change amount Δx and the mathematical formula. Furthermore, the determined coordinates (x,
The display position (X, Y) of the trace pointer in the screen coordinate system is determined based on y).

When the coordinates of the trace pointer on the designated graph are determined, the coordinates of the trace pointers on the other graphs are also determined and moved (step S
219). The coordinates of the trace pointer on the graph displayed in the other windows are determined based on the coordinates of the trace pointer on the specified graph. Specifically, in the formula corresponding to each graph, x of the trace pointer of the specified graph
By substituting the coordinates, the y coordinate of the trace pointer displayed on the corresponding graph can be determined. Furthermore, the determined coordinates (mathematical coordinate system) are converted to the screen coordinate system,
Determines where the trace pointer is displayed. And
The coordinates (mathematical coordinate system) of each trace pointer displayed on all graphs are updated and displayed below each window (step S220).

When the movement of the trace pointer and the updating process of the coordinates are completed, it is judged whether or not the trace pointer is further moved (step S221). For example, when an instruction to end the trace is input from the input unit 11 (NO), this processing ends. On the other hand, when the left / right key pressing signal is input from the input unit 11 (YES), the process returns to step S218 to repeat the process.

As described above, according to the fourteenth embodiment, a plurality of windows are displayed on the screen according to the number of formulas, and the graph of the inputted formula is individually displayed. Therefore, since the individual graphs are not displayed in an overlapping manner, the user can surely recognize each graph without being confused with other graphs.

[Fifteenth Embodiment] In the fifteenth embodiment, the graph display control device 1 displays a graph on each of the left and right divided screens, and displays each divided screen in accordance with the switching instruction. One of the graphs displayed on the display screen 2 is selected and displayed on the entire display screen 2, or the graph displayed on each divided screen is displayed on one coordinate system.

45 (a) to 45 (d) are diagrams showing an example of the display screen 2 in the fifteenth embodiment.
(A) is a figure which shows an example which displayed the graph created about several mathematical formulas by the dual graph setting on the left split screen 20a and the right split screen 20b, respectively. According to the same figure (a), the display screen 2 is divided into two left and right by a straight line 21, a linear function and a cubic function are displayed on the left divided screen 20a, and a quadratic function is displayed on the right divided screen 20b. Is displayed. The CPU 10 stores the image data of the graph in the storage medium 19 according to the instruction input from the input unit 11.
In the storage medium 19 and further in response to the read instruction.
The image data of the graph is read out and displayed again.

FIG. 45 (b) shows an example of the display screen 2 when the switch key is pressed by the user in the display state shown in (a). According to the figure, the display screen 2 displays a linear function and a cubic function. The display screen 2 shown in (b) is a graph in which the graph displayed in the left split screen 20a in (a) is displayed on the entire display screen 2.

FIG. 45 (c) shows an example of the display screen 2 when the user presses the switch key in the display state shown in FIG. 45 (b). According to the figure, a quadratic function is displayed on the display screen 2. The display screen 2 shown in (c) is a graph in which the graph displayed in the right split screen 20b in (a) is displayed on the entire display screen 2.

FIG. 45 (d) shows an example of the display screen 2 when the user presses the switch key in the display state shown in (c). According to the figure, on the display screen 2, a linear function, a cubic function and a quadratic function are displayed. The display screen 2 shown in (d) is one in which the graphs displayed in the left split screen 20a and the right split screen 20b in (a) are displayed in an overlapping manner on the entire display screen 2.

That is, the CPU 10 creates a graph based on the formula input from the input unit 11 and displays the graph on the left and right split screens, and switches the screen display according to the switching instruction input from the input unit 11. Ie 2
From the split display, one display of the left split screen 20a, one display of the right split screen 20b, left and right composite display, two split display, ...
The display is switched according to the switching instruction.

RO in the fifteenth embodiment
As shown in FIG. 46, M17 stores at least a graph drawing program 170, function data 173, a split display program 171, and a switching display program 189. Here, the switching display program 189 is C
A program for the PU 10 to store the image data of each graph displayed on the left and right split screens in the storage medium 19, read the read data again according to the read instruction, and execute the process of sequentially switching the display mode according to the switch instruction. Is.

FIG. 47 is a flow chart for explaining the switching display processing by the CPU 10 in the fifteenth embodiment. When the instruction to execute this function is input from the input unit 11, the CPU 10 sets the dual graph (step S230). That is, the display screen 2 is divided into left and right, and settings are made to display different graphs. Then, when a plurality of mathematical expressions are input from the input unit 11 (step S231), a graph based on each mathematical expression is created according to the graph drawing program 170 and the function data 173, and the graph is created on the left split screen 20a or the right split screen 20b, respectively. It is displayed (step S323).
The display state of the display screen 2 at this time is as shown in FIG. Further, when an instruction to save image data is input from the input unit 11, the image data of each displayed graph is saved in the storage medium 19 (step S23).
3).

Further, the CPU 10 receives an instruction to read image data from the input section 11 (step S23).
4) The image data stored in the storage medium 19 is read (step S235), the image (left image) for the left split screen 20a is displayed on the left split screen 20a, and the right split screen 2 is displayed.
The image for 0b (right image) is displayed on the right split screen 20b (step S235). At this time, the display state shown in FIG.

Now, in the display state of step S235, the instruction input from the input unit 11 is determined (step S236). At this time, if an instruction to cancel the graph display is input (cancellation), this processing ends. On the other hand, when the pressing signal of the switching key is input from the input unit 11 (switching), the left image is displayed on the entire display screen 2 (step S237). Specifically, of the image data read from the storage medium 19, the image data corresponding to the left split screen 20a is read, and the image data is enlarged and converted from the coordinate scale of the left split screen 20a to the coordinate scale of the entire display screen 2. To do. Then, the converted image data is displayed on the entire display screen 2. The display state of the display screen 2 at this time corresponds to the state of FIG.

The CPU 10 determines the instruction input from the input unit 11 in the display state shown in FIG. 45 (b), that is, in the state where the left image is fully displayed on the display screen 2 (step S238). At this time, if an instruction to cancel the graph display is input (cancellation), this processing ends. On the other hand, when the pressing signal of the switching key is input from the input unit 11 (switching), the right image is displayed on the entire display screen 2 (step S239). Specifically, the storage medium 19
The image data corresponding to the right divided screen 20b is read from the image data read from the image data, and the image data is enlarged and converted from the coordinate scale of the right divided screen 20b to the coordinate scale of the entire display screen 2. Then, the converted image data is displayed on the entire display screen 2. The display state of the display screen 2 at this time corresponds to the state of FIG.

Further, in the display state shown in FIG. 45C, that is, in the state where the right image is displayed on the entire display screen 2, the CPU 10 determines the instruction input from the input unit 11 (step S240). ). At this time, if an instruction to cancel the graph display is input (cancellation), this processing ends. On the other hand, when the pressing signal of the switching key is input from the input unit 11 (switching), the left image and the right image are overlapped and displayed on the coordinate scale of the entire display screen 2 (step S241). Specifically, the coordinates in the mathematical coordinate system of the left image and the coordinates in the mathematical coordinate system of the right image are aligned and the graphs are superimposed (combined), and the coordinate scale of the split screen is changed to the coordinate scale of the display screen 2. Enlarge and convert. Then, the converted composite graph is displayed on the entire display screen 2. The display state of the display screen 2 at this time is as shown in FIG.
This corresponds to the state shown in (d).

Further, the CPU 10 determines the instruction input from the input section 11 in the display state shown in FIG. 45D, that is, in the state where the graphs of the left image and the right image are displayed in an overlapping manner ( Step S242). At this time, if an instruction to cancel the graph display is input (cancellation), this processing ends. On the other hand, when the pressing signal of the switch key is input from the input unit 11, the process returns to step S235 to repeat the process. That is, the split screen display as shown in FIG. 45A is performed again.

As described above, according to the fifteenth embodiment, by operating the switching key, the split screen display, the one-sided display of each split screen, and the graph composite display are switched and displayed. Therefore, the user can easily see the graph of the input mathematical expression on any screen display by the switching operation without repeatedly inputting the same mathematical expression.

[Sixteenth Embodiment] In the sixteenth embodiment, the graph display control device 1 stores the image data of the created graph in the storage medium 19 and responds to the reading instruction from the user. To redisplay the graph. At this time, not only the image data of the graph is stored in the storage medium 19, but also information for tracing the trace pointer (trace information) is stored together with the image data. Therefore, the user can temporarily stop the display of the graph, perform other work, and then display the graph again for tracing.

In the following, the case where the display screen 2 is divided into left and right and the graph is displayed on each of the divided screens will be described as an example, but the present invention is not limited to this. For example,
As shown in the fourteenth embodiment, it goes without saying that the display screen 2 may be divided according to the number of inputted mathematical expressions and the graphs based on the mathematical expressions may be displayed in parallel. is there. The trace pointer may be moved by any of the methods described in the first to sixth and twelfth to fifteenth embodiments.

FIGS. 48 (a) and 48 (b) show the first example, respectively.
It is a figure which shows the example of a display in 6th Embodiment. (A)
Shows an example of the display screen 2 when the graph is created and displayed, and (b) shows an example of the display screen 2 when the graph is displayed again. According to (a) and (b), the display screen 2 is divided into two right and left, and different graphs are displayed respectively. Specifically, a linear function is displayed on the left split screen 20a, a quadratic function is displayed on the right split screen 20b, and a trace pointer is displayed on each graph. The X-coordinates of the trace pointers are the same, and they move in conjunction with each other according to the input instruction. The coordinates of the trace pointer are displayed below each split screen.

As described above, the CPU 10 creates and displays a graph to be displayed on the left split screen 20a and a graph to be displayed on the right split screen 20b based on the mathematical expression input from the input unit 11. To do. In addition, the trace pointer is displayed on each graph, and the trace pointer is moved in response to the input of a direction key or the like. Furthermore, when an instruction to save image data is input from the input unit 11, the image data displayed on each split screen is stored in the storage medium 1.
Store in 9. At this time, the trace information is also stored at the same time. Here, the trace information is information for tracing the trace pointer on the redisplayed graph.

FIG. 49 is a diagram showing an example of trace information. (A) shows the trace information 150a of the graph displayed on the left split screen 20a, and (b) shows the right split screen 2
The trace information 150b of the graph displayed on 0b is shown. According to the figure, in the trace information, the coordinates (X, Y) in the screen coordinate system and the coordinates (x, y) in the mathematical formula coordinate system are stored in association with each other. Coordinates in the screen coordinate system indicate points on the graph at 1-dot intervals in the X-axis direction. In other words, each X coordinate of the screen coordinate system included in the trace information indicates a value of 1 dot interval.

When the redisplayed graph is traced, the CPU 10 determines the display position of the trace pointer according to the coordinates of the screen coordinate system included in the trace information, and sets the coordinates of the formula coordinate system included in the trace information to the trace value. Display as. More specifically, an appropriate coordinate is extracted as an initial position from the coordinates of the screen coordinate system included in the trace information, the trace pointer is displayed, and the coordinate of the corresponding mathematical expression coordinate system is displayed as the trace value. .
When a left / right key pressing signal is input from the input unit 11, the coordinates of the corresponding screen coordinate system in the designated direction are read and the trace pointer is moved. Further, the coordinates in the mathematical formula coordinate system corresponding to the coordinates in the screen coordinate system after the movement are read out and displayed as trace values.

The information stored as the trace information need not be limited to the coordinate information as shown in FIG. For example, the value of the movement amount Δx in the mathematical formula coordinate system, which corresponds to the one-dot interval in the screen coordinate system, and the mathematical formula may be stored as trace information. In this case, when the CPU 10 redisplays the graph and executes the trace, the CPU 10 constantly displays the trace pointer display position based on the coordinates of the trace pointer in the mathematical formula coordinate system, the change amount Δx for one dot, and the mathematical formula. And a trace value (that is, coordinates in the mathematical formula coordinate system).

It should be noted that the RO in the sixteenth embodiment
As shown in FIG. 50A, M17 includes at least the graph drawing program 170 and the split display program 17
1, the trace processing program 172, and the function data 1
73, a redisplay program 190, and a trace information generation program 191 are stored. Here, the redisplay program 190 is a program for the CPU 10 to temporarily store the image data of the graph once displayed in the RAM 16, and trace information is generated and stored in the storage medium 19 in association with the image data. And a program for redisplaying the graph in response to an input instruction, and a program for tracing on the redisplayed graph. The trace information generation program 191 is a program for the CPU 10 to generate trace information.

RA in the sixteenth embodiment
As shown in FIG. 50B, the M16 has at least a mathematical expression storage area 160, a graph creation area 161, and a trace information generation area. Here, the trace information generation area means a storage area used when the CPU 10 generates the trace information. In addition, the formula storage area 160 includes a left formula area 160a for storing a formula inputted to the left split screen 20a and a right formula area 160b for storing a formula inputted to the right split screen 20b. And, including. Graph creation area 1
Reference numeral 61 includes a left graph area 161a used when creating a graph displayed on the left split screen 20a and a right graph area 161b used when creating a graph displayed on the right split screen 20b.

FIG. 51 is a flow chart for explaining the trace processing (11) by the CPU 10 in the sixteenth embodiment. When an instruction to execute the dual graph mode is input from the input unit 11, the CPU 10 sets the dual graph (step S250).
That is, the screen is divided into two parts on the left and right, and settings are made to display different graphs on the respective divided screens. Then, when a mathematical expression is input from the input unit 11 (step S2
51), a graph based on the mathematical formula is created and displayed on the corresponding divided screen (step S252). That is, the graph displayed on the left split screen 20a and the graph displayed on the right split screen 20b
Create and display the graph to be displayed in and.

When an instruction to save the image data of the graph and the trace information is input from the input unit 11 while the graph is displayed, the CPU 10 generates the trace information for each graph (step S253). Then, the image data of each divided screen and the generated trace information are associated and stored in the storage medium 19 (steps S254, S).
255).

When the instruction to re-display the saved image data of the graph is input from the input unit 11 after the storage in the storage medium 19 (step S256), the CPU 10
The image data and the trace information stored from the storage medium 19 are called (steps S257 and S258). And
Graphs are displayed on the left split screen 20a and the right split screen 20b based on the image data, and a trace pointer is displayed on each graph. First, the initial position of the left trace pointer 40a is determined and displayed (step S
259). Next, the coordinates of the mathematical expression coordinate system corresponding to the initial position (screen coordinate system) of the left trace pointer 40a are read from the trace information and displayed below the left split screen 20a (step S260).

When the display of the left trace pointer 40a is completed, the right and race pointers 40b are displayed. that time,
It is determined whether or not the coordinates (mathematical coordinate system) of the left trace pointer 40a are included in the movement range of the right and the race pointer 40b (step S261). If not included, step S264 is performed without displaying the right and the race pointer 40b.
Move to. On the other hand, when the coordinates of the left trace pointer 40a are included in the moving range of the right and race pointers 40b, the right and race pointers 40 are determined based on the trace information.
b is displayed at a position equal to the x coordinate of the left trace pointer 40a (step S262). Furthermore, the coordinates of the right and the race pointer 40b in the mathematical formula coordinate system are set to the right divided screen 20.
It is displayed below b (step S263).

When the display of each trace pointer is completed,
The CPU 10 determines whether to move the trace pointer (step S264). At this time, the input unit 11
When an instruction to end the trace process is input from, this process ends. On the other hand, when the left and right keys are input from the input unit 11, the left trace pointer 40a
Is moved by one dot in the designated direction (step S2
65). That is, the 1-dot left trace pointer 40a is moved in the designated direction according to the trace information. In addition, based on the coordinates (mathematical coordinate system) after the movement of the left trace pointer 40a, the right and the race pointers 40
The display position of b is determined according to the trace information (step S266) and displayed on the right split screen (step S26).
7).

When the display of each trace pointer after the movement is completed, the coordinates of each trace pointer in the formula coordinate system are determined based on the trace information and displayed below the corresponding divided screens (step S268). Now, when the movement of the trace pointer is completed, the CPU 10 determines again whether or not to move the trace pointer (step S269). At this time, if an instruction to end the trace process is input from the input unit 11, this process ends. On the other hand, when a left / right key pressing signal is input from the input unit 11, the process returns to step S265 and is repeated.

As described above, according to the sixteenth embodiment, the image data of the created and displayed graph and the information for tracing the graph are stored in the storage medium 19. Then, the image data stored in response to the input instruction is read out, the graph is displayed again on the display screen 2, and the trace is re-executed based on the stored trace information. Therefore, it is possible to display the designated image quickly without the need to perform the process of drawing the graph or recalculate the trace value (coordinates of the trace pointer). Further, the user can save the labor of inputting the mathematical expression and can operate the graph display control device 1 comfortably by the smooth image switching.

[Seventeenth Embodiment] In the seventeenth embodiment, the graph display control device 1 stores the image data of the created and displayed graph in the storage medium 19, and the storage medium 19 according to the input instruction. Read from and display again. At that time, the graphs based on the plurality of image data stored in the past are displayed in an overlapping order in the order of reading.

52 (a) to 52 (d) are diagrams showing display examples in the seventeenth embodiment. FIG. 52 (a)
FIG. 6 is a diagram showing an example of creating and displaying a graph based on an input mathematical formula. The display screen 2 is divided into two right and left with a straight line 21 as a boundary, and a linear function is
Quadratic functions are displayed on the right split screen 20b. Further, a trace pointer is displayed on each graph, and the coordinates (mathematical coordinate system) of the corresponding trace pointer are displayed below each divided screen. CPU10
When the instruction to store the image data is input to the storage medium 19, the trace information for moving each trace pointer is generated and stored in the storage medium 19 in association with the image data.

FIG. 52 (b) is a diagram showing an example in which, apart from the graph display shown in FIG. 52 (a), a graph is created and displayed for the input mathematical expression. According to the same figure (b), the display screen 2 is divided into two left and right with a straight line 21 as a boundary, and a cubic function is displayed on the left split screen 20a and a linear function is displayed on the right split screen 20b. ing. Further, a trace pointer is displayed on each graph, and the coordinates (mathematical coordinate system) of the corresponding trace pointer are displayed below each divided screen. When the instruction to store the image data in the storage medium 19 is input, the CPU 10 generates trace information for moving each trace pointer, and stores it in the RAM 16 in association with the image data. As described above, according to the seventeenth embodiment, the graph display control device 1 stores a plurality of image data according to an instruction from the user.

FIG. 52 (c) is a diagram showing an example in which the graphs shown in FIGS. 52 (a) and 52 (b) are overlaid and displayed again. According to FIG. 6C, the left split screen 20a displays the linear function and the cubic function displayed on the left split screen 20a shown in FIGS. On the screen 20b, the quadratic function and the linear function displayed on the right divided screen 20b shown in (a) and (b) are displayed in an overlapping manner. Display bands 141 and 142 are displayed below the display screen 2, and the coordinates of the trace pointer on the previously read graph are displayed in the upper display band 141 (mathematical coordinate system).
Is displayed, and the coordinates of the trace pointer of the graph read later are displayed in the lower display band 142.

That is, when an instruction to read out a plurality of image data is input, the CPU 10 reads out the image data in the order in which the instruction to read out is input, and sequentially displays them on the display screen 2. Regarding the display band for displaying the coordinates of each trace pointer, the display band corresponding to the previously read graph is scrolled upward, and the display band corresponding to the currently read graph is displayed below it.

FIG. 52D is a diagram showing an example when the trace pointer is moved. According to the figure, the trace pointer of the graph (a) read earlier does not move, but only the trace pointer of the graph (b) read later moves. That is, the CPU 10 moves only the trace pointer on the graph called later in response to the input instruction.

RO in the seventeenth embodiment
As shown in FIG. 50 (a), M17 is at least
Graph drawing program 170 and split display program 1
71, a trace processing program 172, function data 173, a redisplay program 190, and a trace information generation program 191 are stored. However, this 17th
The redisplay program 190 in the embodiment of
U10 reads out two or more designated image data,
The program includes a program for displaying it on the display screen 2 in an overlapping manner and a program for displaying the coordinates of the trace pointer displayed on the graph in the display band. The trace information generation program 191 is a program for generating trace information.

Further, as shown in FIG. 50B, the RAM 16 has at least a mathematical expression storage area 160, a graph creation area 161, and a trace information generation area 166.
Have and. The formula storage area 160 is the left formula area 1
The graph creation area 161 includes a left graph area 161a and a right graph area 161b.

FIG. 53 is a flow chart for explaining the trace process (12) by the CPU 10 in the seventeenth embodiment. First, the CPU 10 sets the dual graph in response to the input instruction (step S2).
70). That is, the screen is divided into two parts on the left and right, and settings are made to display different graphs on the respective divided screens. At this time, the CPU 10 causes the split display program 171
The display screen 2 is divided into left and right in accordance with. Further, when the input screen is displayed, the display screen 2 is divided into the left and right parts, and the left split screen 20a and the right split screen 20b are set so that mathematical expressions can be input. When a mathematical expression is input from the input unit 11 after such setting (step S
271), graph drawing program 170, function data 1
73, a graph based on the input mathematical formula is created and displayed on the corresponding divided screens (step S
272).

When the instruction to store the displayed graph is input, the CPU 10 generates trace information according to the trace information generation program 191 (step S2).
73) and stores it in the storage medium 19 in association with the image data (steps S274 and S275).

Subsequently, the CPU 10 receives an instruction to redisplay the graph from the input unit 11 (step S27).
6) The image data of the designated graph and the trace information are read from the storage medium 19 (step S277,
S278), and display on the display screen 2. Then, based on the read trace information, the left trace pointer 40a is displayed on the graph displayed on the left split screen 20a (step S279). At this time, the left trace pointer 40
The position where a is displayed may be the default position or the position designated by the input unit 11. When the left trace pointer 40a is displayed, a display band for displaying the coordinates (mathematical coordinate system) of the left trace pointer 40a is displayed below the left split screen 20a (step S280).

Next, the right and the race pointer 40b are displayed on the graph of the right split screen 20b. At this time, it is determined whether the coordinates of the left trace pointer 40a in the mathematical formula coordinate system are included in the moving range (the mathematical formula coordinate system) of the left trace pointer 40a (step S281). If not included, the process moves to step S284 without displaying the right and the race pointer 40b. On the other hand, when the coordinates of the left trace pointer 40a are included in the moving range of the right and race pointers 40b, the right and race pointers 4 are displayed on the right split screen.
0b is displayed (step S282). At this time, the right and the race pointer 40b are displayed at a position equal to the x coordinate of the left trace pointer 40a. Also, right split screen 2
A display band indicating the coordinates (graph coordinate system) of the right and the race pointer 40b is displayed below 0b (step S28).
3).

When the display of each trace pointer is completed,
The signal input from the input unit 11 is determined (step S
284). At this time, if an instruction to execute the trace is input from the input unit 11, the process proceeds to step S292. On the other hand, when an instruction to read another graph is input from the input unit 11, the CPU 10 calls the specified image data and trace information from the storage medium 19 and displays them on the previously displayed graph. (Step S285). That is, on the graph displayed on the left split screen 20a, the left split screen 20a of the read image data is displayed.
The graph corresponding to is synthesized. Also, the right split screen 20b
A graph corresponding to the right divided screen 20b of the read-out image data is combined with the graph displayed in FIG.

Then, the left trace pointer 40a is displayed on the graph (readout graph) written afterward on the left split screen 20a (step S286). At this time, the display position of the left trace pointer 40a may be a position designated by the input unit 11 or a default position. Further, the display band of the coordinates already displayed below the left split screen 20a is scrolled upward, and the display band of the coordinate of the left trace pointer 40a displayed this time is displayed below it (step S287).

Then, the right and the race pointer 40b are displayed on the graph (readout graph) written afterward on the right divided screen 20b. At this time, it is determined whether the coordinates of the left trace pointer 40a are included in the moving range of the right and race pointers 40b (step S288). If not included, the process moves to step S284 without displaying the right and the race pointer 40b. On the other hand, if included, the right and race pointers 40b are displayed on the read graph of the right split screen 20b.
Is displayed (step S289). However, it is displayed so as to be equal to the x coordinate of the left trace pointer 40a.
Further, the display band of the coordinates displayed below the right split screen 20b is scrolled upward, and the display band of the coordinates of the right and the race pointer 40b displayed this time is displayed below the display band (step S290).

When display of each trace pointer is completed,
The CPU 10 determines the signal input from the input unit 11 (step S291). At this time, if an instruction to further read the image data is input from the input unit 11, the process returns to step S285 and is repeated. When an instruction to end this process is input, this process ends. Alternatively, when an instruction to execute the trace is input from the input unit 11, the trace process is started.

If an instruction to start tracing is input in step S291, the left trace pointer 40a on the read graph (that is, the last read graph) of the graphs displayed on the left split screen 20a is moved. It is moved in response to the input instruction (step S292). Specifically, the coordinates (X, Y) of the screen coordinate system when the left trace pointer 40a is moved by one dot along the X axis.
And the corresponding coordinates (x, y) of the mathematical formula coordinate system are read from the trace information. Further, with the movement of the left trace pointer 40a, the movement destinations of the right and race pointers 40b (the coordinates of the screen coordinate system and the coordinates of the mathematical formula coordinate system) are determined based on the trace information (step S293). Then, the right and the race pointer 40b are displayed at the determined position (step S294), and the coordinate display of each trace pointer is updated to the value after movement (step S295).

When the trace pointer moving process is completed, the CPU 10 determines whether or not to move the trace pointer again (step S296). At this time, when an instruction to end the trace process is input from the input unit 11, this process ends. On the other hand, when a left / right key pressing signal is input from the input unit 11, step S
Returning to 292, the processing is repeated.

As described above, according to the seventeenth embodiment, image data of a plurality of graphs and trace information are stored in association with each other. Then, when an instruction to overlap and display is input, the specified graph is sequentially overwritten and displayed without deleting the previously displayed graph and trace pointer. Therefore, it is possible to reliably display the positions of the plurality of trace pointers corresponding to the plurality of graphs.

In the seventeenth embodiment, the case where the display screen 2 is divided into two right and left has been described as an example. However, the present invention is not limited to this, and is shown in, for example, the thirteenth embodiment. As a matter of course, it may be divided into upper and lower parts, or may be applied to a plurality of divided screens as shown in the fourteenth embodiment.

In the seventeenth embodiment, the trace pointer on the previously displayed graph is fixedly displayed regardless of the input instruction.
It need not be limited to this. That is, in response to the input instruction, the trace pointers of the previously called graph and the subsequently called graph may of course be moved at the same time.

[0283]

According to the graph display control apparatus of the first aspect, the graphs are displayed on the first display screen and the second display screen, respectively, and the respective graphs are interlocked and traced.
Therefore, it becomes possible to more clearly show the positional relationship between the individual graphs.

According to the graph display control device of the second aspect, the statistical graph can be displayed on the first display screen and the second display screen. In other words, it is possible to display statistical graphs on the first display screen and the second display screen, respectively, and trace the statistical graphs in conjunction with each other.

According to the graph display control device of the third aspect, the trace value is displayed along with the trace. Therefore, the user can more clearly grasp the positional relationship between the graphs.

According to the graph display control device of the fourth aspect, the enlarged or reduced graph of the graph displayed on the first display screen is displayed on the second display screen, and the graph displayed on each display screen is displayed. Trace together. Therefore, the user can observe the graph from a micro viewpoint and a macro viewpoint after clarifying the positional relationship.

According to the graph display control device of the fifth aspect, in the invention of the fourth aspect, one of the trace values of the graphs displayed on the first display screen and the second display screen is the most accurate. Display the trace value. Therefore, the user can see a finer positional relationship.

According to the graph display control device of the sixth aspect, the first graph and the second graph are displayed on the first display screen and the second display screen, respectively. Then, the first graph is traced on the first display screen, and the second graph is traced on the second display screen. Therefore, the user can surely see the positional relationship of each graph.

According to the graph display control device of the seventh aspect, the image data of the graph and the trace data are stored. Further, the stored image data is read to redisplay the graph, and the redisplayed graph is traced based on the read trace data. Therefore, it is possible to save the trouble of redrawing the graph and re-executing the trace processing.

According to the graph display control device of the eighth aspect, when a plurality of stored image data of the graph are read out and displayed again, the individual graphs are displayed in an overlapping manner. Therefore, the user can simultaneously display a plurality of graphs displayed in the past in an overlapping manner and grasp the positional relationship between the graphs.

According to the graph display control device of the ninth aspect, when displaying a plurality of graphs in a redisplay of the graphs, the trace value of each graph is displayed. Therefore, the user can more accurately grasp the positional relationship between the plurality of graphs by the numerical values (coordinate values).

According to the graph display control device of the tenth aspect, when tracing the graph displayed on the first display screen and the second display screen, tracing is performed along different coordinate axes for each display screen. . Therefore, the user can grasp the positional relationship of each graph from different viewpoints.

According to the graph display control device of the eleventh aspect, a plurality of graphs are displayed on the first display screen and the second display screen is displayed.
Display the trace value of each graph on the display screen of. Therefore, the user can surely see the positional relationship of all the graphs at once without selecting and switching the displayed plural graphs.

According to the graph display control apparatus of the twelfth aspect, the graph displayed on the first display screen is traced and the pointer is displayed at the position designated by the input means on the second display screen. . Therefore, the user can trace the graph in order on one display screen and quickly display the pointer at a desired position on the other display screen.

According to the graph display control device of the thirteenth aspect, it is possible to change the layout configuration of the first display screen and the second display screen. Therefore, the user can view the graph in a better state by changing the layout configuration according to the characteristics and shape of the displayed graph.

According to the graph display control apparatus of the fourteenth aspect, a graph consisting of three variables is converted into a two-dimensional coordinate system having two variables as coordinate axes to generate a two-dimensional graph. Then, the respective two-dimensional graphs are displayed on different display screens, and are linked and traced. Therefore, the user
With respect to the graph of three variables, the positional relationship can be grasped more accurately.

According to the graph display control device of the fifteenth aspect, individual graphs can be displayed on a plurality of display screens. For example, by setting the same number of display screens as the number of graphs to be displayed, the user can see each graph without confusion with other graphs.

According to the graph display control device of the sixteenth aspect, a mathematical expression is displayed on the first display screen, a part of the mathematical expression is highlighted in response to external input, and the second display screen is displayed. The graph of the mathematical formula is displayed and the display corresponding to the inverted contents of the mathematical formula is performed. Therefore, the user can easily understand the configuration of the mathematical formula and the graph based on the contents shown in the graph.

According to the graph display control apparatus of the seventeenth aspect, the mathematical expression is displayed on the first display screen, and the operation symbol is displayed in response to the external input. On the other hand, on the second display screen, a graph of the mathematical formula concerned or a graph of the mathematical formula subjected to the designated calculation is displayed. Therefore, the user can associate and understand the mathematical expression, the operation symbol, and the change in the graph.

According to the graph display control apparatus of the eighteenth aspect, different functions are displayed for the graph displayed on the first display screen and the graph displayed on the second display screen. . Therefore, the user can save the trouble of repeating the procedure for displaying the function of the graph many times.

According to the graph display control device of the nineteenth aspect, different graphs are displayed on the first display screen and the second display screen, respectively, and the same function display is performed. Therefore, the user can save the trouble of repeating the procedure for displaying the function of the graph many times.

According to the graph display control device of the twentieth aspect, it is possible to switch between the graph display mode by one display screen and the graph display mode by the divided display screen. Therefore, the user can easily see the graph on various screens by the switching operation.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a graph display control device.

FIG. 2 is a diagram showing an example of an internal configuration of a graph display control device.

FIG. 3A is a diagram showing an example of a storage form of a RAM. (B) is a figure showing an example of a memory form of ROM.

FIG. 4 is a diagram showing an example of a storage form of a RAM.

FIG. 5 is a flowchart illustrating a trace process 1.

FIG. 6 is a diagram showing an example of divided display.

FIG. 7 is a diagram showing an example of a display screen according to the first embodiment.

FIG. 8 is a diagram showing an example of a display screen according to the second embodiment.

FIG. 9 is a diagram showing an example of a storage form of a ROM in the second embodiment.

FIG. 10 is a flowchart illustrating a trace process 2.

FIG. 11 is a diagram showing an example of a display screen according to the third embodiment.

FIG. 12 is a flowchart illustrating a trace process 3.

FIG. 13 is a diagram showing an example of a display screen according to the fourth embodiment.

FIG. 14 is a diagram showing an example of a storage form of a ROM in the fourth embodiment.

FIG. 15 is a flowchart illustrating a trace process 4.

FIG. 16 is a diagram showing an example of a storage form of a RAM according to a fourth embodiment.

FIG. 17 is a diagram showing an example of a display screen according to the fifth embodiment.

FIG. 18 is a flowchart illustrating a trace process 5.

FIG. 19 is a diagram showing an example of a display screen in the sixth embodiment.

FIG. 20 is a flowchart illustrating a trace process 6.

FIG. 21 is a diagram showing an example in which a plurality of trace pointers are displayed.

FIG. 22 is a diagram showing an example of a display screen in the seventh embodiment.

FIG. 23 is a diagram showing an example of a storage form of a ROM in the seventh embodiment.

FIG. 24 is a flowchart illustrating a function description process.

FIG. 25 is a diagram showing a modification of the seventh embodiment.

FIG. 26 is a diagram showing an example of a display screen in the eighth embodiment.

FIG. 27 is a diagram showing an example of a storage form of a ROM in the eighth embodiment.

FIG. 28 is a flowchart for explaining a function calculation switching process.

FIG. 29 is a diagram showing an example of a display screen in the ninth embodiment.

FIG. 30 is a flowchart illustrating a trace process 7.

FIG. 31 is a diagram showing an example of a display screen in the tenth embodiment.

FIG. 32 is a diagram showing an example of a storage form of a ROM in the tenth embodiment.

FIG. 33 is a flowchart for explaining an explanation process 1.

FIG. 34 is a diagram showing an example of a storage form of a RAM according to the tenth embodiment.

FIG. 35 is a diagram showing an example of a display screen in the eleventh embodiment.

FIG. 36 is a flowchart for explaining an explanation process 2.

FIG. 37 is a diagram showing an example of a display screen in the twelfth embodiment.

FIG. 38 is a diagram showing an example of a storage form of ROM in the twelfth embodiment.

FIG. 39 is a flowchart for explaining a trace process 8.

FIG. 40 is a diagram showing an example of a display screen in the thirteenth embodiment.

FIG. 41 is a flowchart illustrating a trace process 9.

FIG. 42 is a diagram showing an example of a display screen in the fourteenth embodiment.

FIG. 43 (a) is an RO in the fourteenth embodiment.
FIG. 3B is a diagram showing an example of a storage form of M, and FIG.

FIG. 44 is a flowchart for explaining the trace processing 10.

FIG. 45 is a diagram showing an example of a display screen in the fifteenth embodiment.

FIG. 46 is a diagram showing an example of a storage form of ROM in the fifteenth embodiment.

FIG. 47 is a flowchart for explaining a switching display process.

48 (a) and 48 (b) are diagrams showing an example of a display screen in the sixteenth embodiment.

FIG. 49 is a diagram showing an example of trace information.

FIG. 50A is a ROM in the sixteenth embodiment.
2B is a diagram showing an example of a storage form of RAM, and FIG.

FIG. 51 is a flowchart illustrating a trace process 11.

FIG. 52 is a diagram showing an example of a display screen in the seventeenth embodiment.

FIG. 53 is a flowchart illustrating a trace process 12.

[Explanation of symbols]

1 Graph display controller 2 Display screen 3 input keys 4 input pen 10 CPU 11 Input section 12 tablets 13 Position detection circuit 14 Display 15 Display drive circuit 16 RAM 17 ROM 18 storage 19 storage media

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Claims (20)

[Claims] 1. A graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen, wherein the first display screen and the second display screen are provided. Against the display screen of
A graph display unit for displaying a graph, a trace unit for tracing the graph displayed on the first display screen, and a trace unit linked to the graph displayed on the second display screen, respectively. A graph display control device comprising. 2. The graph display control device according to claim 1, wherein the graph which the graph display means can display includes a statistical graph. 3. The graph display control device according to claim 1, wherein the trace means simultaneously displays the trace value of each graph. 4. The graph display control device according to claim 1, wherein the graph display means displays the second display screen with respect to the second display screen.
A graph display control device, wherein a part of a graph displayed on the first display screen is enlarged or reduced. 5. The graph display control device according to claim 4, further comprising means for displaying a highly accurate trace value among the trace values of the graphs displayed on the first display screen and the second display screen. And a graph display control device further comprising: 6. The graph display control device according to claim 1 or 2, wherein the graph display means includes the first display screen and the second display screen.
And at least a first graph and a second graph are simultaneously displayed on the display screen, and the trace means displays the first graph on the first display screen and the second graph on the second display screen. A graph display control device characterized by tracing on a graph in conjunction with each other. 7. The graph display control device according to claim 1, wherein image data of the graph displayed on the first display screen and the second display screen by the graph display means,
Storage means for storing trace data traced by the tracing means, and image data stored by the storage means is read out to display a graph on each of the first display screen and the second display screen. In addition, a graph display control device comprising: a redisplay unit that reads out trace data and traces the trace data. 8. The graph display control device according to claim 7, wherein the redisplay unit is configured to display the first display screen and the second display screen.
A graph display control device, wherein a graph based on the image data stored in the storage means is displayed in an overlapping manner on the graph being displayed on the display screen. 9. The graph display control device according to claim 8, wherein the redisplay unit displays a trace value for each of a plurality of graphs to be displayed in an overlapping manner when performing tracing based on the trace data. A graph display control device characterized by the above. 10. A graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen, wherein the first display screen and the second display screen are displayed. 2 for each display screen
A graph display means for displaying a graph of a dimensional coordinate system; a graph displayed on the first display screen is traced along a first axis direction; and a graph displayed on the second display screen is a second axis. A graph display control device comprising: a tracing unit that traces along a direction. 11. A graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen, wherein: Graph display means for displaying a plurality of graphs and individual graphs displayed on the first display screen are traced along one coordinate axis, and trace values of the individual graphs are displayed on the second display screen as a table. A graph display control device comprising: 12. A graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen, wherein the first display screen and the second display screen are displayed. Against the display screen of
Graph display means for displaying a graph, trace means for tracing the graph displayed on the first display screen, input means for the user to specify a position on the second display screen, and the input A means for displaying a pointer at a position designated by the means, and a graph display control device. 13. The graph display control device according to any one of claims 1 to 12, wherein a screen layout changing unit that changes a layout configuration of the first display screen and the second display screen of the display unit. A graph display control device further comprising: 14. A graph display control device for displaying a graph on at least one display screen among display parts having at least three display screens, wherein a graph consisting of three variables is used, and two variables included in the graph are coordinate axes. Generating means for converting into a two-dimensional coordinate system to generate a two-dimensional graph, and means for displaying the two-dimensional graph generated by the generating means on different display screens for each combination of the variables. And a trace unit that traces the two-dimensional graph in association with each other. 15. A display unit having n display screens,
In a graph display control device for displaying a graph on at least one display screen, a means for displaying a graph for each of the n display screens and a graph displayed on the n display screens are interlocked with each other. A graph display control device comprising: 16. A graph display control device for displaying a graph on at least one of the display units having a first display screen and a second display screen, wherein a mathematical expression is displayed on the first display screen. A display means for displaying a graph based on the mathematical formula on the second display screen, and a part of the mathematical formula displayed on the first display screen in reverse display in response to an external input, and 2. A graph display control device comprising: means for performing a display corresponding to the reverse display on the graph displayed on the second display screen. 17. A graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen, wherein a mathematical expression is displayed on the first display screen. And a means for displaying a graph based on the mathematical formula on the second display screen, a computing means for deciding a type of computation in response to an external input, and applying the decided computation to the mathematical expression, and the computing means. Generating means for generating a graph based on the calculation result; and a calculation symbol corresponding to the calculation determined by the calculating means, which is displayed on the first display means with the mathematical expression, and generated by the generating means. Means for displaying a graph on the second display means, and a graph display control device comprising: 18. A graph display control device for displaying a graph on at least one display screen of a display unit having a first display screen and a second display screen, wherein the first display screen and the second display screen are displayed. Graph display means for displaying the same graph on each of the display screens, and the first display screen and the second display screen,
A graph display control device, comprising: a function display unit for displaying different functions for the graph. 19. A graph display control device for displaying a graph on at least one display screen of a display section having a first display screen and a second display screen, wherein the first graph is displayed on the first display screen. For displaying a second graph on the second display screen, and the first display screen and the second display screen,
A graph display control device, comprising: a function display unit that displays the same function for the first graph and the second graph. 20. A graph display control for displaying a graph on at least one of the divided display screens, comprising a display unit capable of dividing the one display screen into at least a first divided display screen and a second divided display screen. In the apparatus, a generation unit that generates at least a first graph and a second graph, the first graph is displayed on the first split display screen, and the second graph is displayed on the second split display screen. A mode, a mode in which the first graph is displayed on the entire first display screen, a mode in which the second graph is displayed on the entire first display screen, and the first graph and the second graph are overlapped. A graph display control device comprising: a unit for switching between a mode for displaying on the entire display screen of 1 above.