JP2004213139A - Electronic device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable plotting of data including an undefined variable to improve convenience, in an electronic device having a graph display function. <P>SOLUTION: A user sets a value of display range setting data on a display range, a scale or the like, inputs a numerical formula, and inputs a command for directing drawing of a graph, a table, an increase/decrease table or the like. When a CPU 10 decides that the display range setting data or the numerical formula inputted by the user includes the undefined variable, the CPU 10 calculates a value temporarily substituted for the undefined variable. The CPU 10 substitutes the calculated value for the display range setting data or the numerical formula, calculates graph data, table data or increase/decrease table data, and displays the graph, the table, the increase/decrease table or the like on a display part 40. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic device having a graph display function and a program.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an apparatus having a drawing function of drawing a geometric figure is known. For example, there has been known a scientific calculator (hereinafter, referred to as a “functional calculator”) having abundant functions such as an equation calculation, a matrix operation, and a complex number operation, and a financial calculation function and a statistical function. This scientific calculator can display, for example, the calculation results of various technical calculations using a calculation function in the form of a graph, and can draw a figure of an input expression. Therefore, it is widely used in educational sites to study the relationship between character data such as mathematical formulas and graphs and figures.
[0003]
In addition, the above-described scientific calculator has a function of setting a coordinate range (hereinafter, referred to as a “display range”) for displaying a graph to a value desired by a user when displaying the graph. Is known (for example, refer to Patent Document 1).
[0004]
[Patent Document 1]
JP-A-61-261780
[0005]
[Problems to be solved by the invention]
By the way, when a user calculates a function, the user does not always perform the calculation with a specific numerical value in mind. For example, assuming a mathematical expression including a variable (hereinafter, referred to as “undefined variable”) a for which a specific numerical value is not specified other than the axis variables X and Y, such as “Y = aX ＾ 2”, The calculation is performed by imagining the shape of the graph.
[0006]
However, in a device such as a scientific calculator, when a mathematical expression or the like using an undefined variable is input, the calculation cannot be executed because the specific value of the undefined variable is unknown, and an error occurs. For example, in the following case.
[0007]
(1) When the coordinate range (display range) is set using undefined variables
In a conventional scientific calculator, when a graph is drawn, its coordinate range (display range) can be set. However, setting a coordinate range using undefined variables resulted in an error.
(2) When entering a mathematical expression (graph expression) that includes undefined variables
Since the specific value of the undefined variable was unknown, it was an error that the numerical operation could not be performed and an error occurred, and the graph could not be drawn. Of course, it was not possible to draw a graph by a method of specifying a numerical condition that an undefined variable can take. In addition, since an undefined variable is included, the value of the undefined variable is not uniquely determined, and an increase / decrease table cannot be created.
(3) Creating list data by inputting table conditions including undefined variables
When entering a formula and further entering a table condition for creating list data, even if the formula does not include an undefined variable, if the table condition contains an undefined variable, the list data Could not be created.
[0008]
Thus, the present invention provides an electronic device having a graph display function that enables execution of drawing of a graph, creation of list data, and the like, even when an input using an undefined variable is performed, so that the calculation can be performed at the time of calculation. The purpose is to support the user's thinking and improve usability.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the electronic device according to claim 1 is
A coordinate range input means (for example, an input unit 20 shown in FIG. 2) for inputting a coordinate range for displaying a graph;
Determining means (for example, CPU 10 shown in FIG. 2; step S105 shown in FIG. 5) for determining whether or not an undefined variable is included in the coordinate range input by the coordinate range input means;
When the determination unit determines that the coordinate range includes an undefined variable, the control unit sets a temporary value to the undefined variable and displays a graph for the coordinate range in which the set temporary value is substituted. (For example, CPU 10 shown in FIG. 2; step S112 shown in FIG. 5)
It is characterized by having.
[0010]
The program according to claim 12,
On the computer,
A coordinate range input function for inputting a coordinate range for displaying a graph,
A determination function of determining whether or not an undefined variable is included in the coordinate range input by the coordinate range input function;
When it is determined that the undefined variable is included in the coordinate range by the determination function, a provisional value is set to the undefined variable, and a graph is displayed for the coordinate range in which the set provisional value is substituted. Graph display control function to perform
Is realized.
[0011]
According to the first or twelfth aspect of the present invention, when an undefined variable is included in a coordinate range for displaying a graph, a temporary range is assigned to the undefined variable to set a coordinate range, and the graph is displayed. Can be displayed. That is, when a specific numerical value is not specified as the coordinate range, the graph can be displayed by specifying the coordinate range. Therefore, it is possible to support the user's thinking at the time of calculation and to improve the convenience of the electronic device having the graph display function.
[0012]
According to another aspect of the present invention, in the electronic device according to the first aspect, a control for displaying a trace pointer that moves in accordance with a moving operation on a graph that is display-controlled by the graph display control unit. (For example, the CPU 10 shown in FIG. 2; steps S114 to S117 shown in FIG. 5)
When the discriminating means determines that the coordinate range includes an undefined variable, a control for calculating the position of the trace pointer in the coordinate range using the undefined variable and displaying the position as a coordinate value. (For example, CPU 10 shown in FIG. 2; step S114 shown in FIG. 5)
May be provided.
[0013]
According to the second aspect of the present invention, when an undefined variable is included in a coordinate range for displaying a graph, the graph is displayed in a coordinate range in which a temporary value is assigned to the undefined variable, and then the graph is displayed. The coordinate value corresponding to the position of the trace pointer can be calculated and displayed.
[0014]
Further, as in the invention according to claim 3, in the electronic device according to claim 1 or 2,
Command input means (for example, an input unit 20 shown in FIG. 2) for inputting a graph-based command for uniquely specifying a graph expression;
A second determining means (for example, as shown in FIG. 2) for determining whether or not the same undefined variable is included in the graph-based command input by the command input means and the coordinate range input by the coordinate range input means. CPU 10 shown; step SS210 shown in FIG. 9);
Further comprising
The graph display control means is means for performing control for displaying a graph of a graph specified by a graph command input by the command input means, and includes the same undefined variable by the second determination means. When it is determined that the tentative value has been substituted, it is determined based on predetermined accommodation conditions whether or not the graph of the graph formula falls within the coordinate range to which the tentative value has been substituted. And a means for controlling to display the graph of the graph by resetting the provisional value so as to satisfy the accommodation condition (for example, CPU 10 shown in FIG. 2; steps S211 to S216 shown in FIG. 9). May be.
[0015]
According to the third aspect of the present invention, when the same undefined variable is included in the graph-based command and the coordinate range, the value to be assigned to the undefined variable is reset as appropriate so that the graph can be included in the coordinate range. Can be displayed.
[0016]
Further, as in the invention according to claim 4, in the electronic device according to any one of claims 1 to 3,
Scale value input means (for example, an input unit 20 shown in FIG. 2) for inputting a scale value representing a value of one unit of the scale;
Third determining means (for example, CPU 10 shown in FIG. 2; step S305 shown in FIG. 13) for determining whether or not an undefined variable is included in the scale value input by the scale value input means;
When it is determined by the third determining means that the scale value includes an undefined variable, a temporary value is set for the undefined variable, and the scale is displayed with the scale value obtained by substituting the set temporary value. Scale display control means (for example, CPU 10 shown in FIG. 2; step S308 shown in FIG. 13)
May be provided.
[0017]
According to the fourth aspect of the present invention, when an undefined variable is included in a scale value, it is possible to display a scale by substituting a temporary value for the undefined variable.
[0018]
The electronic device according to claim 5,
An electronic device with a graph display function that performs control to display a graph of a graph expression including an undefined variable,
Display control means (for example, CPU 10 shown in FIG. 2; steps S406 to S408 shown in FIG. 17) for setting a temporary value to the undefined variable and performing control for displaying a graph of the graph formula in which the set temporary value is substituted. )When,
Condition setting means (for example, CPU 10 shown in FIG. 2; step S410 shown in FIG. 17) for setting conditions of possible values of the undefined variables by a predetermined operation input;
By calculating a value that satisfies the condition set by the condition setting means, resetting a new value to the undefined variable, and substituting the reset value, the graph of the graph formula is replaced with a new graph. Update display control means (for example, CPU 10 shown in FIG. 2; steps S410 to S413 shown in FIG. 17) for performing update display control;
It is characterized by having.
[0019]
The program according to claim 13,
On the computer,
A display control function of setting a provisional value to an undefined variable included in the graph expression and performing control to display a graph of the graph expression in which the set provisional value is substituted;
A condition setting function for setting a condition of a possible value of the undefined variable by a predetermined operation input;
By calculating a value that satisfies the condition set by the condition setting function, resetting a new value to the undefined variable, and substituting the reset value, the graph of the graph formula is replaced with a new graph. An update display control function for controlling the update display on the
Is realized.
[0020]
According to the invention as set forth in claim 5 or 13, when a graph expression includes an undefined variable, a temporary value is assigned to the undefined variable, a graph is displayed, and a condition is set. The graph can be updated and displayed.
[0021]
Further, as in the invention according to claim 6, in the electronic device according to claim 5,
The condition setting unit is configured to execute a movement instruction operation or a deformation instruction operation on a graph display-controlled by the display control unit, based on a graph expression specified by the graph after the instruction operation, to obtain a possible value of the undefined variable. (For example, the CPU 10 shown in FIG. 2; step S410 shown in FIG. 17).
[0022]
According to the invention as set forth in claim 6, when an undefined variable is included in a graph expression, a temporary value is assigned to the undefined variable, and the graph is displayed. The condition of the value that the undefined variable can take can be set accordingly.
[0023]
Further, as in the invention according to claim 7, in the electronic device according to claim 5,
The condition setting means is configured to include an operation input means (for example, CPU 10 shown in FIG. 2; steps S509 and S510 shown in FIG. 22) for setting a condition of a possible value of the undefined variable by an operation input. Is also good.
[0024]
According to the invention described in claim 7, it is possible to set the condition of a value that can be taken by the undefined variable by the operation input means.
[0025]
Further, as in the invention according to claim 8, in the electronic device according to claim 5 or 7,
When it is determined that the value satisfying the condition set by the condition setting means has a certain range, the update display control means updates and displays the graph having the line width as the new graph as the new graph. It may be configured to have means for controlling (CPU 10 shown in FIG. 2; step S612 shown in FIG. 26).
[0026]
According to the invention described in claim 8, it is possible to set a graph condition and display a graph having a line width representing all the graphs satisfying the set condition.
[0027]
The electronic device according to claim 9,
Formula input means (for example, input unit 20 shown in FIG. 2) for inputting a formula,
A table condition input unit (for example, the input unit 20 shown in FIG. 2) for inputting a table condition for creating a list table of the mathematical expression input by the mathematical expression input unit;
Determining means (for example, CPU 10 shown in FIG. 2; step S705 shown in FIG. 30) for determining whether an undefined variable is included in the table condition input by the table condition input means;
When the determination unit determines that the table condition includes an undefined variable, a list table is created and displayed as a character expression obtained by substituting the undefined variable into the mathematical expression. List table display control means (for example, CPU 10 shown in FIG. 2; step S710 shown in FIG. 30)
It is characterized by having.
[0028]
The program according to claim 14,
On the computer,
A formula input function for inputting formulas,
A table condition input function for inputting a table condition for creating a list table of formulas input by the formula input function,
A determination function for determining whether an undefined variable is included in the table condition input by the table condition input function,
When it is determined by the determination function that the table condition includes an undefined variable, a list table is created and displayed as a character expression obtained by substituting the undefined variable into the mathematical expression. List table display control function to control
Is realized.
[0029]
According to the invention described in claim 9 or 14, when an undefined variable is included in a table condition for creating a list table based on a mathematical expression, a character expression in which the undefined variable is substituted into the mathematical expression Can be created and displayed. That is, the list table can be displayed even if the table condition includes an undefined variable.
[0030]
Further, as in the invention according to claim 10, in the electronic device according to claim 9,
The table condition input means has a range input means (for example, the input unit 20 shown in FIG. 2) for inputting a range of the list table to be created,
The list table display control means, when omitting a part of the range of the list table input by the range input means and displaying the list table, displays an ellipsis sign (for example, an ellipsis symbol SH shown in FIG. 35B). ), And has an omission sign display control means (for example, CPU 10 shown in FIG. 2; step S810 shown in FIG. 34).
Cursor display control means (for example, as shown in FIG. 2 shown in FIG. 2) for performing a control to move on the list table, the display of which is controlled by the list table display control means, in accordance with a moving operation and to display a cursor for indicating an element of the list table. CPU 10; steps S813 and S815 shown in FIG. 34);
When the cursor is positioned on the abbreviated sign, the general expression display control means (for example, CPU 10 shown in FIG. 2: Steps S814 and S816),
May be further provided.
[0031]
According to the tenth aspect, when a table condition for creating a list table based on a mathematical expression includes an undefined variable, a character expression in which the undefined variable is substituted for the mathematical expression is used as an element. Can be created, and a part of the range of the created list table can be omitted and displayed. In addition, elements in the omitted range can be represented by a general formula. That is, even if an undefined variable is included in the table condition, it is possible to display the list table and to display the elements of the displayed portion with a part omitted.
[0032]
The electronic device according to claim 11,
Formula input means (for example, input unit 20 shown in FIG. 2) for inputting a formula,
Determining means (for example, CPU 10 shown in FIG. 2; step S905 shown in FIG. 38) for determining whether an undefined variable is included in the mathematical expression input by the mathematical expression input means;
An increase / decrease table creating means for creating an increase / decrease table of the mathematical expression according to the types of poles and inflection points that the undefined variable can take when the mathematical expression includes an undefined variable; (For example, the CPU 10 shown in FIG. 2; step S907 shown in FIG. 38);
Increase / decrease table display control means (for example, CPU 10 shown in FIG. 2; steps S909 and S911 shown in FIG. 38) for controlling to display each increase / decrease table created by this increase / decrease table creation means;
It is characterized by having.
[0033]
The program according to claim 15,
On the computer,
A formula input function for inputting formulas,
A determination function for determining whether or not an undefined variable is included in a formula input by the formula input function;
An increase / decrease table creation function for creating an increase / decrease table for the mathematical expression according to the types of poles and inflection points that can be taken by the undefined variable when it is determined by the determination function that the mathematical expression includes an undefined variable. When,
An increase / decrease table display control function for controlling to display each increase / decrease table created by the increase / decrease table creation function;
Is realized.
[0034]
According to the invention of claim 11 or 15, when an undefined variable is included in a mathematical expression, an increase / decrease table is created and displayed according to the types of poles and inflection points that can be taken by the undefined variable. Can be. That is, it is possible to create and display an increase / decrease table based on a mathematical expression including an undefined variable.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, a case will be described in which the present invention is applied to a graph scientific calculator which is a kind of electronic apparatus having a graph display function, but the present invention is not limited to this.
[0036]
FIG. 1 is a diagram illustrating an example of the appearance of a graph scientific calculator (hereinafter, simply referred to as a “scientific calculator”) 1 to which the present invention is applied. As shown in FIG. 1, the scientific calculator 1 includes a display 2, a key group 3, and an input pen 4. The keys constituting the key group 3 are assigned unique functions, and the user operates the scientific calculator 1 by pressing these keys. In addition, a tablet (touch panel) 30 described later is integrally provided on the display 2, and the user can operate the scientific calculator 1 by a touch operation on the display 2 using the input pen 4. .
[0037]
In addition, the scientific calculator 1 includes, for example, a calculation application program (hereinafter, appropriately referred to as “calculation application”) for realizing a calculation function for calculating a calculation formula, a table, a list, and the like, and a graph for realizing a graph drawing function. An application program (hereinafter, appropriately referred to as a “graph application”) and the like are installed.
Hereinafter, with reference to the drawings, first to ninth embodiments of the scientific calculator 1 will be described.
[0038]
1. First embodiment
In the first embodiment, when data input on a screen for setting a graph display range of a graph application (hereinafter referred to as a “display range setting window RW”) includes an undefined variable, Assign temporary values to variables. Further, when an undefined variable is included in the graph formula input from the key group 3 or the like by the user, a temporary value is substituted for the undefined variable. Thereby, the display range of the graph display screen (hereinafter, referred to as “graph window GW”) of the graph application is set, and the graph is drawn. Further, when a trace execution instruction is input, control is performed to display a trace pointer on a graph and to display coordinates of a trace position.
[0039]
1.1 Internal configuration
FIG. 2 is a block diagram illustrating an example of the internal configuration of the scientific calculator 1 according to the first embodiment. As shown in FIG. 1, the scientific calculator 1 includes a CPU 10, an input unit 20, a tablet 30, a position detection circuit 31, a display unit 40, a display drive circuit 41, a RAM 50, a ROM 70, a storage device 90, and a storage medium 100. You.
[0040]
The CPU 10 executes a process based on a predetermined program according to the input instruction, performs an instruction to each functional unit, transfers data, and the like, and controls the scientific electronic calculator 1 as a whole. Specifically, the CPU 10 reads a program stored in the ROM 70 in response to an operation signal input from the input unit 20 or the tablet 30, and executes processing according to the program. Then, the processing result is stored in the RAM 50, and a display signal for displaying the processing result is appropriately output to the display drive circuit 41, and the corresponding display information is displayed on the display unit 40.
[0041]
The input unit 20 is an input device provided with keys necessary for inputting numerical values, mathematical expressions, etc., selecting functions, and the like, and outputs to the CPU 10 a pressing signal of a pressed key and the like. Key inputs on the input unit 20 include, for example, an instruction to start various applications, execution of graphic drawing processing, input of mathematical expressions, execution of arithmetic processing, termination of processing and release of mode, pointer operation, various selection operations, and the selection operation Input means, such as an instruction for confirming the setting. The input unit 20 corresponds to the key group 3 shown in FIG.
[0042]
In addition, the scientific calculator 1 includes a tablet 30 as a touch panel as an input device. The tablet 30 is an input device in which a device such as an indicating pen (corresponding to the input pen 4 shown in FIG. 1) for indicating a position on the display unit 40 and a device for sensing the position of the indicated display unit 40 are combined. It is. The position detection circuit 31 connected to the tablet 30 detects the position coordinates specified by the tablet 30. If the tablet 30 is used, the position on the display unit 40 can be specified in detail, and the input means in the input unit 20 can be realized by the touch operation of the display unit 40 using the tablet 30.
[0043]
The display drive circuit 41 controls the display unit 40 based on a display signal input from the CPU 10 to display various screens. The display unit 40 includes an LCD (Liquid Crystal Display), an ELD (Electro Luminescent Display), or the like, and displays, for example, a display screen shown in FIG. The display unit 40 corresponds to the display 2 in FIG. 1 and is formed integrally with the tablet 30.
[0044]
The RAM 50 includes a storage area (memory) for temporarily storing various processing programs executed by the CPU 10 and data related to the execution of these programs. FIG. 3 is a diagram illustrating a configuration of the RAM 50 according to the present embodiment.
[0045]
According to the figure, the RAM 50 stores the display range setting data 51 for specifying the display range input in the display range setting window RW, and when the display range setting data 51 includes an undefined variable, The display range provisionally substituted value data 51a, which is a value temporarily calculated as a value to be substituted, the graph data 52, which is dot data of a graph rendered in the graph window GW, and graph-type data for rendering a graph (graph-type data) Data) 52a, graph formula temporary substitution value data 52b that is a value calculated as a value temporarily substituted for the undefined variable when the graph formula data 52a includes an undefined variable, and coordinate data of the trace position on the graph And an area for storing each data of the coordinate value data 53.
[0046]
FIG. 4 is a diagram showing the configuration of the ROM 70. According to the figure, the ROM 70 stores an initial program for performing various initial settings, hardware inspection, and loading necessary programs. The CPU 10 sets the operating environment of the scientific calculator 1 by executing the initial program when the power of the scientific calculator 1 is turned on.
[0047]
The ROM 70 also stores various application programs such as a calculation application and a graph application, various processing programs related to the operation of the scientific calculator 1 such as various setting processes and various arithmetic processes, and various functions provided in the scientific calculator 1. Stores programs and data. In particular, in the present embodiment, a first graph drawing processing program 71 is stored.
[0048]
The first graph drawing processing program 71 is a program for realizing the first graph drawing processing (see FIG. 5). The first graph drawing processing is realized by the CPU 10 executing the first graph drawing processing program 71.
[0049]
The storage device 90 has a storage medium 100 that stores programs, data, and the like. The storage medium 100 is configured by a magnetic, optical storage medium, or a semiconductor memory. The storage medium 90 is fixedly provided or detachably mounted. The storage medium 100 includes various processing programs corresponding to the scientific electronic calculator 1 and data processed based on the various processing programs. Is stored.
[0050]
The program, data, and the like stored in the storage medium 100 may be configured to be received from another device connected via a communication line (not shown) and stored. Further, the storage medium 100 and the storage device 90 may be used by transferring a program or data from another device via a communication line.
[0051]
1.2 Operation
Next, the operation of the scientific calculator 1 according to the first embodiment will be described.
FIG. 5 is a flowchart for explaining the operation of the scientific calculator 1 relating to the first graph drawing process, and FIG. 6 shows a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0052]
In the first graph drawing process shown in FIG. 5, first, after switching the graph mode from OFF to ON (step S101), the CPU 10 starts executing the graph application and causes the display unit 40 to display the display range setting window RW. (Step S102). Then, the user inputs a numerical value or an undefined variable for setting the display range of the graph at the cursor position of the display range setting window RW by using, for example, the key group 3. Then, the CPU 10 detects that data specifying the display range has been input (Step S103; YES), and stores the input data in the RAM 50 as the display range setting data 51 (Step S104).
[0053]
FIGS. 6A and 6B are diagrams illustrating an example of a display screen displayed on the display unit 40 at this stage. In the display range setting window RW shown in FIG. 6A, the user can input a minimum X coordinate “Xmin”, a maximum X coordinate “Xmax”, a minimum Y coordinate “Ymin”, and a maximum Y coordinate “ Ymax "is set. FIG. 6B shows an example in which the user sets undefined variables to these values. In FIG. 6B, each value of the display range is represented by characters (undefined variables) such as “Xmin: −A”, “Xmax: A”, “Ymin: −B”, and “Ymax: B”. Is specified.
[0054]
Next, when the CPU 10 determines that the display range setting data 51 includes an undefined variable (step S105; YES), the CPU 10 calculates a value to be temporarily assigned to the undefined variable, and assigns the calculated value to the display range temporary assignment. It is stored in the RAM 50 as the value data 51a (step S106). On the other hand, if the CPU 10 determines that the display range setting data 51 does not include an undefined variable (step S105; NO), the process proceeds to step S107.
[0055]
Here, the value to be temporarily assigned to the undefined variable in step S106 may be calculated based on, for example, the value of the display range when the graph window GW was previously displayed on the display unit 40, or the default value may be stored in the ROM 70. The value may be stored in advance and calculated based on this value.
[0056]
Next, when the user inputs a graph expression and a graph drawing instruction from the key group 3 or the like, the CPU 10 detects the input (step S107; YES), and the input graph expression includes an undefined variable. It is determined whether or not this is the case (step S108). When the CPU 10 determines that the undefined variable is included in the graph expression (step S108; YES), the CPU 10 calculates the value of the undefined variable to be temporarily substituted into the graph expression, and uses the calculated value as the graph-type temporary substitution value data 52b. Is stored in the RAM 50 (step S109).
[0057]
Here, as the values to be substituted into the undefined variables in step S109, for example, when the graph expression is a quadratic function or a cubic function, the singular points such as the maximum value and the minimum value of the function are defined in steps S104 to S104. A value that falls within the display range set in S106 may be calculated and used. In the case of a linear function, default y-intercept and x-intercept data may be stored in the ROM 70 in advance, and the intercept may be used by calculating a value through which the graph passes.
[0058]
Subsequently, the CPU 10 calculates the graph data of the graph (step S110), and stores the graph data 52 and the graph data 52a in the RAM 50 (step S111). Next, the CPU 10 displays the graph window GW on the display unit 40 based on the display range setting data 51, and draws a graph (step S112).
[0059]
FIG. 6C is a diagram showing an example of the display screen at this stage. According to the figure, a graph window GW is displayed on the display unit 40, and the display range of the graph window GW is set according to the setting input by the user at the stage shown in FIG. That is, a display range of “−A” to “A” in the X-axis direction and a display range of “−B” to “B” in the Y-axis direction are displayed in the graph window GW, and the graph G1 is displayed therein. .
[0060]
Next, the CPU 10 determines whether or not the trace button TRB provided in the graph window GW has been selected and a trace execution instruction has been input (step S113). When determining that the instruction for tracing has not been input (step S113; NO), the CPU 10 terminates the first graph drawing process. On the other hand, when determining that the instruction for tracing has been input (step S113; YES), the CPU 10 performs the following processing.
[0061]
The CPU 10 determines the destination of the trace pointer based on the values stored in the display range temporary substitution value data 51a, the graph type data 52a, and the graph type temporary substitution value data 52b, and the relative position of the trace pointer with respect to the display screen. The position coordinates are calculated (step S114). At this time, when the display range setting data 51 and the graph data 52 include an undefined variable, the CPU 10 assigns a certain value to the undefined variable. Therefore, a calculation is performed to return the coordinate value determined by this value to the undefined variable, and the coordinate position of the destination of the trace pointer is calculated as a coordinate value including the undefined variable.
[0062]
Next, the CPU 10 stores the calculated destination position of the trace pointer as the coordinate value data 53 in the RAM 50 (step S115). Further, the trace pointer H1 is displayed at the trace position on the graph (step S116), and the coordinates of the trace position are displayed in the graph window GW (step S117).
[0063]
FIG. 6D shows an example of the display screen of the display unit 40 at this stage. According to the figure, the graph of the formula C1 “Y2 = 1nX” is drawn in the graph window GW, and the coordinate value “X = A / 5, Y = Ln (A / 5)” of the position of the trace pointer H1. Is displayed. In the example shown in FIG. 6, since the display range setting data 51 includes the undefined variables (A, B), the coordinate values shown at the time of tracing are represented including the undefined variables.
[0064]
Then, the CPU 10 repeats the processing of steps S114 to S117 until the user completes the operation of moving the trace pointer (step S118; YES). When the operation of moving is completed (step S118; NO), the first graph drawing processing is performed. To end.
[0065]
As described above, in the first embodiment, when the user specifies an undefined variable or a numerical value as data for setting a display range or a graph expression, a graph is drawn in the graph window GW. Further, even when an undefined variable is designated, the coordinate value of the trace position at the time of the trace processing is displayed using the undefined variable.
[0066]
For this reason, even when the display range and specific numerical values to be substituted into the graph formula are not determined, the shape of the graph can be visually confirmed in the graph window GW, and the graph can be easily imaged.
[0067]
2. Second embodiment
Hereinafter, a second embodiment will be described.
In the second embodiment, when the display range setting data includes an undefined variable, a temporary value is assigned to the undefined variable. After the display range is set by substituting the temporary value, if the graph to be drawn cannot be displayed within the display range, the value temporarily substituted into the display range setting data is changed. Thus, control for displaying the graph within the display range is performed.
[0068]
2.1 Internal configuration
The configuration of the scientific calculator 1 according to the second embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 is replaced with the RAM 250 and the ROM 70 is replaced with the ROM 270 in the first embodiment. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0069]
FIG. 7 is a diagram showing the configuration of the RAM 250. According to the figure, the RAM 250 stores the display range setting data 51 and the display range temporary substitution, which is a value calculated as a value temporarily substituted for the undefined variable when the display range setting data 51 includes an undefined variable. Value data 51a, graph data 52, graph type data (graph type data) 52a for drawing a graph, and a graph application screen for inputting a graph drawing command (hereinafter, referred to as "command data CW"). A storage area is provided for each of command data 54 to be executed and command temporary assignment value data 54a which is a value calculated as a value temporarily assigned to the undefined variable when the command data 54 includes an undefined variable. .
[0070]
FIG. 8 is a diagram showing a configuration of the ROM 270. According to the figure, the ROM 270 stores a second graph drawing processing program 271.
[0071]
The second graph drawing processing program 271 is a program for realizing the second graph drawing processing (see FIG. 9). When the CPU 10 executes the second graph drawing processing program 271, the second graph drawing processing is realized.
[0072]
2.2 Operation
Next, an operation of the scientific calculator 1 according to the second embodiment will be described.
FIG. 9 is a flowchart for explaining the operation of the scientific calculator 1 according to the second graph drawing process. FIG. 10 shows a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0073]
In the second graph drawing process shown in FIG. 9, first, the CPU 10 switches the graph mode from OFF to ON (step S201), starts execution of the graph application, and displays the display range setting window RW on the display unit 40. (Step S202). Then, the user inputs a numerical value or an undefined variable for setting the display range of the graph at the cursor position of the display range setting window RW by using, for example, the key group 3. Then, the CPU 10 detects that data specifying the display range has been input (Step S203; YES), and stores the input data as the display range setting data 51 in the RAM 250 (Step S204).
[0074]
FIG. 10A is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. In the display range setting window RW shown in FIG. 10A, the user can input a minimum X coordinate “Xmin”, a maximum X coordinate “Xmax”, a minimum Y coordinate “Ymin”, and a maximum Y coordinate “ Ymax "is set. When the user sets undefined variables to these values, as shown in the figure, for example, characters such as “Xmin: −A”, “Xmax: A”, “Ymin: −B”, and “Ymax: B” (Undefined variable) specifies the value.
[0075]
Next, when the CPU 10 determines that the display range setting data 51 includes an undefined variable (step S205; YES), the CPU 10 calculates a value to be temporarily assigned to the undefined variable, and assigns the calculated value to the display range temporary assignment. It is stored in the RAM 250 as the value data 51a (step S206). On the other hand, when determining that the display range setting data 51 does not include the undefined variable (step S205; NO), the CPU 10 shifts to step S207.
[0076]
Here, as the value to be temporarily assigned to the undefined variable in step S206, for example, the value may be calculated based on the value of the display range when the previous graph window GW was displayed on the display unit 40, and may be used. A default value may be stored in the ROM 270 or the like in advance, and a value calculated based on this value may be used.
[0077]
Next, the CPU 10 causes the display unit 40 to display the command window CW (Step S207). The user inputs command data for drawing a graph from the key group 3 or the like. Then, the CPU 10 detects that the command data has been input (Step S208; YES), and stores it as the command data 54 in the RAM 250 (Step S209).
[0078]
FIG. 10B is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, in the command window CW, a command for drawing a straight line from the coordinates (A, 5) to the coordinates (-B, B) is input.
[0079]
Next, the CPU 10 determines whether or not the same undefined variable as the undefined variable used for setting the display range setting data is included in the command data 54 (step S210). When determining that the same undefined variable is included in the command data 54 (step S210; YES), the CPU 10 determines whether or not the display range temporary substitution value data 51a is inappropriate for the command data 54. (Step S211). If the CPU 10 determines that the display range temporary substitution value data 51a is inappropriate (step S211; YES), the CPU 10 recalculates and updates the display range temporary substitution value data 51a (step S212).
[0080]
Here, a method of determining whether or not the display range temporary substitution value data 51a is inappropriate in step S211 will be specifically described. For example, assume that the display range in the X-axis direction is set to “−A to A” in step S204, and that a point is designated to be drawn at the position of the X coordinate “3” in step S209. At this time, if the display range temporary substitution value data 51a temporarily substituted for “A” is “0” or more and less than “3”, the designated point is drawn in the display range set on the display unit 40. Can not do it. As described above, when the graph instructed by the command data 54 cannot be drawn in the display range, it is determined that the graph is inappropriate.
[0081]
Next, the CPU 10 determines whether or not other undefined variables (other than the undefined variables included in the display range setting data 51) are included in the command data 54 (Step S213). If the CPU 10 determines that other undefined variables are included in the command data 54 (step S213; YES), the CPU 10 calculates a value to be temporarily assigned to the undefined variable, and uses the calculated value as the command temporary assignment value data 54a. Is stored in the RAM 250 (step S215).
[0082]
In the above-described step S215, a value that enables a graph based on the command data 54 to be displayed in the display range set by the display range setting data 51 is set as the command temporary substitution value. For example, when the graph indicated by the command data 54 is a quadratic function or a cubic function, the singular points such as the maximum value and the minimum value of the function fall within the display range set in steps S204 to S206. Such a value may be calculated and used. In the case of a linear function, default y-intercept and x-intercept data may be stored in the ROM 270 in advance, and a value that allows the graph to pass this intercept may be used.
[0083]
Next, the CPU 10 calculates the graph data 52 of the graph instructed to be drawn by the command data 54, and stores the graph data 52 and its graph formula data 52a in the RAM 250 (step S215). Then, the graph window GW is displayed on the display unit 40 based on the display range setting data 51, and a graph is drawn (step S216).
[0084]
FIG. 10C is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, in the graph window GW, drawing is instructed by a command for drawing a straight line from the coordinates (A, 5) to the coordinates (-B, B), which is input in the command window CW of FIG. The graph G2 is displayed within the display range.
When the above processing is executed, the CPU 10 ends the second graph drawing processing.
[0085]
As described above, in the second embodiment, even when the user specifies an undefined variable in the display range setting data or the command data 54, a desired graph is displayed in the graph window GW. Further, the value temporarily assigned to the undefined variable in the display range is automatically changed according to the command data 54, and the graph is automatically adjusted and displayed so as to fit within the display screen.
[0086]
Therefore, even when an undefined variable or a numerical value is specified in the display range of the graph or the command data 54, the scientific calculator 1 can display and draw the graph. Therefore, when the display range and the specific numerical values to be substituted into the command data 54 are not determined, the graph instructed to be drawn by the command data 54 is reliably displayed within the display range, which is convenient.
[0087]
3. Third embodiment
Hereinafter, a third embodiment will be described.
In the third embodiment, when the scale value data input in the display range setting window RW includes an undefined variable, a temporary value (hereinafter referred to as “scale value temporary substitution value data”) ").) If the display range setting data also includes an undefined variable, a temporary value (hereinafter referred to as “display range temporary substitution value data”) is substituted into the undefined variable, and the graph window GW is displayed. Display control is performed, and at that time, the following processing is performed. Based on the display range temporary substitution value data, the scale value temporary substitution value data, and the data of the default scale number of the predetermined scale, control is performed to display a predetermined number of scales in the display range of the display unit. is there.
[0088]
3.1 Internal configuration
The configuration of the scientific calculator 1 according to the third embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 is replaced with the RAM 350 and the ROM 70 is replaced with the ROM 370 in the first embodiment. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0089]
FIG. 11 is a diagram showing a configuration of the RAM 350. According to the figure, when the display range setting data 51 and the value for setting the display range of the display range setting data 51 include an undefined variable, the RAM 350 is a display that is a value temporarily assigned to the undefined variable. When the undefined variable is included in the value for setting the scale value of the range provisionally substituted value data 51a and the display range setting data 51, the scale value provisionally substituted value data 51b which is a value provisionally substituted for the undefined variable, a graph A data storage area for data 52 and graph formula data 52a for drawing a graph is provided.
[0090]
FIG. 12 is a diagram showing a configuration of the ROM 370. According to the figure, the ROM 370 stores a scale display processing program 371 and default scale number data (hereinafter referred to as “scale number default data”) 372.
[0091]
The scale display processing program 371 is a program for implementing the scale display processing (see FIG. 13). When the CPU 10 executes the scale display processing program 371, the scale display processing is realized.
[0092]
The scale number default data 372 is a value preset as the number of scales to be displayed in the graph window GW when the display range setting data 51 includes an undefined variable. Note that the scale number default data 372 may be appropriately set by the user.
[0093]
3.2 Operation
Next, the operation of the scientific calculator 1 according to the third embodiment will be described.
FIG. 13 is a flowchart for explaining the operation of the scientific calculator 1 according to the scale display process. FIG. 14 is a diagram showing a transition example of a display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. It is.
[0094]
First, the scale value will be described with reference to FIG. FIG. 14A is a diagram illustrating an example in which the scale and the graph G3 are displayed in the graph window GW. As shown in the figure, in the graph window GW, scales are provided at regular intervals on the X axis and the Y axis. The width of one scale value is called a scale value.
[0095]
In the scale display processing shown in FIG. 13, first, the CPU 10 switches the graph mode from OFF to ON (step S301), starts execution of the graph application, and displays the display range setting window RW on the display unit 40 (step S301). S302). Then, the user moves the cursor displayed in the display range setting window RW using, for example, the key group 3, selects the display range of the graph and the input field of the scale value, and inputs a numerical value or an undefined variable. Then, the CPU 10 detects that data specifying the display range and the scale value has been input (step S303; YES), and stores the input data as the display range setting data 51 in the RAM 370 (step S304).
[0096]
FIG. 14B is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. In the display range setting window RW shown in the figure, the user can specify the minimum value “Xmin” of the X coordinate, the maximum value “Xmax” of the X coordinate, the minimum value “Ymin” of the Y coordinate, and the maximum value “Ymax” of the Y coordinate. Data for setting a display range to be determined and data for a scale value determined by “scale” are set. The user sets undefined variables or numerical values to these values, for example. According to the figure, the set values are “Xmin: −A”, “Xmax: A”, “Ymin: −3.1”, and “Ymax: 3.1”.
[0097]
Next, when the CPU 10 determines that the display range setting data 51 includes an undefined variable (step S305; YES), the process proceeds to step S306.
[0098]
In step S306, the CPU 10 first reads the scale number default data 372 stored in the ROM 370 in advance. Then, the values of the display range tentative substitution value data 51a and the scale value tentative substitution value data 51b are calculated so that the number of graduations indicated by the graduation number default data 372 is displayed within the display range of the graph window GW.
[0099]
Specifically, for example, the setting is such that the number of scales “10” is displayed in the X-axis direction of the display range, and the display range setting data 51 is “Xmax: A”, “Xmin: −A”, and “Ymax: 5 "and" Ymin: -5 ", and when the scale value is set to" scale: B ", the CPU 10 determines the value of the width in the X-axis direction displayed in the display range, that is, the number of scales over 2A. Control is performed to display “10”. Therefore, the width of one scale, that is, the value of the scale B is “2A / 10” (“A / 5”). Therefore, when “20” is temporarily assigned to the undefined variable A, the value temporarily assigned to the undefined variable B automatically becomes “A / 5 = 4”.
As described above, the CPU 10 determines the display range temporary substitution value data 51a and the scale value temporary substitution value data 51b based on the scale number default data 372.
[0100]
As the scale number default data 372, data of different scale numbers in the X-axis direction and the Y-axis direction of the graph window GW may be stored, or may be the same data.
[0101]
Next, the CPU 10 stores the display range provisional substitution value data 51a and the scale value provisional substitution value data 51b calculated in step S306 in the RAM 350 (step S307), and based on the display range setting data 51, The graph window GW is displayed, and the scale is displayed on the screen (step S308).
[0102]
FIG. 14C is a diagram illustrating an example of a display screen on the display unit 40 at this stage. According to the figure, a scale is displayed on the X axis and the Y axis in the graph window GW.
After executing the above processing, the CPU 10 ends the scale display processing.
[0103]
As described above, in the third embodiment, even when the user specifies an undefined variable in the display range or scale value of the graph window GW, the scientific calculator 1 does not execute the error processing. The scale is displayed in the graph window GW.
[0104]
Therefore, regardless of whether the scale value of the display range is a specific numerical value or an undefined variable, the scale is displayed in the graph window GW, so that the user can efficiently perform learning using the graph. .
[0105]
4. Fourth embodiment
Hereinafter, a fourth embodiment will be described.
In the fourth embodiment, a mathematical expression window FW for displaying a mathematical expression, a graph window GW for displaying a graph, and an expression display field WW for displaying a graph expression of a graph selected by the user are displayed on the display unit 40. Also, when a graph expression including an undefined variable is input, a graph is drawn in the graph window GW by substituting a temporary value for the undefined variable. Further, when an arbitrary coordinate on the graph window GW is designated by the user, control is performed to change the drawing position of the graph according to the designated coordinate and to change the value temporarily assigned to the undefined variable. is there.
[0106]
4.1 Internal configuration
The configuration of the scientific calculator 1 in the fourth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with a RAM 450, and the ROM 70 is replaced with a ROM 470. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0107]
FIG. 15 is a diagram showing a configuration of the RAM 450. According to the figure, the RAM 450 stores the graph data 52, which is display data in the graph window GW, the graph formula data 52a for drawing a graph, and the undefined variables when the graph formula data 52a includes the undefined variables. Storing of graph-type temporary substitution value data 52b, which is a value calculated as a value to be temporarily substituted, mathematical expression data 55, which is display data in a mathematical expression window FW, and graphic specification data 60 for specifying a graphic to be drawn. With an area.
[0108]
FIG. 16 is a diagram showing a configuration of the ROM 470. According to the figure, the ROM 470 stores a graph display position designation processing program 471.
[0109]
The graph display position designation processing program 471 is a program for realizing the graph display position designation processing (see FIG. 17). When the CPU 10 executes the graph display position designation processing program 471, the graph display position designation processing is realized.
[0110]
4.2 Operation
Next, the operation of the scientific calculator 1 according to the fourth embodiment will be described.
FIG. 17 is a flowchart for explaining the operation of the scientific calculator 1 according to the graph display position designation processing. FIG. 18 is a transition example of a display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0111]
In the graph display position designation processing shown in FIG. 17, the user designates a desired graphic type using the key group 3 or the input pen 4, and numerical values or characters (data) for specifying the graphic are designated. Undefined variables, etc. (hereinafter referred to as “figure specific data”) are input. Then, the CPU 10 detects the type of the graphic to be drawn (step S401), detects the input of the graphic specifying data (step S402), and stores it as the graphic specifying data 60 in the RAM 450 (step S404).
[0112]
Next, when the CPU 10 determines that the graphic specification data 60 includes an undefined variable (step S405; YES), the CPU 10 calculates a value to be temporarily substituted for the undefined variable, and uses the calculated value as a graph-based temporary substitution value. The data is stored in the RAM 450 as the data 52b (step S406).
[0113]
Next, the CPU 10 calculates the graph data of the figure to be drawn, and stores the graph data 52 and the graph formula data 52a in the RAM 450 (step S407). Next, the CPU 10 sends the graph data 52 to the display unit 40 and draws a graph in the graph window GW (step S408).
[0114]
FIGS. 18A and 18B are diagrams illustrating an example of a display screen on the display unit 40 at this stage. FIG. 18A is an example of a screen on which a graph expression C4 is displayed in the mathematical expression window FW, and a graph G4 based on the graph expression C4 has already been drawn in the graph window GW. In the graph window GW, the user uses the input pen 4 to specify figure specifying data for specifying the center and radius of the circle and input a circle drawing command. Thereby, for example, the graph expression “(x−A) ＾ 2 + (y−B) ＾ 2 = 4” including the undefined variables “A” and “B” is specified and stored in the RAM 450 as the graph expression data 52a. Is done.
[0115]
The CPU 10 draws the graph G5 shown in FIG. 18A according to the command, and displays the pointer H10 at the center of the graph G5. In FIG. 18B, the user moves the pointer H10 of the graph G5 using the input pen 4, and inputs a command to change the display position of the graph G5. In response to this, the CPU 10 executes the processing from step S410 described below.
[0116]
Next, when the CPU 10 detects that the coordinates on the graph are designated (step S409; YES), the CPU 10 re-executes the value of the graph-type provisionally substituted value data 52b to be temporarily substituted for the undefined variable from the designated position (coordinate). After the calculation, the graph formula data 52a and the graph formula provisionally substituted value data 52b are updated (step S410). After recalculating the graph data (step S411), the CPU 10 changes the display position of the graph (step S412). Then, a graph formula is displayed in the formula display field WW of the display unit 40 (step S413).
[0117]
FIGS. 18C and 18D are diagrams illustrating an example of the display screen of the display unit 40 at this stage. As shown in FIG. 18C, when the user moves the center H10 of the graph G5 using the input pen 4 and specifies coordinates, the CPU 10 changes the display position of the graph G5. Thereafter, as shown in FIG. 18 (d), the graph expression of the moved graph G5 is displayed in the expression display column WW. In the expression display column WW, a graph expression C5 of a graph G5 including undefined variables A and B is displayed.
[0118]
Note that when a specific numerical value is set in the display range of the graph window GW, the accurate position of the graph G5 can be calculated. Therefore, instead of the screen of FIG. As described above, the graph formula C5 'into which specific numerical values are substituted may be displayed in the formula display column WW.
[0119]
As described above, in the fourth embodiment, when the user inputs a mathematical expression including an undefined variable, the scientific calculator 1 draws a graph on the display unit 40 without performing error processing. When an instruction to change the position of the graph is input after drawing the graph, the drawing position of the graph is changed.
[0120]
Therefore, it is possible to draw a graph based on a mathematical expression including an undefined variable and change the display position of the graph based on the coordinate position specified by the user. Therefore, a graph can be drawn at a desired position imagined by the user.
[0121]
5. Fifth embodiment
Hereinafter, a fifth embodiment will be described.
In the fifth embodiment, a graph based on a mathematical expression input to a mathematical expression window FW is drawn in a graph window GW. When the condition of the undefined variable included in the mathematical expression input to the mathematical expression window FW is input to the condition data input box IA, the position of the graph drawn in the graph window GW is changed according to the condition. The control is performed.
[0122]
5.1 Internal configuration
The configuration of the scientific calculator 1 in the fifth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 is replaced with the RAM 550 and the ROM 70 is replaced with the ROM 570 in the first embodiment. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0123]
FIG. 20 is a diagram showing a configuration of the RAM 550. According to the figure, the RAM 550 stores the graph data 52, which is display data in the graph window GW, the graph formula data 52a for drawing a graph, and the undefined variables when the graph formula data 52a includes undefined variables. Of the graph-type provisionally-substituted value data 52b, which is a value calculated as a value to be temporarily substituted into the formula data 55, which is display data in the formula window FW, and condition data 56, which is display data in the condition data input box IA. It has a storage area.
[0124]
FIG. 21 is a diagram showing a configuration of the ROM 570. According to the figure, the ROM 570 stores a condition setting graph drawing program 571.
[0125]
The condition setting graph drawing processing program 571 is a program for realizing the condition setting graph drawing processing (see FIG. 22). When the CPU 10 executes the condition setting graph drawing processing program 571, the condition setting graph drawing processing is realized.
[0126]
5.2 Operation
Next, an operation of the scientific calculator 1 according to the fifth embodiment will be described.
FIG. 22 is a flowchart for explaining the operation of the scientific calculator 1 related to the condition setting graph drawing processing. FIG. 23 is a transition example of a display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0127]
In the condition setting graph drawing process shown in FIG. 22, first, the CPU 10 switches the graph mode from OFF to ON (step S501). Next, the execution of the calculation application and the graph application is started, and the formula window FW, the graph window GW, and the condition data input field IA are displayed on the display unit 40 (step S502). Then, the user inputs a mathematical expression including an undefined variable into the mathematical expression window FW using the key group 3, for example, and inputs a command for drawing a graph.
[0128]
If the CPU 10 determines that a mathematical expression including an undefined variable has been input to the mathematical expression window FW and a drawing command has been designated (step S503; YES), the input graph expression is stored in the RAM 550 as mathematical expression data 55 (step S504). ).
[0129]
Next, the CPU 10 calculates a value to be temporarily substituted into an undefined variable in the mathematical expression so that the graph based on the mathematical expression input by the user fits in the display area of the graph window GW, and sets the value as the graph-type temporary substituted value data 52b. It is stored in the RAM 550 (step S505). The CPU 10 calculates the graph data from the mathematical expression into which the temporary substitution value has been substituted, and stores the graph data 52 and the graph expression data 52a in the RAM 550 (step S506). Next, the CPU 10 draws a graph in the graph window GW (step S507).
[0130]
FIGS. 23A and 23B are diagrams showing transition examples of the display screen displayed on the display unit 40 at this stage. In the example shown in FIG. 23A, the mathematical expression C6 “Y = X + A” is displayed in the mathematical expression window FW, and the graph expression G6 of the mathematical expression C6 is displayed in the graph window GW. Further, in the example shown in FIG. 23B, the mathematical expression C7 “Y = X + B” is added to the mathematical expression window FW, and the graph G7 of the mathematical expression C7 is displayed in the graph window GW.
[0131]
Subsequently, when the condition of the undefined variable included in the formula displayed in the formula window FW is input in the condition data input field IA (step S509; YES), the input condition is set as the condition data 56. It is stored in the RAM 550 (step S510).
[0132]
Next, the CPU 10 determines whether or not the value temporarily assigned to the undefined variable of the mathematical expression in step S505 matches the condition of the condition data 56 (whether or not the condition is satisfied) (step S511). When the CPU 10 determines that the graph-type provisionally substituted value data 52b matches the condition data 56 (step S511; YES), the condition setting graph drawing process ends.
[0133]
On the other hand, if the graph-type temporary substitution value data 52b does not match the condition data 56 (step S511; NO), the CPU 10 recalculates the graph-type temporary substitution value data 51b so as to satisfy the condition indicated by the condition data 56. Then, the graph-type temporary substitution value data 51b is updated (step S512). Next, the CPU 10 calculates the graph data of the mathematical expression data 51 into which the updated graph-type temporary substitution value data 51b is substituted, and updates the graph data 52 and the graph-type data 52a (step S513). Then, the CPU 10 updates the drawing position of the graph in the graph window GW (step S514).
[0134]
FIGS. 23C and 23D are diagrams showing transition examples of the display screen displayed on the display unit 40 at this stage. According to FIG. 23 (c), the condition J1 “A>B> 0” has been input by the user in the condition data input field IA. When the condition J1 is input, the CPU 10 changes the drawing positions of the graphs G6 and G7 according to the condition. In this screen example, the values of the y-intercepts of the equations C6 and C7 indicating the straight lines are positive, and the condition that A takes a larger value than B is specified, so that the graphs G6 and G7 as shown in FIG. Is changed.
When the above processing is performed, the CPU 10 ends the condition setting graph drawing processing.
[0135]
As described above, in the fifth embodiment, when the user specifies a mathematical expression including an undefined variable and instructs to draw a graph based on the mathematical expression, the graph is drawn on the display unit 40 of the scientific calculator 1. You. If a condition indicating the magnitude relation of undefined variables included in each formula is input, if the drawn graph does not satisfy the condition, the display position is changed. Is made.
[0136]
Therefore, not only can a graph based on a mathematical expression including an undefined variable be displayed, but also a graph can be displayed at a position exactly as specified by specifying a condition.
[0137]
6. Sixth embodiment
Hereinafter, the sixth embodiment will be described.
In the sixth embodiment, a graph based on a mathematical expression input to a mathematical expression window FW is drawn in a graph window GW. When data indicating the condition of the undefined variable included in the formula input to the formula window FW is input to the condition data input box IA, all values satisfying this condition are substituted for the undefined variable of the formula. . Then, by drawing all the obtained data in the graph window GW, control is performed to draw a graph having a predetermined line width.
[0138]
6.1 Internal configuration
The configuration of the scientific calculator 1 according to the sixth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 is replaced with the RAM 650 and the ROM 70 is replaced with the ROM 670 in the first embodiment. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0139]
FIG. 24 is a diagram showing a configuration of the RAM 650. According to the figure, the RAM 650 stores the graph data 52, which is display data in the graph window GW, the graph formula data 52a for drawing a graph, and temporarily substitutes the undefined variables when the graph formula includes the undefined variables. A storage area for each data of a graph-type temporary substitution value data 52b, which is a value calculated as a value to be calculated, a formula data 55, which is display data in a formula window FW, and a condition data 56, which is display data in a condition data input field IA. Is provided.
[0140]
FIG. 25 is a diagram showing the configuration of the ROM 670. According to the figure, the ROM 670 stores a condition satisfaction graph full rendering processing program 671.
[0141]
The condition satisfaction graph full drawing processing program 671 is a program for realizing the condition satisfaction graph full drawing processing (see FIG. 26). The CPU 10 executes the condition satisfaction graph full drawing processing program 671 to realize the condition satisfaction graph full drawing processing.
[0142]
6.2 Operation
Next, the operation of the scientific calculator 1 according to the sixth embodiment will be described.
FIG. 26 is a flowchart for explaining the operation of the scientific calculator 1 according to the condition satisfaction graph full drawing process. FIG. 27 is a transition example of a display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0143]
In the condition satisfaction graph full rendering process shown in FIG. 26, first, the CPU 10 switches the graph mode from OFF to ON (step S601). Next, the execution of the calculation application and the graph application is started, and the formula window FW, the graph window GW, and the condition data input field IA are displayed on the display unit 40 (step S602). Then, the user inputs a mathematical expression including an undefined variable into the mathematical expression window FW using the key group 3, for example, and inputs a command for drawing a graph.
[0144]
When a mathematical expression including an undefined variable is input in the condition data input field IA (step S603; YES), the CPU 10 stores the input mathematical expression in the RAM 650 as the mathematical expression data 55 (step S604). Next, the CPU 10 calculates a value to be temporarily substituted for an undefined variable included in the mathematical expression so that the graph based on the mathematical expression falls within the display range of the graph window GW, and uses the calculated value as a graph-type temporary substitution value. The data is stored in the RAM 650 (step S605).
[0145]
Subsequently, the CPU 10 calculates graph data from the mathematical expression into which the temporary substitution value has been substituted, and stores the graph data 52 and the graph expression data 52a in the RAM 650 (step S606). Next, the CPU 10 draws a graph in the graph window GW (step S607).
[0146]
FIG. 27A is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, the formula C8 “Y = X + A” is displayed in the formula window FW, and the graph G8 of the formula C8 is displayed in the graph window GW.
[0147]
Next, when the condition specifying the range of the undefined variable included in the mathematical expression displayed in the mathematical expression window FW is input in the condition data input field IA (step S609: YES), the input condition is determined. The data 56 is stored in the RAM 650 (step S610).
[0148]
Next, the CPU 10 sets all the values satisfying the condition data 56 in the graph-type temporary substitution value data 52b, substitutes the graph-type temporary substitution value data 52b into the mathematical expression data 55, and calculates all graph data. The graph data 52 and the graph formula data 52a are updated (step S611). Then, the CPU 10 draws a graph in the graph window GW based on all the graph data calculated in step S611 (step S612).
[0149]
FIGS. 27B and 27C are diagrams showing transition examples of the display screen displayed on the display unit 40 at this stage. In FIG. 27B, the condition J2 “2>A> −1” has been entered in the condition data input field IA. The CPU 10 substitutes a numerical value in the range specified by the condition J2 into the undefined variable A of the mathematical expression C8 “Y = X + A” displayed in the mathematical expression window FW, and as shown in FIG. (Graphs from "Y = X + 2" to "Y = X-1") are displayed in the graph window GW.
When the above processing is performed, the CPU 10 ends the condition satisfaction graph full rendering processing.
[0150]
As described above, in the sixth embodiment, when the user specifies a mathematical expression including an undefined variable and inputs a graph drawing command, a graph based on the mathematical expression is displayed on the display unit 40. When a condition for specifying a range of values to be assigned to an undefined variable is input, all graphs satisfying this condition are displayed in the graph window GW.
[0151]
Therefore, not only can a graph be displayed by specifying a mathematical expression including an undefined variable, but also by inputting a value range of the undefined variable as a condition after the graph is drawn, a desired condition can be set. All graphs that satisfy (have a predetermined width) can be displayed.
[0152]
Note that, for example, when “A> −1” is input as the condition in FIG. 27B, the area where the y intercept of Expression C8 is larger than “−1” is filled (as an infinite width). Graph) is drawn.
[0153]
7. Seventh embodiment
Hereinafter, the seventh embodiment will be described.
In the seventh embodiment, a table of initial values, terminal values, step sizes, and the like input on a display range setting screen (hereinafter, referred to as a “table display range setting window TRW”) of a table of a calculation application is used. When undefined variables are included in the data for setting the display range (hereinafter referred to as “table display range setting data”), n (n is a positive integer) data from the initial value and the end value Calculate n data. The calculated data is displayed on a table display screen (hereinafter, referred to as a “table window TW”) of the calculation application, and control is performed to display an abbreviation symbol for an omitted part for which a value is not calculated. is there.
[0154]
7.1 Internal configuration
The configuration of the scientific calculator 1 in the seventh embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 is replaced with the RAM 750 and the ROM 70 is replaced with the ROM 770 in the first embodiment. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0155]
FIG. 28 is a diagram showing a configuration of the RAM 750. According to the figure, the RAM 750 has a storage area for data of table display range setting data 57 which is display data in the table display range setting window TRW, and table data 58 which is display data in the table window TW.
[0156]
FIG. 29 is a diagram showing a configuration of the ROM 770. According to the figure, a table display processing program 771 is stored in the ROM 770.
[0157]
The table display processing program 771 is a program for implementing the table display processing (see FIG. 30). The table display processing is realized by the CPU 10 executing the table display processing program 771.
[0158]
7.2 Operation
Next, the operation of the scientific calculator 1 according to the seventh embodiment will be described.
FIG. 30 is a flowchart for explaining the operation of the scientific calculator 1 according to the table display processing. FIG. 31 is a diagram showing a transition example of a display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. It is.
[0159]
In the table display process shown in FIG. 30, first, the CPU 10 switches the table mode from OFF to ON (step S701). Next, the execution of the calculation application is started, and the display section 40 displays the table display range setting window TRW (step S702). The user inputs and sets each value of the initial value (start), end value (end), and step size (pitch) in the table display range setting window TRW.
[0160]
When the CPU 10 determines that the user has input the data of the initial value, the terminal value, and the step size in the table display range setting window TRW (step S703; YES), the input data is stored in the RAM 750 as the table display range setting data 57. (Step S704). Next, the CPU 10 determines whether or not an undefined variable is included in the table display range setting data 57 (step S705), and when it is determined that the undefined variable is not included (step S705; NO), The table data is calculated based on the table display range setting data 57 (step S708), and the process proceeds to step S709.
[0161]
On the other hand, if the CPU 10 determines that the table display range setting data 57 includes an undefined variable (step S705; NO), it calculates n data from the initial value (step S706), Are calculated from the data (step S707).
[0162]
Next, the CPU 10 stores the data of the table calculated in step S706 and S707 or S708 in the RAM 750 as the table data 58 (step S709). Then, the table data is sent to the display unit 40, and the table is displayed in the table window TW (step S710). When the CPU 10 calculates the table data based on the table display range setting data including the undefined variable, in step S710, the CPU 10 calculates a value between n values calculated from each of the initial value and the terminal value. Ellipses SH are displayed for values that have not been set.
[0163]
FIGS. 31A and 31B show screen transitions until a table is displayed in the table display window TW based on the table display range setting data 57 specified by the user. As shown in FIG. 31 (a), in the table display range setting window TRW, “(Y =) PX” is set in Expression C9, “1” is set in the initial value, undefined variable “A” is set in the end value, and undefined in the step size When the definition variable “B” is set, the CPU 10 calculates n (“n = 3” in the figure) data from the initial value “1” and n data from the terminal value “A”. Calculate the data. Then, the calculated data is displayed in the table window TW shown in FIG. 31B, and the abbreviation symbol SH is displayed in the omitted part.
[0164]
Although not shown, when a specific numerical value is set in the table display range setting data 57, all the table data is calculated and displayed in the table window TW without displaying the abbreviation SH. If the initial value “1”, the terminal value “10”, and the step size “2” are specified for the mathematical expression C9 “Y = PX” shown in FIG. 31A, the CPU 10 sets the value of X to “1, 2, 5, 7, 9 "and the corresponding Y value" P, 2P, 5P, 7P, 9P "in the table window TW.
When the above processing is executed, the CPU 10 ends the table display processing.
[0165]
As described above, in the seventh embodiment, when the user inputs the setting data of the display range of the table, even if the setting data includes an undefined variable, the table based on the setting data is displayed in the table window TW. Will be displayed.
[0166]
Therefore, even when a specific value is not set in the display range setting data of the table, the table can be displayed without error processing being performed by the scientific calculator 1.
[0167]
8. Eighth embodiment
Hereinafter, an eighth embodiment will be described.
In the eighth embodiment, when data (initial value, terminal value, step size) for setting the display range of a table input in the table display range setting window TRW includes an undefined variable, n (n is a positive integer) data and n data are calculated from the terminal value. Then, the calculated data is displayed in the table window TW, and an abbreviation symbol is displayed for an omitted part for which a value has not been calculated. Further, when an instruction to display the omitted part is input, control is performed to calculate and display a general formula for calculating the value of the omitted part.
[0168]
8.1 Internal configuration
The configuration of the scientific calculator 1 in the eighth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with a RAM 850, and the ROM 70 is replaced with a ROM 870. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0169]
FIG. 32 is a diagram showing a configuration of the RAM 850. According to the figure, the RAM 850 includes table display range setting data 57 which is display data in the table display range setting window TRW, table data 58 which is display data in the table window TW, and an omitted portion of the table based on the table data 58. (Hereinafter referred to as "general formula data") 58a, and a storage area for each data.
[0170]
FIG. 33 is a diagram showing a configuration of the ROM 870. According to the figure, the ROM 870 stores a table selection portion display processing program 871.
[0171]
The table selection part display processing program 871 is a program for implementing the table selection part display processing (see FIG. 34). When the CPU 10 executes the table selection portion display processing program 871, the table selection portion display process is realized.
[0172]
8.2 Operation
Next, the operation of the scientific calculator 1 according to the eighth embodiment will be described.
FIG. 34 is a flowchart for explaining the operation of the scientific calculator 1 according to the table selection portion display processing. FIG. 35 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0173]
In the table selection portion display processing shown in FIG. 34, first, the CPU 10 switches the table mode from OFF to ON (step S801). Next, execution of the calculation application is started, and the table display range setting window TRW is displayed on the display unit 40 (step S802). The user inputs and sets each value of the initial value (start), end value (end), and step size (pitch) in the table display range setting window TRW.
[0174]
When the CPU 10 determines that the user has input the data of the initial value, the terminal value, and the step size in the table display range setting window TRW (step S803; YES), the input data is stored in the RAM 850 as the table display range setting data 57. (Step S804).
[0175]
FIG. 35A shows an example of a display screen displayed on the display unit 40 at this stage. According to the figure, “Y = PX” is set in Expression C10, “1” is set as the initial value, undefined variable “A” is set as the end value, and undefined variable “B” is set as the step size.
[0176]
Next, the CPU 10 determines whether or not an undefined variable is included in the table display range setting data 57 (step S805). If it is determined that no undefined variable is included (step S805; NO), The table data is calculated based on the table display range setting data 57 (step S808), and the process proceeds to step S809.
[0177]
On the other hand, if the CPU 10 determines that the table display range setting data 57 includes an undefined variable (step S805; NO), it calculates n data from the initial value (step S806), Are calculated from the data (step S807).
[0178]
Next, the CPU 10 stores the data of the table calculated in step S806 and S807 or S808 as the table data 58 in the RAM 850 (step S809). Then, the table data is sent to the display unit 40, the table is displayed in the table window TW, and the abbreviation symbol SH is displayed in the portion of the table that is omitted and displayed (step S810).
[0179]
FIG. 35B is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to FIG. 35, a table based on the table display range setting data set on the screen of FIG. 35A is displayed. The user moves the cursor position by operating the key group 3 and selects a desired value in the table. Then, the CPU 10 reversely displays the data at the cursor position (hereinafter, referred to as “trace data”) and displays the trace data “2B + 1” on the trace data display section TD at the lower right of the table data TW.
[0180]
Subsequently, when the CPU 10 determines that the movement of the cursor (hereinafter, referred to as “trace”) has been input by the user (step S811; YES), the CPU 10 further determines whether or not the trace position is the part of the abbreviation SH. It is determined (step S812). If the CPU 10 determines that the ellipse SH is being traced (step S812; YES), the CPU 10 moves the cursor to the ellipse SH and highlights it, and calculates the general formula of the data of the ellipse. Is stored in the RAM 850 as the general formula data 58a (step S813). Then, the calculated general formula is set in the trace data (step S814), and the process proceeds to step S816.
[0181]
FIG. 35C is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, the ellipse SH is being traced, and the ellipse SH is highlighted. Further, the general formula “X = t, Y = tP” is displayed in the trace data display section TD at the lower right of the table window TW.
[0182]
On the other hand, when the CPU 10 determines that data other than the abbreviation SH has been traced (step S812; NO), the CPU 10 moves the cursor to the trace data, highlights the trace data, and sets the trace data (step S815). It moves to step S816.
[0183]
Subsequently, the CPU 10 displays the trace data on the trace data display section TD (Step S816). Next, the CPU 10 determines whether or not the movement of the cursor has been detected (step S817). If the movement of the cursor has been detected (step S817: YES), the process returns to step S812. On the other hand, when the movement of the cursor is not detected (step S817; NO), the CPU 10 further determines whether or not there is an end input by the user (step S818). The CPU 10 terminates the table selection portion display processing when an end input is made by the user (step S818; YES), and executes other processing when the end input is not made (step S818; NO).
[0184]
As described above, in the eighth embodiment, when the user sets a numerical value or an undefined variable for the table display range setting data 57, a table is displayed in the table window TW. When the cursor is moved and the ellipse SH in the table is traced, a general formula indicating the data of the ellipse SH is displayed.
[0185]
Therefore, even when undefined variables are included in the table display range setting data 57, a desired table can be displayed and data can be confirmed. Further, when the ellipses SH in the table are traced, it is possible to confirm the data of the ellipses by a general formula.
[0186]
9. Ninth embodiment
Hereinafter, a ninth embodiment will be described.
In the ninth embodiment, an increase / decrease table is calculated based on the mathematical expression input in the mathematical expression window FW, and is displayed on a display screen for the increase / decrease table (hereinafter, referred to as “increase / decrease table window ATW”). When an undefined variable is included in a formula input in the formula window FW, the case of the value of the undefined variable is classified. Then, an increase / decrease table is calculated for each case. In addition, in accordance with a display switching instruction from the user, control is performed to switch and display the increase / decrease table for each case one by one in the increase / decrease table window ATW.
[0187]
9.1 Internal configuration
The configuration of the scientific calculator 1 in the ninth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with a RAM 950, and the ROM 70 is replaced with a ROM 970. For this reason, the same reference numerals are given to the same functional units, and redundant description will be omitted.
[0188]
FIG. 36 is a diagram showing a configuration of the RAM 950. According to the figure, a storage area is provided for each data of formula data 55 which is display data in the formula window FW and change table data 59 which is display data in the change table window ATW.
[0189]
FIG. 37 is a diagram showing the configuration of the ROM 970. According to the figure, the ROM 970 stores an increase / decrease table display processing program 971.
[0190]
The increase / decrease table display processing program 971 is a program for realizing the increase / decrease table display processing (see FIG. 38). The CPU 10 executes the increase / decrease table display processing program 971 to realize the increase / decrease table display processing.
[0191]
9.2 Operation
Next, the operation of the scientific calculator 1 according to the ninth embodiment will be described.
FIG. 38 is a flowchart for explaining the operation of the scientific calculator 1 according to the increase / decrease table display processing. FIGS. 39 and 40 show an example of a display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0192]
In the increase / decrease table display process shown in FIG. 38, first, the CPU 10 switches the increase / decrease table mode from OFF to ON (step S901). Next, the execution of the calculation application is started, and the display unit 40 displays the formula window FW and the increase / decrease table window ATW (step S902). The user uses the key group 3 to input a desired mathematical expression in the mathematical expression window FX, and then inputs a command for creating an increase / decrease table.
[0193]
Then, when the CPU 10 detects that a mathematical expression is input to the mathematical expression window FW and a command to create an increase / decrease table is input (step S903; YES), the CPU 10 stores the mathematical expression as the mathematical expression data 55 in the RAM 950 (step S904).
[0194]
FIG. 39 is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, the display unit 40 displays a formula window FW and an increase / decrease table window ATW. Also, the mathematical expression window FW displays the mathematical expression C11 “Y1: (X−2) (X + 1) (X−A)” input by the user.
[0195]
Next, the CPU 10 determines whether or not the mathematical expression data 55 includes an undefined variable (Step S905). When determining that the mathematical expression data 55 includes an undefined variable (Step S905; YES), the CPU 10 executes a case classification of the undefined variable (Step S906). Next, the CPU 10 calculates an increase / decrease table for each case (step S907), and stores the calculated data of the increase / decrease table in the RAM 950 as the increase / decrease table data 59 (step S908). Next, the CPU 10 displays one of the increase / decrease tables among the divided cases in the increase / decrease table window ATW (step S909).
[0196]
Here, when displaying the increase / decrease table of other cases, the user uses the key group 3 to input a display switching instruction. Then, CPU 10 determines whether or not a display switching instruction has been input (step S910), and determines that a display switching instruction has been input (step S910; YES). It is displayed on the table window ATW (step S911). On the other hand, when determining that the instruction to switch the display has not been input (step S910; NO), the CPU 10 ends the increase / decrease table display processing.
[0197]
FIGS. 40 (a), (b) and (c) show the case where an undefined variable is included in the mathematical expression input to the mathematical expression window FW, and the display switching unit is input in step S910. FIG. 10 is a diagram showing a transition example of a display screen displayed on 40. For example, as shown in FIG. 39, when the mathematical expression C11 “(X−2) (X + 1) (X−A)” including the undefined variable A is input into the mathematical expression window FW, the CPU 10 sets “A < -1 "," -1 <A <2 ", and"A> 2 "are executed, and an increase / decrease table for each case is created. FIG. 40A shows an increase / decrease table for “A <−1”, FIG. 40B shows an increase / decrease table for “−1 <A <2”, and FIG. 40B shows an increase / decrease table for “A> 2”. Is shown in FIG. The CPU 10 sequentially displays the screens of FIGS. 40 (a), (b), and (c) in the increase / decrease table window ATW each time the display switching instruction input is detected. ) Is displayed.
[0198]
When the CPU 10 determines in step S905 that the mathematical expression data 55 does not include an undefined variable (step S905; NO), the CPU 10 calculates an increase / decrease table based on the mathematical expression data 55 (step S912). Is stored in the RAM 950 as the change table data 59 (step S913). Next, the CPU 10 displays the change table in the change table window ATW (step S914), and ends the change table display process.
[0199]
As described above, in the ninth embodiment, when the user inputs a mathematical expression and inputs a command instructing creation of an increase / decrease table, an increase / decrease table based on the expression is displayed on the display unit 40. If an undefined variable is included in the input mathematical expression, the scientific calculator 1 executes a case classification process on the value of the undefined variable, and displays an increase / decrease table for each case.
[0200]
Therefore, it is possible to display an increase / decrease table of a mathematical expression including an undefined variable on the scientific calculator 1, and the user can use it for learning or the like.
[0201]
The detailed configuration and detailed operation of the scientific electronic calculator 1 in each of the first to ninth embodiments can be appropriately changed without departing from the spirit of the present invention.
[0202]
【The invention's effect】
According to the first or twelfth aspect of the present invention, when an undefined variable is included in a coordinate range for displaying a graph, a temporary range is assigned to the undefined variable to set a coordinate range, and the graph is displayed. Can be displayed. That is, when a specific numerical value is not specified as the coordinate range, the graph can be displayed by specifying the coordinate range. Therefore, it is possible to support the user's thinking at the time of calculation and to improve the convenience of the electronic device having the graph display function.
[0203]
According to the second aspect of the present invention, when an undefined variable is included in a coordinate range for displaying a graph, the graph is displayed in a coordinate range in which a temporary value is assigned to the undefined variable, and then the graph is displayed. The coordinate value corresponding to the position of the trace pointer can be calculated and displayed.
[0204]
According to the third aspect of the present invention, when the same undefined variable is included in the coordinate range with the graph-based command, the value to be substituted for the undefined variable is reset as appropriate so that the graph fits in the coordinate range. Can be displayed.
[0205]
According to the fourth aspect of the present invention, when an undefined variable is included in a scale value, it is possible to display a scale by substituting a temporary value for the undefined variable.
[0206]
According to the invention as set forth in claim 5 or 13, when a graph expression includes an undefined variable, a temporary value is assigned to the undefined variable, a graph is displayed, and a condition is set. The graph can be updated and displayed.
[0207]
According to the invention as set forth in claim 6, when an undefined variable is included in a graph expression, a temporary value is assigned to the undefined variable, and the graph is displayed. The condition of the value that the undefined variable can take can be set accordingly.
[0208]
According to the invention described in claim 7, it is possible to set the condition of a value that can be taken by the undefined variable by the operation input means.
[0209]
According to the invention described in claim 8, it is possible to set a graph condition and display a graph having a line width representing all the graphs satisfying the set condition.
[0210]
According to the invention described in claim 9 or 14, when an undefined variable is included in a table condition for creating a list table based on a mathematical expression, a character expression in which the undefined variable is substituted into the mathematical expression Can be created and displayed. That is, the list table can be displayed even if the table condition includes an undefined variable.
[0211]
According to the tenth aspect, when a table condition for creating a list table based on a mathematical expression includes an undefined variable, a character expression in which the undefined variable is substituted for the mathematical expression is used as an element. Can be created, and a part of the range of the created list table can be omitted and displayed. In addition, elements in the omitted range can be represented by a general formula. That is, even if an undefined variable is included in the table condition, it is possible to display the list table and to display the elements of the displayed portion with a part omitted.
[0212]
According to the invention of claim 11 or 15, when an undefined variable is included in a mathematical expression, an increase / decrease table is created and displayed according to the types of poles and inflection points that can be taken by the undefined variable. Can be. That is, it is possible to create and display an increase / decrease table based on a mathematical expression including an undefined variable.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of the appearance of a scientific calculator to which the present invention is applied.
FIG. 2 is a block diagram showing an internal configuration of the scientific calculator shown in FIG.
FIG. 3 is a diagram illustrating a configuration of a RAM according to the first embodiment.
FIG. 4 is a diagram illustrating a configuration of a ROM according to the first embodiment.
FIG. 5 is a flowchart illustrating the operation of the scientific calculator according to the first graph drawing process.
FIG. 6 is a diagram showing a transition example of a display screen displayed on a display unit in the operation shown in the flowchart of FIG.
FIG. 7 is a diagram illustrating a configuration of a RAM according to a second embodiment;
FIG. 8 is a diagram illustrating a configuration of a ROM according to a second embodiment.
FIG. 9 is a flowchart for explaining the operation of the scientific calculator according to the second graph drawing process.
10 is a diagram showing a transition example of a display screen displayed on a display unit in the operation shown in the flowchart of FIG.
FIG. 11 is a diagram illustrating a configuration of a RAM according to a third embodiment;
FIG. 12 is a diagram illustrating a configuration of a ROM according to a third embodiment.
FIG. 13 is a flowchart showing the operation of the scientific calculator according to the scale display process.
FIG. 14 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 15 is a diagram illustrating a configuration of a RAM according to a fourth embodiment;
FIG. 16 is a diagram illustrating a configuration of a ROM according to a fourth embodiment.
FIG. 17 is a flowchart showing the operation of the scientific calculator according to the graph display position designation processing.
18 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
19 is a diagram showing another display example of the display screen shown in FIG.
FIG. 20 is a diagram illustrating a configuration of a RAM according to a fifth embodiment.
FIG. 21 is a diagram illustrating a configuration of a ROM according to a fifth embodiment.
FIG. 22 is a flowchart showing the operation of the scientific calculator according to the condition setting graph drawing process.
23 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG. 22.
FIG. 24 is a diagram illustrating a configuration of a RAM according to a sixth embodiment;
FIG. 25 is a diagram illustrating a configuration of a ROM according to a sixth embodiment.
FIG. 26 is a flowchart showing the operation of the scientific calculator according to the condition satisfaction graph full drawing process.
FIG. 27 is a diagram showing a transition example of a display screen displayed on a display unit in the operation shown in the flowchart of FIG. 26;
FIG. 28 is a diagram illustrating a configuration of a RAM according to a seventh embodiment.
FIG. 29 is a diagram illustrating a configuration of a ROM according to a seventh embodiment.
FIG. 30 is a flowchart showing the operation of the scientific calculator according to the table display processing.
31 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG. 30.
FIG. 32 is a diagram illustrating a configuration of a RAM according to an eighth embodiment.
FIG. 33 is a diagram showing a configuration of a ROM according to the eighth embodiment.
FIG. 34 is a flowchart showing the operation of the scientific calculator according to the table selection portion display processing.
35 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG. 34.
FIG. 36 is a diagram illustrating a configuration of a RAM according to a ninth embodiment;
FIG. 37 is a diagram illustrating a configuration of a ROM according to a ninth embodiment;
FIG. 38 is a flowchart showing the operation of the scientific calculator according to the increase / decrease table display processing.
39 is a diagram showing an example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG. 38.
40 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG. 38.
[Explanation of symbols]
1 Scientific calculator
2 Display
3 key group
4 Input pen
10 CPU
20 Input section
30 tablets
31 Position detection circuit
40 Display
41 Display drive circuit
50, 250, 350, 450, 550, 650, 750, 850, 950 RAM
51 Display range setting data
51a Display range temporary substitution value data
51b Scale value temporary substitution value data
52 Graph data
52a Graphical data
52b Graph-type temporary substitution value data
53 Coordinate value data
54 Command data
54a Command temporary substitution value data
55 Formula data
56 Condition data
57 Table display range setting data
58 Table data
58a General formula data
59 Change table data
70, 270, 370, 470, 570, 670, 770, 870, 970 ROM
71 1st graph drawing processing program
271 Second Graph Drawing Processing Program
371 Scale display processing program
372 scale number default data
471 Graph display position specification processing program
571 Condition setting graph drawing processing program
671 Condition Satisfaction Graph All Drawing Processing Program
771 Table display processing program
871 Table selection part display processing program
971 change table display processing program
90 storage device
100 storage media
RW display range setting window
GW graph window
CW command window
FW formula window
WW type display field
IA condition data input field
TRW table display range setting window
TW table window
SH ellipsis
TD trace data display
ATW change table window

Claims (15)

Coordinate range input means for inputting a coordinate range for displaying a graph,
Determining means for determining whether an undefined variable is included in the coordinate range input by the coordinate range input means,
When the determination unit determines that the coordinate range includes an undefined variable, the control unit sets a provisional value to the undefined variable and displays a graph for the coordinate range in which the set provisional value is substituted. Graph display control means for performing
An electronic device with a graph display function, comprising: Trace pointer display control means for controlling display of a trace pointer that moves in response to a movement operation on a graph whose display is controlled by the graph display control means;
When the discriminating means determines that the coordinate range includes an undefined variable, a control for calculating the position of the trace pointer in the coordinate range using the undefined variable and displaying the position as a coordinate value. Coordinate value display control means for performing
The electronic device according to claim 1, further comprising: Command input means for inputting a graph command for uniquely specifying a graph expression,
A second determination unit that determines whether the same undefined variable is included in the graph-based command input by the command input unit and the coordinate range input by the coordinate range input unit;
Further comprising
The graph display control means is means for performing control for displaying a graph of a graph type specified by a graph command input by the command input means, and includes the same undefined variable by the second determination means. When it is determined that the tentative value has been substituted, it is determined based on predetermined accommodation conditions whether or not the graph of the graph formula falls within the coordinate range into which the temporary value has been substituted, and when it is determined that the graph does not fit. 3. The electronic apparatus according to claim 1, further comprising: means for resetting a provisional value so as to satisfy the accommodation condition and performing control for displaying the graph of the graph. Scale value input means for inputting a scale value representing a value of one unit of the scale;
Third determining means for determining whether an undefined variable is included in the scale value input by the scale value input means,
When it is determined by the third determination means that the scale value includes an undefined variable, a temporary value is set for the undefined variable, and the scale is displayed with the scale value obtained by substituting the set temporary value. Scale display control means for performing control to perform
The electronic device according to claim 1, further comprising: An electronic device with a graph display function that performs control to display a graph of a graph expression including an undefined variable,
Display control means for setting a provisional value to the undefined variable, and performing control to display a graph of the graph formula in which the set provisional value is substituted.
Condition setting means for setting a condition of a possible value of the undefined variable by a predetermined operation input;
By calculating a value that satisfies the condition set by the condition setting means, resetting a new value to the undefined variable, and substituting the reset value, the graph of the graph formula is replaced with a new graph. Update display control means for controlling the update display on
An electronic device comprising: The condition setting unit is configured to execute a movement instruction operation or a deformation instruction operation on a graph display-controlled by the display control unit, based on a graph formula specified by the graph after the instruction operation, a possible value of the undefined variable. 6. The electronic apparatus according to claim 5, further comprising: means for setting the following conditions. 6. The electronic apparatus according to claim 5, wherein the condition setting unit includes an operation input unit that sets a condition of a value that the undefined variable can take by an operation input. When it is determined that the value satisfying the condition set by the condition setting means has a certain range, the update display control means updates and displays the graph having the line width as the new graph as the new graph. The electronic device according to claim 5, further comprising a control unit. Formula input means for inputting a formula,
Table condition input means for inputting a table condition for creating a list table of formulas input by the formula input means,
Determining means for determining whether an undefined variable is included in the table condition input by the table condition input means,
When the determination unit determines that the table condition includes an undefined variable, a list table is created and displayed as a character expression obtained by substituting the undefined variable into the mathematical expression. List table display control means for controlling
An electronic device comprising: The table condition input means has a range input means for inputting a range of a list table to be created,
The list table display control means includes an abbreviated sign display control means for performing control to display an abbreviated sign when the list table is displayed by omitting a part of the range of the list table input by the range input means. With
Cursor display control means for performing control to move on the list table display-controlled by the list table display control means in accordance with a moving operation and to display a cursor indicating an element of the list table,
When the cursor is positioned on the abbreviated sign, generalized display control means for performing control to generalize and display the mathematical expression input by the mathematical expression input means,
The electronic device according to claim 9, further comprising: Formula input means for inputting a formula,
Determining means for determining whether or not an undefined variable is included in the mathematical expression input by the mathematical expression input means;
An increase / decrease table creating means for creating an increase / decrease table for the mathematical expression according to the types of poles and inflection points that the undefined variable can take when the mathematical expression includes an undefined variable; When,
Increase / decrease table display control means for controlling to display each increase / decrease table created by the increase / decrease table creation means;
An electronic device comprising: On the computer,
A coordinate range input function for inputting a coordinate range for displaying a graph,
A determination function of determining whether or not an undefined variable is included in the coordinate range input by the coordinate range input function;
When it is determined that the undefined variable is included in the coordinate range by the determination function, a provisional value is set to the undefined variable, and a graph is displayed for the coordinate range in which the set provisional value is substituted. Graph display control function to perform
The program to realize. On the computer,
A display control function of setting a provisional value to an undefined variable included in the formula and performing control to display a graph of the formula in which the set provisional value is substituted;
A condition setting function for setting a condition of a possible value of the undefined variable by a predetermined operation input;
By calculating a value that satisfies the condition set by this condition setting function, resetting a new value to the undefined variable, and substituting the reset value, the graph of the mathematical formula is converted to a new graph. An update display control function for controlling the update display;
The program to realize. On the computer,
A formula input function for inputting formulas,
A table condition input function for inputting a table condition for creating a list table of formulas input by the formula input function,
A determination function for determining whether an undefined variable is included in the table condition input by the table condition input function,
When it is determined by the determination function that the table condition includes an undefined variable, a list table is created and displayed as a character expression obtained by substituting the undefined variable into the mathematical expression. List table display control function to control
The program to realize. On the computer,
A formula input function for inputting formulas,
A determination function for determining whether or not an undefined variable is included in a formula input by the formula input function;
An increase / decrease table creation function for creating an increase / decrease table for the mathematical expression according to the types of poles and inflection points that can be taken by the undefined variable when it is determined by the determination function that the mathematical expression includes an undefined variable. When,
An increase / decrease table display control function for controlling to display each increase / decrease table created by the increase / decrease table creation function;
The program to realize.

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