JP5392343B2 - Electronic device and program - Google Patents

Description

The present invention relates to an electronic device and a program.

  2. Description of the Related Art Conventionally, a graph display device that displays a graph of a function expression can display a trace pointer at an arbitrary point on a graph and display the position coordinates of the trace pointer (for example, Patent Document 1). reference).

JP 2003-131655 A

However, in the conventional graph display apparatus, it is to view superimposed image of the image data, and sets the display range of the graph for the image can not Rukoto give a value on the Y-axis problem in the graph.

An object of the present invention is to make it possible to create an image file that can appropriately display an image of image data superimposed on a graph.

In order to solve the above problems, the invention according to claim 1 is an electronic device.
Display means;
A display range storage unit for storing a display range composed of an upper limit value and a lower limit value in the horizontal axis direction and the vertical axis direction of the graph displayed on the display means;
Image storage means for storing a plurality of image data;
Image data designating means for designating any one of the plurality of image data;
Coordinate axis display control means for causing the display means to display the coordinate axes in the vertical axis direction and the horizontal axis direction according to the display range stored in the display range storage unit;
Display range resetting means for resetting the display range stored in the display range storage unit by a user operation;
A file storage means for adding the reset display range as additional data to the designated image data and storing it as a file;
With
The designated image data is image data having a horizontal reference line that coincides with the coordinate axis in the horizontal axis direction when a graph is drawn on the image according to the display range of the additional data ,
When the image of the image data is displayed superimposed on the coordinate axis corresponding to the display range of the additional data, the additional data is set so that the displayed coordinate axis in the horizontal axis direction matches the reference line in the left-right direction. Display range is set,
It is characterized by that.

The invention according to claim 2 is an electronic apparatus,
Display means;
A display range storage unit for storing a display range composed of an upper limit value and a lower limit value in the horizontal axis direction and the vertical axis direction of the graph displayed on the display means;
Image storage means for storing a plurality of image data;
Image data designating means for designating any one of the plurality of image data;
Graph display control means for causing the display means to display the coordinate axes in the vertical axis direction and the horizontal axis direction according to the display range stored in the display range storage unit, and to display a graph in a coordinate system determined by the display range. When,
Display range resetting means for resetting the display range stored in the display range storage unit by a user operation;
A file storage means for adding the reset display range as additional data to the designated image data and storing it as a file;
With
The designated image data includes image data having a reference point that coincides with the origin corresponding to the coordinate axes in the vertical axis direction and the horizontal axis direction when a graph is drawn on the image according to the display range of the additional data. And
When the image of the image data is displayed superimposed on the coordinate axis corresponding to the display range of the additional data, the origin and the reference point corresponding to the displayed vertical axis and horizontal axis are displayed. The display range of the additional data is set so as to match.

According to the present invention, it is possible to create an image file that can appropriately display an image of image data superimposed on a graph .

It is a top view which shows schematic structure of a graph display system. It is a block diagram which shows the function structure of a personal computer. It is a figure which shows a coordinate range storage table. It is a figure which shows the data structure of an image file. It is a block diagram which shows the function structure of a scientific calculator. It is a flowchart which shows the flow of an image coordinate range setting process. It is a flowchart which shows the flow of a function graph display process. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display. It is a figure which shows the display content of a display.

Hereinafter, an example of an embodiment according to the present invention will be described in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.
[1. Configuration of graph display system]
FIG. 1 is a conceptual diagram showing a schematic configuration of a graph display system 900.
As shown in this figure, the graph display system 900 includes a personal computer 200 and a scientific calculator 1.

[1-1. Computer configuration]
First, the personal computer 200 will be described.
FIG. 2 is a block diagram showing a schematic configuration of the personal computer 200.

As shown in this figure, a personal computer 200 includes an input unit 201, a display unit 202, a communication unit 203, a recording medium reading unit 207, a flash ROM (Read Only Memory) 204, a RAM (Random Access Memory) 205, and a CPU (Central Processing). Unit) 206 and the like, and each functional unit is connected by a bus.

  The input unit 201 includes an input key group 210 and a mouse 211, and outputs signals input via the input key group 210 and the mouse 211 to the CPU 206. It should be noted that the mouse 211 in the present embodiment is configured to receive a mathematical expression input operation using a GUI (Graphical User Interface) by cooperating with the display unit 202.

  The display unit 202 includes a display 220 and displays various types of information on the display 220 based on signals from the CPU 206. The display 220 is described as being composed of a dot matrix liquid crystal, but it goes without saying that other display devices such as TFT (Thin Film Transistor) liquid crystal and PDP (Plasma Display Panel) may be used.

The communication unit 203 performs data communication with the scientific calculator 1. Note that communication may be performed wirelessly or wired.
The recording medium reading unit 207 reads information from a recording medium 207A such as a USB memory that is detachably mounted.

  The flash ROM 204 stores various programs related to operations such as menu display processing, various setting processing, various arithmetic processing, etc. in the personal computer 200, programs for realizing various functions of the personal computer 200, and the like. In the embodiment, an image coordinate setting program 240, a coordinate range storage table 241, an image data group 242, and an image file group 244 are stored.

  The image coordinate setting program 240 is a program for causing the CPU 206 to execute an image coordinate range setting process (see FIG. 6) described later.

  As shown in FIG. 3A, the coordinate range storage table 241 has an X-axis direction and a Y-axis direction when the XY coordinate system determined by the XY axes displayed on the scientific calculator 1 is enlarged or reduced in stages. A plurality of combinations are stored for the default upper limit value and lower limit value. Here, the X-axis numerical range (= the upper limit value of the X-axis display range−the lower limit value) for each combination is 1 / integer of the number of dots in the X-axis direction on the display 3 of the scientific calculator 1 described later. The interval between integer values can be expressed with an integer number of dots. For example, the X-axis numerical range “25.2” (= 12.6 − (− 12.6)) in the first-stage combination is the number of dots “378” in the X-axis direction of the display 3 in the present embodiment. The scale interval of each integer value can be expressed by 15 dots. Similarly, the numerical value width “18.9” in the second stage is 1/20 of the number of dots “378”, and the numerical width “12.6” in the third stage is “9.45 − (− 9.45)”. (= 6.3 − (− 6.3)) is 1 / 30th of the number of dots “378” and the numerical value width “10.5” (= 5.25 − (− 5.25)) of the fourth stage is The 1 / 36th of the number of dots “378” and the numerical range “9.45” (= 4.725− (4.725)) of the fifth stage are 1 / 40th and the sixth stage of the number of dots “378”. The numerical value width “7.56” (= 3.78 − (− 3.78)) is 1/50 of the number of dots “378”. In the figure, the numerical value in the leftmost column indicates the stage of enlargement or reduction. For example, “0” is a state where the enlargement / reduction is not performed, “1” is a state where the stage is enlarged one stage, and “−1” is one stage. A reduced state is shown.

  The image data group 242 stores a plurality of image data 243 for images displayed on the coordinate calculator 1 so as to overlap the coordinate system. Here, the image of each image data 243 in the present embodiment is a reference line (hereinafter referred to as a reference line L) when a graph is drawn on the image, for example, as shown in FIG. And a reference point (hereinafter referred to as a reference point P) for drawing a graph on the reference line L.

  The image file group 244 stores a plurality of image files 245. Each image file 245 includes image data 243 and additional data 246, as shown in FIG.

This additional data 246 indicates the display range of the coordinate system (values of the maximum and minimum coordinates of XY; that is, Xmin, Xmax, Ymin, Ymax) to be associated with the image of the image data 243 and the scale interval of each coordinate axis. . Note that, in the additional data 246 in the present embodiment, when the image of the image data 243 is superimposed on the XY coordinate system by an image coordinate range setting process (see FIG. 6) described later, the reference line L of the image is set to the X axis. The display range of the coordinate system is set so that they match and the reference point P of the image matches the origin of the coordinate system (see FIG. 11A).

  The RAM 205 is a memory that can be written at any time to temporarily hold various programs executed by the CPU 206 and data related to the execution of these programs.

  Based on the input instruction, the CPU 206 reads a predetermined program from the flash ROM 204, temporarily stores it in the RAM 205, executes various processes based on the program, and centrally controls each unit of the personal computer 200. That is, the CPU 206 executes various processes based on the read predetermined program, stores the processing results in the work area in the RAM 205, and causes the display unit 202 to display them.

[1-2. Structure of scientific calculator]
[1-2-1. Appearance configuration]
Next, the scientific calculator 1 will be described.
As shown in FIG. 1 described above, the scientific calculator 1 includes an input key group 2 having various key groups and a display 3.

  The input key group 2 is a key group for receiving an input operation of a mathematical expression component such as a numerical value or an arithmetic symbol from a user or an instruction operation of various processes, and a plurality of keys each assigned a unique function. Has a key. In the present embodiment, the input key group 2 includes a numeric keypad 20, an operation symbol key 21, a cursor key 22, an EXE key 23, a delete key 24, a shift key 25, a function key 26, a menu key 27, an EXIT key 28, and the like. ing.

  Among these keys, the numeric keypad 20 is a key for receiving a numerical input operation, and the arithmetic symbol key 21 is a symbol for arithmetic operations, parentheses, a tie line for fractions, a root sign (√), a logarithmic symbol, a constant (circumference “π”). And the speed of light “c”, etc.), a key for receiving input operations of various arithmetic symbols such as a trigonometric function symbol.

  The cursor key 22 is a key that is pressed when the cursor indicating the editing target position or the selection target position is moved in a predetermined direction in the display 3. In the present embodiment, the cursor key 22 is input in four directions, up, down, left, and right. It is configured to be possible.

  The EXE key 23 is a key that receives an input operation of a process execution instruction or a determination instruction, and functions as a key that instructs execution of an arithmetic process after inputting a mathematical expression, for example. The delete key 24 is a key for receiving a delete operation such as a numerical value or a calculation symbol displayed on the display 3. The shift key 25 is a key that is pressed in combination with other keys when switching the function of each key.

  The function key 26 has a plurality of keys for receiving an instruction to execute a predetermined process. In the present embodiment, the function key 26 has six keys 26a to 26f "F1" to "F6". Among these, the “F1” key 26a is a key operated when a graph trace is instructed in a function graph display process (see FIG. 7) described later. The “F2” key 26 b is a key operated when enlarging or reducing the display range of the coordinate system displayed on the display 3. The “F3” key 26c is a key operated when setting / checking the view window information, and the “F6” key 26f displays the display contents on the display 3, a graph, a graph expression of the graph, or a data table. This key is operated when switching between the two. Here, the view window information is information indicating the display mode of the XY coordinate system. In the present embodiment, the display range of the XY coordinate system (the values of the maximum and minimum coordinates of XY; that is, Xmin, Xmax, Ymin, Ymax), the scale interval (Xscl, Yscl) of each coordinate axis, and the dot interval (X dot) in the X-axis direction during graph display. The dot interval in the X-axis direction (X dot) is the numerical value on the X-axis corresponding to the dot pitch in the horizontal direction (X-axis direction) when the display 3 displays the X-axis in the horizontal direction on the full screen This is a value obtained by dividing the X-axis numerical value width (Xmax−Xmin) by the number of dots in the X-axis direction on the display 3. When the graph is displayed, the Y value of the graph formula is calculated from the minimum coordinate value of X in dot interval units, plotted at the position of the corresponding coordinate within the display range, and displayed as a graph.

  The menu key 27 is a key for calling up a menu for executing each function in the scientific calculator 1. The EXIT key 28 is a key that is pressed when instructing the end of various processes in the scientific calculator 1.

  The display 3 is composed of an LCD (Liquid Crystal Display), an ELD (Electronic Luminescent Display), etc. In addition to characters, symbols, mathematical formulas, calculation results, etc. according to the operation of the input key group 2, the scientific calculator 1 is provided. Various data necessary for use is displayed by a plurality of dots. In the display 3 in the present embodiment, the X axis is displayed in the horizontal direction, the Y axis is displayed in the vertical direction, and the XY coordinate system is displayed by the XY axis. The number of dots in the X axis direction is “378”. Further, the display 3 in the present embodiment is integrally provided with a touch panel 30 over the entire display screen.

[1-2-2. Functional configuration]
Next, the functional configuration of the scientific calculator 1 will be described.
FIG. 5 is a block diagram illustrating a schematic functional configuration of the scientific calculator 1.

  As shown in the figure, the scientific calculator 1 includes a key input unit 14, a display unit 15, a communication unit 16, a recording medium reading unit 17, a RAM (Random Access Memory) 12, a storage unit 13, and a CPU. (Central Processing Unit) 11.

  The key input unit 14 includes the input key group 2 described above, and outputs an operation signal corresponding to the pressed key to the CPU 11.

  The display unit 15 includes the display 3 described above, and displays various types of information on the display 3 in accordance with display signals from the CPU 11. Further, the display unit 15 includes a touch panel 30 provided integrally with the display 3, and outputs contact position information of the input pen with respect to the display screen to the CPU 11.

The communication unit 16 performs data communication with the communication unit 203 in the personal computer 200. Note that the communication unit 16 in the present embodiment receives the image file 245 from the personal computer 200 and stores it in the storage unit 13.
The recording medium reading unit 17 reads information from a recording medium 207A such as a USB memory that is detachably mounted.

  The RAM 12 is a volatile memory that temporarily stores information, and has a plurality of work areas that store various programs to be executed and data related to these various programs. For example, the RAM 12 in the present embodiment has a mathematical expression storage area 120, a view window information storage area 121, and the like as work areas.

  The mathematical formula storage area 120 stores a graph formula that is input in a function graph display process (see FIG. 7) described later.

In the view window information storage area 121, view window information set in a function graph display process (see FIG. 7) described later is stored. In this embodiment, the X-axis is used as a default value. Display range “Xmin: −6.3, Xmax: 6.3”, scale interval “Xscl: 1”, Y axis display range “Ymin: −3.1, Ymax: 3.1”, scale interval “Yscl: 1 ”, dot spacing in the X-axis direction“ X dot: 0.033... ”(= (6.3-(− 6.3))
/ 378) is stored. Note that the X-axis numerical range “12.6” (= Xmax−Xmin = 6.3 − (− 6.3)) by the default value is an integral number of the number of dots “378” in the X-axis direction on the display 3. The interval between the scales for integer values can be expressed by an integer number of dots.

  The storage unit 13 is a non-volatile memory composed of a ROM (Read Only Memory) or the like, and stores various programs and various data. Specifically, the storage unit 13 stores a function graph display program 130 as a program according to the present invention and an image file group 131.

  The function graph display program 130 is a program for causing the CPU 11 to execute a function graph display process (see FIG. 7) described later.

  The image file group 131 stores a plurality of image files 245 transmitted from the personal computer 200 via the communication unit 16.

  The CPU 11 centrally controls each part of the scientific calculator 1. Specifically, the CPU 11 expands a program specified from the system program and various application programs stored in the storage unit 13 in the RAM 12 and performs various processes in cooperation with the program expanded in the RAM 12. Run.

[2. Operation of graph display system]
[2-1. PC operation]
Next, the operation of the personal computer 200 will be described.

  FIG. 6 is a flowchart for explaining the operation of the image coordinate range setting process executed in the personal computer 200. In this image coordinate range setting process, when an execution instruction for the image coordinate range setting process is input by the user via the input unit 201, the image coordinate setting program 240 is read from the flash ROM 204 and appropriately expanded in the RAM 205. As a result, the image coordinate setting program 240 and the CPU 206 are executed in cooperation.

  As shown in this figure, in the image coordinate range setting process, first, when the user designates any image data 243 from the image data group 242 as designated image data (hereinafter designated designated data data 243S) (step S1). The CPU 206 displays the image of the designated image data 243S on the display 220 (step S2).

  Next, the CPU 206 sets the upper limit value and lower limit value of the coordinate axes to be displayed, that is, the display range of the coordinate system (XY minimum and maximum coordinate values; Xmin, Xmax, Ymin, Ymax) as default values (step S3). In this embodiment, in this step S3, the CPU 206 sets the lower limit value and upper limit value of the X axis to “Xmin: −3.1”, “Xmax: 3” based on the information in the coordinate range storage table 214. .1 ”, and the lower and upper limits of the Y axis are“ Ymin: −6.3 ”and“ Ymax: 6.3 ”.

  Next, when the user inputs the scale intervals (Xscl, Yscl) of the X axis and the Y axis (step S4), the CPU 206 places the XY axes on the image of the designated image data 243S within the display range set at the present time. The scale is displayed on each coordinate axis at the scale interval input in step S4, and the X-axis and Y-axis values at the edge of the image (X-axis values at the left and right edges of the image and Y at the upper and lower ends) (Axis value) and the scale interval are displayed in the outer area of the image (step S5). At this time, the CPU 206 calculates the dot interval in the X-axis direction by dividing the X-axis numerical value width (Xmax−Xmin) by the number of dots in the X-axis direction on the display 3 and displays it in the outer area of the image.

Next, the CPU 206 displays each scale of the X axis at the scale interval (Xscl) input in step S4 among the combination of the upper limit value and the lower limit value (Xmin, Xmax, Ymin, Ymax) in the coordinate range storage table 241. A combination that can be positioned on the three dots, that is, a combination that can be expressed by an integer number of dots between the scales of the X axis at the scale interval (Xscl) input in step S4 is read (step S6). More specifically, at this time, the CPU 206 determines that the value obtained by dividing the X-axis numerical value width (Xmax−Xmin) by the scale interval (Xscl) is X in the display 3.
When the number of dots in the axial direction is 1 / integer, it is determined that an interval between each scale can be expressed by an integer number of dots.

Specifically, for example, when the X-axis scale interval (Xscl) is set to “0.2”,
As shown in FIG. 3B, the X-axis numerical value width “10.5” (= 5.25-(− 5.25)) in the third step from the bottom is divided by the scale interval “0.2”. Since the obtained value “52.5” (= 10.5 / 0.2) is not an integral number of the number of dots “378” in the X-axis direction on the display 3, it cannot be expressed by an integer number of dots. As a result, it is not read from the coordinate range storage table 241.

Next, the CPU 206 determines whether or not the user performs a zoom operation (step S7). If it is determined that the user has performed a zoom operation (step S7; Yes), the image of the designated image data 243S is displayed on the display 220 as it is. In the coordinate system display range, the combination of the upper limit value and the lower limit value corresponding to the zoom operation among the combinations of the upper limit value and the lower limit value (Xmin, Xmax, Ymin, Ymax) of the XY axes read out in step S6 is displayed. Is set again (step S8), and then the process proceeds to step S5.

  If it is determined in step S7 that the zoom operation is not performed (step S7; No), the CPU 206 determines whether the user performs an up / down / left / right movement operation (step S9).

If it is determined in step S9 that the moving operation has been performed (step S9; Yes), the display range of the XY coordinate system is moved in the direction indicated by the moving operation, and the display range of the coordinate system (Xmin, Xmax, Ymin, Ymax) is reset (step S10), and then the process proceeds to step S5.

  Further, when it is determined in step S9 that the moving operation is not performed (step S9; No), the CPU 206 determines whether or not the storage operation is performed by the user (step S11), and is determined not to be performed. If so (step S11; No), the process proceeds to another process.

If it is determined in step S11 that the save operation has been performed (step S11; Yes), the CPU 206 causes the user to input a file name (step S12), and then displays the coordinate system in the designated image data 243S. The image file 245 is formed by adding the range (value of the maximum and minimum coordinates of XY; Xmin, Xmax, Ymin, Ymax) and the scale interval (Xscl, Yscl) as additional data 246, corresponding to the input file name In addition, the image data is stored in the flash ROM 204 (step S13), and the image coordinate range setting process is terminated.

[2-2. Operation of scientific calculator]
Next, the operation of the scientific calculator 1 will be described.

  FIG. 7 is a flowchart for explaining the operation of the function graph display process. In this function graph display process, when a user inputs an instruction to execute the function graph display process via the touch panel 30 or the key input unit 14, the function graph display program 130 is read from the storage unit 13 and stored in the RAM 12. As a result of appropriate expansion, the function graph display program 130 and the CPU 11 are executed in cooperation.

  As shown in this figure, in the function graph display process, first, when the user designates any image file 245 in the image file group 131 as a background image of the coordinate system (step T1), the CPU 11 designates the designated image file. The image 245 is displayed on the display 3 (step T2).

  Next, the CPU 11 determines whether or not an operation for setting the additional data 246 added to the image file 245 as view window information is performed (step T3), and when it is determined that the operation is not performed (step T3). No), the view window information is maintained at the default value in the view window information storage area 121, and the process proceeds to Step T5 described later.

If it is determined in step T3 that an operation for setting the additional data 246 as view window information has been performed (step T3; Yes), the CPU 11 stores the contents of the additional data 246 added to the image file 245, In other words, the view window information shows the display range of the coordinate system (values of the maximum and minimum coordinates of XY; Xmin, Xmax, Ymin, Ymax) and scale intervals (Xscl, Yscl), and the dot interval in the X-axis direction calculated from these contents To update the information in the view window information storage area 121 (step T4).

  Next, the CPU 11 determines whether or not an operation for confirming the view window information is performed (step T5). When it is determined that the operation is not performed (step T5; No), the CPU 11 proceeds to step T7 described later. Transition. In the present embodiment, a display instruction operation for view window information is performed via the “F3” key 26c.

  If it is determined in step T5 that an operation for confirming the view window information has been performed (step T5; Yes), the CPU 11 displays the view window information in the view window information storage area 121 on the display 3. (Step T6).

Next, the CPU 11 causes the user to set up the display mode (step T7). In this step T7, the user sets “Axes” (XY axes) to “on” (displays the coordinate axes), “off” (hides the coordinate axes), “scale” (with scale value) Or “Label” (XY coordinate axis name and origin position “0”)
)) Is set to either “on” (display) or “off” (hide) or “Grid”
”(Grid) is set to“ on ”(grid points are displayed),“ off ”(grid is not displayed),
It is possible to set “line” (display grid lines). However, in this embodiment, the setting of “Axes” (XY axes) is set to either “on” (displays coordinate axes) or “scale” (displays coordinate axes with scale values). I will explain that.

Next, the CPU 11 allows the user to input a graph expression (step T8), and then displays the image of the image file 245 specified in the above-described step T1 on the background while viewing the window information in the view window information storage area 121. The XY axes and the scales of the respective axes are displayed based on the display mode setup contents, and a graph of a graph type is displayed in the XY coordinate system determined by the XY axes (step T9). For example, when “Axes” is set to “scale” in the display mode setup, the CPU 11 displays the X axis and the Y axis in step T9, and the scale interval of the view window information on these XY axes. Display the scale and scale value with (Xscl, Yscl).

Here, in this view window information, the numerical width of the X axis is such that the value obtained by dividing the numerical width of the X axis (Xmax−Xmin) by the scale interval (Xscl) is 1 / integer of the number of dots in the X axis direction. Therefore, each graduation on the X axis is positioned on a dot on the display 3. Further, in the additional data 246 added to the image file 245, when the image of the image data 243 is superimposed on the XY coordinate system, the reference line L of the image coincides with the X axis, and the reference point P of the image is the coordinate. Since the display range of the coordinate system (the values of the maximum and minimum coordinates of XY; Xmin, Xmax, Ymin, Ymax) is set so as to coincide with the origin of the system, the contents of this additional data 246 are displayed in the above-described step T4. When the window information is set, in the XY coordinate system overlaid on the image of the image data 243, the reference line L coincides with the X axis, and the reference point P coincides with the origin.

  Next, the CPU 11 determines whether or not an operation for tracing a point on the graph is performed (step T10). When it is determined that the operation is not performed (step T10; No), the CPU 11 proceeds to another process. Transition. In the present embodiment, a trace instruction is given via the “F1” key 26a.

  If it is determined in step T10 that an operation for tracing is performed (step T10; Yes), the CPU 11 determines an X coordinate value for the trace pointer T to be displayed (see FIG. 11C). Is set to an initial value (eg, “0”) (step T11).

  Next, the CPU 11 displays the trace pointer T at the corresponding point of the currently set X coordinate value among the points on the graph, and displays the XY coordinate of the trace pointer T on the lower portion of the display 3 ( Step T12).

  Next, the CPU 11 determines whether or not a left / right movement operation is performed on the trace pointer T (step T13). If it is determined that the operation has been performed (step T13; Yes), the trace is performed in the direction specified by the operation. After the X coordinate value of the pointer T is increased / decreased by a predetermined number of dots (“1” in the present embodiment) and reset (step T14), the process proceeds to step T12 described above.

  If it is determined in step T13 that the left / right movement operation is not performed on the trace pointer T (step T13; No), the CPU 11 determines whether an end operation is performed (step T15).

  When it is determined that the end operation is not performed (step T15; No), the CPU 11 proceeds to another process, whereas when it is determined that the end operation is performed (step T15; Yes), the function The graph display process ends.

[1.4 Operation example]
Next, the above-described operation in the personal computer 200 and the scientific calculator 1 will be specifically described with reference to the drawings.

(Operation example 1)
First, as shown in FIGS. 8A to 8C, the initial state (no graph expression is input (see FIG. 8A)) and the view window information is set to the default value (FIG. 8). 8 (b), (c)))))), as shown in FIGS. 8 (d) and 9 (a) to 9 (c), the user uses the image file 245 of “Pict01” as a background image. When designated (step T1), the image of the image file 245 is displayed on the display 3 (step T2). FIG. 8D illustrates a state in which the setting item “background” of the coordinate system background image is selected from the setup menu, and “None” (no background) and “PICTn” are displayed at the bottom of the display 3. A selection key 300 of “OPEN” (display an image read from an image file) is displayed as a soft key (displays an image designated by an image number). FIG. 9A shows a state in which “PICTn” is selected from the state of FIG. 8D, and the image file 245 of each image number can be selected. In addition, as shown in FIG. 9C, in this operation example, the image file 245 of “Pict01” is a file of an image obtained by photographing the fountain from the side. In this image, the water surface position is the reference line L, the fountain. Is the reference point P.

Next, as shown in FIG. 9D, when the user performs an operation to set the additional data 246 added to the image file 245 as view window information (step T3; Yes), FIG. , (B), the contents of the additional data 246 added to the image file 245, that is, the display range of the coordinate system (“Xmin: −6.3”, “Xmax: 6.3”, “Ymin”).
: −1.1 ”,“ Ymax: 5.1 ”) and graduation intervals (“ Xscl: 1 ”,“ Yscl: 1 ”) and the dot interval“ 0.033, ... ”Is set as the view window information, and the information in the view window information storage area 121 is updated (step T4).

Next, as shown in FIGS. 10C and 10D, the setting of “Axes” (XY axes) is set to “on” (coordinate axes are displayed), and “Label” (XY axis coordinate axis names and origin positions are set). Set “0”) to “on
”(Display),“ Grid ”(grid) is set to“ off ”(grid is not displayed), and the user sets up the display mode (step T7), and the graph expression“ Y = − (X−2) ² When “+4” is input (step T8), as shown in FIG. 11A, the image of the image file 245 is displayed in the background, and the view window information in the view window information storage area 121 and the setup of the display mode are displayed. The XY axes and the scales of the respective axes are displayed based on the contents, and a graph of the graph expression “Y = − (X−2) ² +4” is displayed in the XY coordinate system determined by the XY axes (step T9). . At this time, when the user operates the “F6” key 26f, the display content on the display 3 is switched to only the graph as shown in FIG.

Here, in this view window information, the value obtained by dividing the X-axis numerical value width (Xmax−Xmin) by the scale interval “Xscl: 1” is 1 / integer of the number of dots “378” in the X-axis direction. Since the numerical width “12.6” (= Xmax−Xmin = 3.1 − (− 3.1)) of the X axis is set, each scale of the X axis is positioned on a dot of the display 3. Become. In addition, the coordinate system display range (“Xmin: −6.3”, “X” is set so that the reference line L of the image of the image file 245 matches the X axis and the reference point P of the image matches the origin of the coordinate system. Xmax: 6.3 "," Ymin: -1.1
”,“ Ymax: 5.1 ”) is set, so that X to be overlaid on the image of the image data 243
In the Y coordinate system, the reference line L coincides with the X axis, and the reference point P coincides with the origin.

  Next, when the user performs an operation for tracing a point on the graph (step T10; Yes), the X coordinate value for the trace pointer T to be displayed is set to “0” (step T11). The trace pointer T is displayed at the corresponding point of the coordinate value “0”, the XY coordinates of the trace pointer T are displayed at the bottom of the display 3 (step T12), and the user moves the trace pointer T to the right. Is performed a plurality of times (step T13; Yes), as shown in FIG. 11C, the X coordinate value of the trace pointer T is increased and reset in the right direction (step T14), and the scale value “ 2 ”and the XY coordinates of the trace pointer T are displayed at the bottom of the display 3 (step T12). In this operation example, a graph expression is displayed on the upper left of the display 3 at this time. At this time, when the user operates the “F6” key 26f, as shown in FIG. 11D, the display content on the display 3 is switched to only the graph.

(Operation example 2)
First, when the user designates any image data 243 from the image data group 242 as designated image data 243S in the personal computer 200 (step S1), the image of the designated image data 243S is displayed on the display 220 as shown in FIG. In addition to being displayed (step S2), the display range of the coordinate system is a default value ("Xmin: -6.3", "Xmax: 6.3", "Ymin: -3.1", "Ymax: 3.1"). ]) (Step S3). In this operation example, the image of the designated image data 243S is obtained by shooting a free throw in basketball from the side. In this image, the ground position is the reference line L and the player's foot position is the reference point P. Yes.

Next, when the user inputs the X-axis scale interval as “Xscl: 0.5” and the Y-axis scale interval as “Yscl: 1” (step S4), the display range (“Xmin: -6.3 "," Xmax: 6.3 "," Ymin: -3.1 "," Ymax: 3.1 "), the XY axes are displayed on the image of the designated image data 243S and input scales Scales are displayed on the coordinate axes at intervals “Xscl: 0.5” and “Yscl: 1”, and X-axis and Y-axis values at the edge of the image (X-axis values “3” at the left and right edges of the image). .1 ”,“ −3.1 ”, Y axis values“ 6.3 ”,“ −6.3 ”) at the upper and lower ends, and scale intervals“ 0.5 ”(Xscl),“ 1 ”(Yscl Are displayed in the outer area of the image (step S5). At this time, the dot interval (X dot) in the X-axis direction is “0.033.
= 1/30) and displayed in the outer area of the image.

Next, among the combinations of the upper limit value and the lower limit value (Xmin, Xmax, Ymin, Ymax) in the coordinate range storage table 241, each scale on the X axis is set with the scale interval “Xscl: 0.5” input in step S4. Combinations that can be positioned on the dots of the display 3 (all combinations in FIG. 3A in this operation example) are read (step S6).

Next, when the user performs a zoom operation (step S7; Yes), the image of the designated image data 243S is displayed on the display 220 as it is, and the combination of the upper limit value and the lower limit value of the XY axes read in step S6 ( Xmin, Xmax, Ymin, Ymax) are combinations of upper and lower limits corresponding to zoom operations ("Xmin: -5.25", "Xmax: 5.25", "Ymin: -2.5833", “Ymax: 2.5833” (see the third row from the bottom in FIG. 3A) is reset as the display range of the coordinate system (step S8). Then, as shown in FIG. 12B, the currently set display range (“Xmin: −5.25”, “Xmax: 5.25”, “Ymin: −2.5833”, “Ymax: 2.5833 "), the XY axes are displayed on the image of the designated image data 243S, and scales are displayed on the coordinate axes at the input scale intervals" Xscl: 0.5 "," Yscl: 1 ", and the image X-axis and Y-axis values at the edges (X-axis values “5.25” and “−5.25” at the left and right edges of the image) and Y-axis values “2.5833” and “ -2.5833 ") and the input scale intervals" 0.5 "(Xscl)," 1 "(Yscl) are displayed in the outer area of the image (step S5). At this time, the dot interval (X dot) in the X-axis direction is calculated as “0.0277...” (= 1/36) and displayed in the outer area of the image.

Next, when the user performs a downward movement operation so that the X axis coincides with the reference line L of the image (step S9; Yes), the display range of the XY coordinate system is moved downward, and the coordinate system The display range (Xmin, Xmax, Ymin, Ymax) is reset (step S10). And FIG. 12 (c)
XY in the display range currently set ("Xmin: -5.25", "Xmax: 5.25", "Ymin: -0.4722", "Ymax: 4.6944")) The axis is displayed on the image of the designated image data 243S, the scale is displayed on each coordinate axis at the input scale intervals “Xscl: 0.5”, “Yscl: 1”, and the X axis at the end of the image, Y-axis values (X-axis values “5.25” and “−5.25” at the left and right ends of the image and Y-axis values “4.6944” and “−0.4722” at the upper and lower ends) The inputted scale intervals “0.5” (Xscl) and “1” (Yscl) are displayed in the outer area of the image (step S5). At this time, the dot interval (X dot) in the X-axis direction is calculated as “0.0277...” (= 1/36) and displayed in the outer area of the image.

Next, when the user performs a movement operation in the right direction so that the origin coincides with the reference point P of the image (step S9; Yes), the display range of the XY coordinate system is moved in the right direction, and the display of the coordinate system is performed. The range (Xmin, Xmax, Ymin, Ymax) is reset (step S10). And FIG. 13 (a)
XY in the display range currently set ("Xmin: -1.0277", "Xmax: 9.4722", "Ymin: -0.4722", "Ymax: 4.6944")) The axis is displayed on the image of the designated image data 243S, the scale is displayed on each coordinate axis at the input scale intervals “Xscl: 0.5”, “Yscl: 1”, and the X axis at the end of the image, Y-axis values (X-axis values “9.4722” and “−1.0277” at the left and right ends of the image and Y-axis values “4.6944” and “−0.4722” at the upper and lower ends) The inputted scale intervals “0.5” (Xscl) and “1” (Yscl) are displayed in the outer area of the image (step S5). At this time, the dot interval (X dot) in the X-axis direction is calculated as “0.0277...” (= 1/36) and displayed in the outer area of the image.

  Next, as shown in FIG. 13B, when the user performs a save operation (step S11; Yes) and inputs the file name “BASKET” (step S12), the display range (in the coordinate system) of the designated image data 243S ( “Xmin: −1.0277”, “Xmax: 9.4722”, “Ymin: −0.4722”, “Ymax: 4.6944”), scale intervals “Xscl: 0.5”, “Yscl: 1 Is added as additional data 246 to form an image file 245, which is stored in the flash ROM 204 in association with the input file name “BASKET” (step S13).

  Next, after the image file 245 is stored in the storage unit 13 via the communication unit 16, as shown in FIGS. 14A to 14D, the user has an image with the file name “BASKET” in the scientific calculator 1. When the file 245 is designated as a background image (step T1), the image of the image file 245 is displayed on the display 3 (step T2). FIG. 14B shows a state where “OPEN” is selected from the state of FIG. 14A, and the image file 245 can be selected from the file name.

  Next, when the user performs an operation to set the additional data 246 added to the image file 245 as view window information (step T3; Yes), as shown in FIGS. 15A and 15B, the image is displayed. The contents of the additional data 246 added to the file 245, that is, the display range of the coordinate system (“Xmin: −1.0277”, “Xmax: 9.4722”, “Ymin: −0.4722”, “Ymax: 4.. 6944 ”), scale intervals“ Xscl: 0.5 ”,“ Yscl: 1 ”, and dot interval“ 0.027,... ”Calculated from the content are set as view window information. Information in the window information storage area 121 is updated (step T4).

Next, the user sets the setting of “Axes” (XY axis) to “scale” (displays coordinate axes with scale values), and the setting of “Label” (the coordinate axis name of XY axes and the origin position “0”) to “ “on” (displayed) and “Grid” (grid) are set to “on” (grid is displayed) to set up the display mode (step T7). As shown in FIG. = −0.4 (X−2.5) ² +4.5 ”(step T8), the image of the image file 245 is displayed in the background and a view window as shown in FIG. Based on the view window information in the information storage area 121 and the content of the setup of the display mode, the XY axes and the scales of the respective axes are displayed, and a graph expression “Y = −0.4 ( ^X-2.5) 2 +4.5 " Graph is displayed (step T9). If the user operates the “F6” key 26 f at this time, the display content on the display 3 is switched to only the graph as shown in FIG.

  Here, in this view window information, a value obtained by dividing the X-axis numerical value (Xmax−Xmin) by the scale interval “Xscl: 0.5” is 1 / integer of the number of dots “378” in the X-axis direction. Since the X-axis numeric width “10.4999” (= Xmax−Xmin = 9.4722 − (− 1.0277)) is set, each scale of the X axis is positioned on a dot of the display 3. It will be. In addition, the display range of the coordinate system (“Xmin: −1.0277”, “X”: “Xmin: −1.0277”, “X”) is set so that the reference line L of the image of the image file 245 matches the X axis, Xmax: 9.4722 ”,“ Ymin: −0.4722 ”,“ Ymax: 4.6944 ”) are set, and in the XY coordinate system overlaid on the image of the image data 243, the reference line L is the X axis. And the reference point P matches the origin.

  Next, when the user performs an operation to trace a point on the graph (step T10; Yes), the X coordinate value for the trace pointer T to be displayed is set to “0” (step T11), and FIG. As shown in (a), the trace pointer T is displayed at the corresponding point of the X coordinate value “0”, and the XY coordinates of the trace pointer T are displayed at the bottom of the display 3 (step T12). In this operation example, a graph expression is displayed on the upper left of the display 3 at this time. At this time, when the user operates the “F6” key 26f, as shown in FIG. 17B, the display content on the display 3 is switched to only the graph.

  Next, when the user performs an operation of moving the trace pointer T rightward a plurality of times (step T13; Yes), the X coordinate value of the trace pointer T is increased rightward as shown in FIG. (Step T14), the trace pointer T is displayed at the corresponding point of the scale value “2.5” on the X axis, and the XY coordinates of the trace pointer T are displayed at the bottom of the display 3 (Step S14). T12). At this time, when the user operates the “F6” key 26f, the display content on the display 3 is switched to only the graph as shown in FIG.

As described above, according to the present embodiment, the trace pointer T is displayed on the graph of the XY coordinate system determined by the XY axes, as shown in steps T10 to T14 of FIG. 7, FIG. 11C, FIG. However, since the trace pointer T is moved on the graph according to the user operation and the coordinate value of the trace pointer T is displayed, the trace pointer T is displayed at an arbitrary point on the graph, and the trace pointer T Can be displayed.
Then, as shown in steps T3, T4 and T9 to T14 of FIG. 7, FIG. 11C, FIG. 17, etc., scales are displayed on the X axis at a predetermined scale interval (Xscl), and the trace pointer T is It moves on the graph for each dot in the X-axis direction according to the user's operation, and the value obtained by dividing the X-axis numerical value (Xmax-Xmin) by the scale interval (Xscl) is the dot in the X-axis direction. The numerical value width (Xmax−Xmin) of the X axis is set so that it becomes a fraction of an integer, and the X axis is displayed. Therefore, the interval between each scale in the X axis direction is expressed by an integer number of dots. As a result, the coordinate value of the trace pointer T can be surely matched with the scale value. Therefore, an accurate value on the Y axis can be obtained by matching the coordinate value of the trace pointer T with the scale value with respect to the X axis.

  Further, as shown in steps S9 to S10 in FIG. 6, step T9 in FIG. 7, FIG. 11, FIG. 16 to FIG. 17, etc., the image data 243 is added to indicate the display range of the Y axis to be associated with the image. Since data 246 is added, and this additional data 246 is set so that the reference line L of the image matches the X axis, the reference line L in the image is made to match the X axis, and the image is converted into the XY coordinates. It can be displayed as the background of the system.

  Further, as shown in steps S9 to S10 in FIG. 6, step T9 in FIG. 7, FIG. 11, FIG. 16 to FIG. 17, etc., the image data 243 is added to indicate the display range of the XY axes to be associated with the image. Data 246 is added, and this additional data 246 is set so that the reference point P of the image coincides with the origin, so that the reference point P in the image coincides with the origin and the image is represented in the XY coordinate system. It can be displayed as a background.

  In addition, it is needless to say that the detailed configuration and detailed operation of each component of the scientific calculator 1 in the above embodiment can be appropriately changed without departing from the gist of the present invention.

  For example, the graph display device according to the present invention has been described as the scientific calculator 1, but those to which the present invention is applicable are not limited to such products, but are mobile phones, personal computers, PDAs (Personal Digital Assistants), game machines It can be applied to all electronic devices. The function graph display program 130 according to the present invention may be stored in a memory card, CD, or the like that can be attached to and detached from the scientific calculator 1.

Further, although the function graph display process has been described as being performed by the personal computer 200, it may be performed by the scientific calculator 1 by executing the function graph display program 130.
Further, the scientific calculator 1 has been described as receiving the image file 245 from the personal computer 200 via the communication unit 16, but may be received via the recording medium reading unit 17.

  In the process of step T9, the image of the image data 243 is displayed on the background, and the coordinate system determined by the XY axes is displayed on the near side of the image. However, as long as the contents of both can be visually recognized, the order of overlapping is described. May be reversed.

  Moreover, although the vertical axis of the coordinate system has been described as the Y axis and the horizontal axis as the X axis, other coordinate axis names may be used. Furthermore, although the coordinate system has been described as an orthogonal coordinate system, other types of coordinate systems such as an oblique coordinate system and a polar coordinate system may be used.

  Further, although it has been described that the user inputs the graph expression via the input key group 2 in the process of step T8, it may be input via the touch panel 30.

1 Scientific calculator 2 Input key group 3 Display 11 CPU
12 RAM
13 Storage Unit 14 Key Input Unit 15 Display Unit 130 Function Graph Display Program

Claims (8)

Display means;
A display range storage unit for storing a display range composed of an upper limit value and a lower limit value in the horizontal axis direction and the vertical axis direction of the graph displayed on the display means;
Image storage means for storing a plurality of image data;
Image data designating means for designating any one of the plurality of image data;
Coordinate axis display control means for causing the display means to display the coordinate axes in the vertical axis direction and the horizontal axis direction according to the display range stored in the display range storage unit;
Display range resetting means for resetting the display range stored in the display range storage unit by a user operation;
A file storage means for adding the reset display range as additional data to the designated image data and storing it as a file;
With
The designated image data is image data having a horizontal reference line that coincides with the coordinate axis in the horizontal axis direction when a graph is drawn on the image according to the display range of the additional data ,
When the image of the image data is displayed superimposed on the coordinate axis corresponding to the display range of the additional data, the additional data is set so that the displayed coordinate axis in the horizontal axis direction matches the reference line in the left-right direction. An electronic device characterized in that a display range is set. Display means;
A display range storage unit for storing a display range composed of an upper limit value and a lower limit value in the horizontal axis direction and the vertical axis direction of the graph displayed on the display means;
Image storage means for storing a plurality of image data;
Image data designating means for designating any one of the plurality of image data;
Graph display control means for causing the display means to display the coordinate axes in the vertical axis direction and the horizontal axis direction according to the display range stored in the display range storage unit, and to display a graph in a coordinate system determined by the display range. When,
Display range resetting means for resetting the display range stored in the display range storage unit by a user operation;
A file storage means for adding the reset display range as additional data to the designated image data and storing it as a file;
With
The designated image data includes image data having a reference point that coincides with the origin corresponding to the coordinate axes in the vertical axis direction and the horizontal axis direction when a graph is drawn on the image according to the display range of the additional data. And
When the image of the image data is displayed superimposed on the coordinate axis corresponding to the display range of the additional data, the origin and the reference point corresponding to the displayed vertical axis and horizontal axis are displayed. An electronic device characterized in that a display range of additional data is set so as to match.   The display range resetting means moves the display range up and down by a user operation while displaying the coordinate axes in the vertical axis direction and the horizontal axis direction on the display means by the coordinate axis display control means, and stores the display range. The electronic apparatus according to claim 1, further comprising a vertical movement resetting unit that resets the display range stored in the unit.   The display range resetting means moves the display range left and right by a user operation while displaying the coordinate axes in the vertical axis direction and the horizontal axis direction on the display means by the coordinate axis display control means, and stores the display range. The electronic apparatus according to claim 1, further comprising a left-right movement resetting unit that resets the display range stored in the unit.   The display range resetting means stores the display range by expanding or reducing the display range by a user operation in a state in which the coordinate means in the vertical axis direction and the horizontal axis direction are displayed on the display means by the coordinate axis display control means. The electronic apparatus according to claim 1, further comprising an enlargement / reduction resetting unit that resets the display range stored in the unit. The coordinate axis display control means includes coordinate scale display control means for displaying scales at a constant scale interval for each coordinate axis when displaying the coordinate axes in the vertical axis direction and the horizontal axis direction on the display means,
The electronic device according to claim 1, wherein the file storage unit stores a scale interval for each coordinate axis as the additional data. A display unit, a display range storage unit that stores a display range including an upper limit value and a lower limit value in the horizontal axis direction and the vertical axis direction of the graph displayed on the display unit, and an image storage unit that stores a plurality of image data. In the computer of electronic equipment
An image data designating function for designating any one of the plurality of image data;
A coordinate axis display control function for causing the display means to display coordinate axes in the vertical axis direction and the horizontal axis direction in accordance with the display range stored in the display range storage unit;
A display range resetting function for resetting the display range stored in the display range storage unit by a user operation;
A file saving function for adding the reset display range as additional data to the designated image data and saving it as a file;
Realized,
The designated image data is image data having a horizontal reference line that coincides with the coordinate axis in the horizontal axis direction when a graph is drawn on the image according to the display range of the additional data ,
When the image of the image data is displayed superimposed on the coordinate axis corresponding to the display range of the additional data, the additional data is set so that the displayed coordinate axis in the horizontal axis direction matches the reference line in the left-right direction. A program characterized in that the display range is set. A display unit, a display range storage unit that stores a display range including an upper limit value and a lower limit value in the horizontal axis direction and the vertical axis direction of the graph displayed on the display unit, and an image storage unit that stores a plurality of image data. In the computer of electronic equipment
An image data designating function for designating any one of the plurality of image data;
A coordinate axis display control function for causing the display means to display coordinate axes in the vertical axis direction and the horizontal axis direction in accordance with the display range stored in the display range storage unit;
A display range resetting function for resetting the display range stored in the display range storage unit by a user operation;
A file saving function for adding the reset display range as additional data to the designated image data and saving it as a file;
Realized,
The designated image data includes image data having a reference point that coincides with the origin corresponding to the coordinate axes in the vertical axis direction and the horizontal axis direction when a graph is drawn on the image according to the display range of the additional data. And
When the image of the image data is displayed superimposed on the coordinate axis corresponding to the display range of the additional data, the origin and the reference point corresponding to the displayed vertical axis and horizontal axis are displayed. A program characterized in that the display range of the additional data is set so as to match.