JPH10161980A - Device and method for displaying graph, and medium recording graph display program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform desired graph display while selectively setting whether plural existent graph data are to be overlapped and displayed or only one piece of graph data are to be displayed at a graph display device for inputting and displaying the graph data. SOLUTION: A graph setting screen is displayed by operating a 'set' key 12c at a key input part, selective graph display 'ON' is selected, new graph type data 'Graph=3X' are inputted by operating a 'Graph' key 12d in the state of setting '1' to a graph display flag register in a RAM, and the plotting of graph is instructed by an 'execute' key 12h. Then, the display of already inputted graph type data 'Graph=X' and 'Graph=X<2> ' is erased and only the latest input graph data are selectively displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a graph display device for displaying stored graph data, a graph display method, and a medium storing a graph display program.

[0002]

2. Description of the Related Art In a computer having a function calculation function, when a graph mode is set and an arbitrary function formula or statistical data is input and a drawing of a graph is instructed, the input function formula or statistical data is input. 2. Description of the Related Art An electronic computer called a graph scientific calculator that draws and displays a corresponding graph has been put to practical use.

Conventionally, in such a graph scientific calculator, when a new function expression is input and a drawing of a graph is instructed, another function expression or a graph corresponding to the function expression is already stored as graph data in advance. In this case, a graph corresponding to the newly input function expression is displayed in an overlapping manner along with the other graph.

[0004]

However, in the computer having the conventional graph display function, even if it is desired to display only the graph corresponding to the newly input function expression, it is necessary to display the already input function expression. If there is a, the graph corresponding to the input function expression will also be displayed overlapping, so we want to analyze only the graph corresponding to the latest function expression without deleting the already input function expression In some cases, there is a problem that the graph display screen is very difficult to see.

[0005] The same applies to the case where only one arbitrary graph among a plurality of already input graph data is desired to be analyzed. Since the plurality of input graphs are displayed in a superimposed manner, the graph display screen is extremely difficult. There is a problem that is difficult to see.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is possible to selectively set a plurality of graphs to be displayed in an overlapping manner or to display only one graph by selectively setting a desired graph. It is an object to provide a display device capable of performing display, a graph display method, and a medium recording a graph display program.

[0007]

That is, a graph display device according to a first aspect of the present invention is a graph storage device for storing a plurality of graph data, and a display setting device for setting a selective display / non-selective display of a graph. Display instructing means for instructing the display of a graph, and, when the display of the graph is instructed by the display instructing means, when the selection setting of the graph is set by the display setting means, the graph storing means Displays only the graph data selected in advance among the plurality of graph data stored in the plurality of graph data. If the display setting unit does not set the selection display of the graph, the plurality of graph data stored in the graph storage unit is displayed. And display control means for displaying the graph data together.

That is, in the graph display device according to the first aspect of the present invention, when the display of the graph is set by selecting the display / non-selection of the graph and the display of the graph is instructed, the display of the graph is instructed when the display of the graph is instructed. When the selection display is set, only the previously selected graph data among the plurality of graph data stored in the graph storage means is displayed, and when the selection display of the graph is not set,
Since a plurality of graph data stored in the graph storage means are displayed together, only the graph data selected and set in advance can be selectively displayed as needed.

A graph display device according to a second aspect of the present invention is the graph display device according to the first aspect, further comprising an arbitrary one of a plurality of graph data stored in the graph storage means. A graph designation unit for designating the graph data, wherein the display control unit is configured to, when a display of a graph is instructed by the display instruction unit, select display of the graph by the display setting unit, Displaying only the pre-selected graph data and the graph data specified by the graph specifying means out of the plurality of graph data stored in the graph storage means, and selecting and displaying the graph by the display setting means. If not, it is a display control means for displaying a plurality of graph data stored in the graph storage means together. That.

That is, in the graph display device according to the second aspect of the present invention, there is provided a graph designation means for designating arbitrary graph data among a plurality of graph data stored in the graph storage means, and a display instruction means. When the display of the graph is instructed by the display setting unit, if the selection display of the graph is set by the display setting unit, the graph data previously selected from the plurality of graph data stored in the graph storage unit and the graph data When only the graph data specified by the graph specifying unit is displayed, and when the display setting unit does not set the selective display of the graph, a plurality of graph data stored in the graph storage unit are displayed together. Therefore, only the previously selected and arbitrarily specified graph data can be selectively displayed as needed. .

A graph display device according to a third aspect of the present invention is the graph display device according to the first or second aspect, further comprising a plurality of graph data stored in the graph storage means. Are individually designated, and switching control means for switching display / non-display of the graph data corresponding to each operation of the graph designation key is provided.

That is, in the graph display device according to the third aspect of the present invention, each time a graph designation key for individually designating a plurality of graph data stored in the graph storage means is operated, the corresponding graph data is displayed. Since the display / non-display is switched, only the necessary graph data can be repeatedly displayed or deleted.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an electronic circuit of an electronic computer with a function calculating function according to an embodiment of the graph display device of the present invention.

This computer has a control unit (CPU) 11 composed of a computer or the like. Control unit (CP
U) 11 causes the recording medium reading unit 17 to read a system program stored in the ROM 13 or a computer control program stored in the external recording medium 18 in advance in response to a key operation signal from the key input unit 12. And controls the operation of each part of the circuit using the RAM 14 as a work memory.

The control unit (CPU) 11 includes the key input unit 12, the ROM 13, the recording medium reading unit 17,
The AM 14 is connected, and the liquid crystal display unit 16 is connected via the display drive circuit 15.

The key input unit 12 is provided with data input keys 12a comprising various numerical / symbol key groups such as numerical keys, operator keys, function keys, etc., as well as ordinary calculation processing corresponding to any input formula. Menu screen of various operation modes such as calculation mode for performing graph display processing, matrix mode for performing calculation processing corresponding to a determinant, program mode for performing calculation processing corresponding to an arbitrary input program, and statistical mode for performing statistical calculation processing A "menu" key 12b operated when displaying "", a "setting" key 12c operated when displaying a graph setting screen for setting the presence or absence of selective graph display and the graph coordinate range in the calculation mode, "G" operated when displaying a graph expression input screen for inputting a new graph function expression
key 12d, color designation keys "blue", "green", "red", "yellow" 12e operated when designating a graph display color with respect to the inputted graph formula, An "expression / graph" key 12f operated when switching between a display state and a graph display state, and cursor keys "↑", "↓", and "操作" operated when moving a cursor and selecting data on a display screen. ←, “→” 12g,
An "execute" key 12h operated to instruct setting of selected data or execution of a function, a "CLS" key 12i operated to clear and initialize all data in an operation mode being executed, and the like. Is provided.

The ROM 13 stores in advance system program data that governs the overall processing of the electronic circuit of the computer, and governs the processing of various operation modes such as the calculation mode shown in FIGS. 3 and 4. Control program data, which is subprogram data, is also stored in advance.

The RAM 14 has a display register 14a in which display data to be displayed on the liquid crystal display 16 in the various operation modes is developed and stored as dot matrix pattern data, and "Graph" in the calculation mode.
The "h" key 12d is operated by a graph-type data register 14b in which the graph-type data entered is stored together with the color designation data for display, and graph data corresponding to each graph-type data stored in the graph-type data register 14b The graph register 14c, which is individually drawn and stored, has a selective graph display on the graph setting screen associated with the operation of the "setting" key 12c. When "ON" is set, the flag "1" is set.
No selective graph display Temporarily stores the graph display flag register T which is set to the flag "0" when "OFF", and the data input / output by the control unit (CPU) 11 accompanying the control processing of various operation modes. And a data register such as a work register.

The color designation data stored in the graph data register 14b in the RAM 14 in association with each graph data is the color designation keys "blue" and "green".
It is set according to the operation of “red” and “yellow” 12e. The normal graph display color without color designation is black.

Next, the operation of the computer having the above configuration will be described. FIG. 2 is a flowchart showing the overall processing of the computer. When the "menu" key 12b of the key input unit 12 is operated, a menu selection screen for selecting and setting an operation mode such as a calculation mode, a matrix mode, and a program mode is displayed on the liquid crystal display unit 16 (steps S1 → S2). .

In the display state of the menu selection screen, when the cursor key 12g is selectively operated to select an arbitrary operation mode and the "execute" key 12h is operated, the selected operation mode is set, and the setting operation is performed. The control processing program corresponding to the mode is started and the display state of the initial display screen is set (steps S3 → S4, S5 → S6, S
7).

When the calculation mode is selected and set by the menu selection setting process (steps S1 to S7), an initial display screen is displayed on the liquid crystal display unit 16 for inputting a calculation formula, and the calculation mode process (FIG. 3, see FIG. 4) is started (step S8 → SA).

When the matrix mode is selected and set by the menu selection setting process (steps S1 to S7), an initial display screen for inputting a determinant is displayed on the liquid crystal display unit 16, and the matrix mode processing is performed. Is activated (steps S9 → S10).

When the program mode is selected and set by the menu selection setting process (steps S1 to S7), an initial display screen for inputting program data is displayed on the liquid crystal display unit 16, and the program mode process is performed. Is started (steps S11 → S12).

Further, when another operation mode is selected and set by the menu selection setting process (steps S1 to S7), the initial display screen is displayed on the liquid crystal display unit 16
Is displayed, the corresponding operation mode processing is started (step S11 → other processing).

FIG. 3 is a flowchart showing a calculation mode process (1) of the computer. FIG. 4 is a flowchart showing a calculation mode process (2) of the computer.

FIG. 5 is a diagram showing an initial graph input display state in the selection graph display "OFF" accompanying the calculation mode processing of the computer. 5 by the menu selection setting process (steps S1 to S7) in FIG.
When the "calculation" mode is selected by operating the cursor key 12g and the "execute" key 12h is operated in the display state of the menu selection screen as shown in FIG. ), An initial display screen for inputting a calculation formula is displayed (step S8).
→ SA).

Here, for example, when an arbitrary calculation formula is input by selectively operating the data input key 12a of the key input unit 12, the input calculation formula is stored in the RAM 14 and displayed on the liquid crystal display unit 16. (Step A15 → A
16).

Then, when the execution of the input calculation formula is instructed by operating the "Execute" key 12h, it is determined that the input is not a graph formula, and the calculation process corresponding to the input calculation formula is executed. The answer is displayed on the liquid crystal display section 16 (steps A19 → A20 → A26, A27).

On the other hand, as shown in FIG.
As shown in FIG. 5C, when the "SET" key 12c is operated, a graph setting screen for setting the presence / absence of selective graph display and the graph coordinate range is displayed on the liquid crystal display section 16 (step A1 →). A2).

In the display state of the graph setting screen,
If you want to selectively display only the graphs of the latest input graph type and the color specified graph type, select “Selected graph display” “ON” and superimpose all input graph types. If you want to display, select "Selected graph display""OFF". At the same time, the X coordinate register and the Y coordinate range to be drawn as a graph are input numerically (step A2).

Here, for example, in the display state of the graph setting screen, when "selection graph display" and "OFF" are selected by the cursor and an arbitrary XY coordinate range is input and the "execute" key 12h is operated, the RAM 14 The flag “0” is set in the graph display flag register T (steps A3 → A4 → A6).

Then, as shown in FIG.
When the "aph" key 12d is operated, the process proceeds to a graph type input setting process, and data prompting the input of the graph type is displayed as "1G".
The data is displayed on the liquid crystal display unit 16 as “raph =” (steps A11 → A12 → A13, A14).

When the data input key 12a is operated in accordance with the input message of the first graph expression and a desired first graph expression such as "1 Graph = X" is inputted as shown in FIG. The graph expression "Graph =
"X" is stored at the first address in the graph data register 14b in the RAM 14 (step A15 → A).
16).

As shown in FIG. 5 (F), when the "execute" key 12h is operated, it is determined that the input / display state of the graph type data is being displayed. The graph data already stored and already drawn and stored in the graph register 14c is read out and displayed on the liquid crystal display unit 16 (steps A19 → A20 → A21).

In this case, the first graph expression "Graph
No graph data is displayed since there is no graph already displayed before the input of "= X". And R
It is determined whether or not the flag of the graph display flag register T in the AM 14 is "1", that is, whether or not the selected graph is displayed (step A22).

In this case, it is determined that the graph display flag register T in the RAM 14 is set to the flag "0" (no selected graph is displayed), and the latest graph expression "T" stored in the graph expression data register 14b is set. 1 G
The graph corresponding to "raph = X" is drawn and stored in the corresponding graph register 14c in accordance with the set XY coordinate range, and when the color designation data is associated, the liquid crystal display unit uses the corresponding display color. 16 (Step A22 → A24 → A25).

In this case, the first graph expression “1 Gra
Since there is no color designation data for "ph = X", the corresponding graph is displayed in black. FIG. 6 shows a selection graph display “OFF” accompanying the calculation mode processing of the computer →
It is a figure which shows the several graph input display state in "ON".

As described with reference to FIG.
A graph display flag register in which only the first graph expression "1 Graph = X" is stored in the graph expression data register 14b in M14, and the corresponding graph data is drawn in the graph data register 14c and displayed on the liquid crystal display unit 16. When the “expression / graph” key 12 f is operated as shown in FIG. 6 (A) in the setting state of all the graph displays other than the selected graph display in which T is “0”, the display screen of the liquid crystal display section 16 displays the graph data. Is switched from the display state to the display state of the graph type data, and the graph type data register 14b
The first graph expression “1 Graph = X” stored in
Is displayed (step A7 → A8).

Here, the "Graph" key 12d is operated to display the input data "2Graph =" of the second graph expression (steps A11 → A12 → A13, A14).
At the same time, the user operates the data input key 12a to select "2G
rap = X ² "and input / display the graph data (step A15 → A16), and as shown in FIG.
When the "execute" key 12h is operated, it is determined that the display mode is the input display mode of the graph type data. First, the graph type data register 14b in the RAM 14 is already stored in the graph type register 14c, The graph of the one-graph expression “1 Graph = X” is read out and displayed on the liquid crystal display unit 16 (steps A19 → A20 →).
A21).

Then, it is determined that the graph display flag register T in the RAM 14 is set to the flag "0" (no selected graph display: all graph display), and the latest graph stored in the graph data register 14b is determined. A graph corresponding to the expression “2 Graph = X ² ” is drawn and stored in the corresponding graph register 14c, and when color designation data is associated, the graph is superimposed with the first graph in the corresponding display color. (Step A22 → A24 → A25).

In this case, the second graph expression “2 Gra
Since there is no color designation data in “ph = X ² ”, both the first and second graph data are displayed in black. In this way, the graph data corresponding to the first graph expression “1 Graph = X” and the second graph expression “2 Graph = X ² ” are displayed in an overlapping manner according to the setting of no selected graph display (T = “0”). In the state shown in FIG. 6 (C),
By operating the "SET" key 12c, a graph setting screen is displayed (step A1 → A2), the XY coordinate range is set, and the selected graph display "ON" is cursor-selected.
When the "execute" key 12h is operated, the flag "1" is set in the graph display flag register T in the RAM 14 (steps A3 → A4 → A5).

Then, as shown in FIG.
ap ”key 12d to display a new graph data input display screen (step A11 → A12 → A13,
A14), in a state where the third graph expression “3 Graph = 3X” is input and displayed (step A15 → A16), FIG.
As shown in (E), when the "execute" key 12h is operated, it is determined that the input mode is the display mode of the graph data, and the data is already stored in the graph data register 14b in the RAM 14 and is already stored in the graph register 14c. The first and second graph expressions “1 Graph = X” stored and drawn
The respective graphs of “2 Graph = X ² ” are read out and once displayed on the liquid crystal display unit 16 (step A19 → A2).
0 → A21).

Then, it is determined that the graph display flag register T in the RAM 14 is set to the flag "1" (selection graph display is present), and the first and second graph expressions once displayed on the liquid crystal display unit 16 are set. "1 Graph = X"
Of the two graph data corresponding to “2 Graph = X ² ”, the graph data to which the color designation data is not associated, in this case, the first and second graph data are erased, and the graph data register 14b is deleted. Is drawn and stored in the corresponding graph register 14c, and when the color designation data is associated with the latest graph expression “3 Graph = 3X” stored in the corresponding display color, Only the third graph is displayed alone (steps A22 → A23, A24 → A25).

FIG. 7 is a diagram showing a plurality of graph input display states corresponding to the color designation operation and the numerical value designation operation in the selection graph display "ON" accompanying the calculation mode processing of the computer.

As described with reference to FIG.
The first, second, and third graph expressions “1 Graph = X” and “2 Gram” are stored in the graph expression data register 14b in M14.
ph = X ^{2, and} “3 Graph = 3X” are stored.
In the setting state of the selected graph display in which the graph display flag register T is “1”, as shown in FIG.
By operating the "Graph" key 12f, the display screen of the liquid crystal display unit 16 is switched from the display state of the graph to the display state of the graph data, and the first, second, and third stored in the graph data register 14b. Each graph formula "1 Gr
aph = X, “2 Graph = X ² ”, “3 Graph
h = 3X "is displayed in an array (step A7 → A8).

In the display state of all the graph type data, the cursor key 12g is operated to select, for example, the first graph type "1 Graph = X" and the color designation key "red".
When 12e is operated, the selected first graph expression “1”
The color designation data "red" corresponding to the color designation key "red" 12e is set and stored in association with the storage address in the graph type data register 14b of "Graph = X" (steps A17 to A18).

Then, as shown in FIG.
ap ”key 12d to display a new graph data input display screen (step A11 → A12 → A13,
A14), and the fourth graph expression “4 Graph = 1 /
When the "Execute" key 12h is operated as shown in FIG. 7C in a state where "2X" is input and displayed (steps A15 to A16), it is determined that the input mode is the graph type data input display mode. Graph data register 1
4b and already drawn and stored in the graph data register 14c.
aph = X, “2 Graph = X ² ”, “3 Graph
The graph data of "h = 3X" is read out, and among them, the first graph data is once displayed on the liquid crystal display unit 16 as red (step A19 → A20 → A21).

Then, it is determined that the graph display flag register T in the RAM 14 is set to the flag "1" (selection graph display is present), and the first, second, and second data displayed once on the liquid crystal display unit 16 are displayed. 3 Graph expression "1 Graph
= X "," ² Graph = X 2 "," 3 Graph = 3
X, the graph data to which no color designation data is associated, in this case, the second and third graphs are deleted, and the graph data register 1
4b stored in the latest graph expression “4 Graph = 1
/ 2X ”corresponds to the graph register 1
4c is drawn and stored, and when the color designation data is associated therewith, it is displayed in the corresponding display color together with the first graph selected by associating the color designation data “red” (step A22 → A23, A24 → A2
5).

FIG. 7D shows a state in which the color-designated graph data and the latest input graph data are selectively displayed.
By operating the color designation key "red" 12e as shown in
It is determined whether there is graph data corresponding to the designated color (step A11 → A33 → A34).

Here, the graph data specified in red is R
If it is determined that the first graph is present in the AM 14 and that it is being displayed, the designated first graph displayed in red is erased from the liquid crystal display unit 16 and the fourth graph expression “4 Graph = 1” is displayed. / 2X ”(step A34 → A30 → A31).

Further, as shown in FIG. 7 (E), when the numerical value "2" of the data input key is operated, it is determined whether or not there is graph type data of a number corresponding to the input numerical value "2" (step S1). A11 → A28 → A29).

Here, it is determined that the graph-type data "2 Graph = X ² " specified by the numerical value "2" exists in the graph-type data register 14b in the RAM 14, and that it is not displayed. Is displayed together with the latest fourth graph already selected and displayed (step A30 → A32).

Further, as shown in FIG. 7F, when the color designation key "red" 12e is operated again, it is determined that the graph data designated as red exists in the RAM 14 and that the graph data is not being displayed. , Red designated first
The graph is read from the RAM 14 and redisplayed together with the latest fourth graph that has already been selected and displayed (A11 →
A33 → A34 → A30 → A32).

Further, when the numerical value “2” of the data input key is operated again, the graph-type data “2” for which the numerical value is specified “2” is displayed.
It is determined that “Graph = X ² ” exists in the graph-type data register 14b in the RAM 14, and it is determined that the second graph having the number corresponding to the input numerical value “2” is being displayed, and the designated numerical value “2” is displayed. Is erased from the liquid crystal display unit 16 and the fourth graph expression “4G
The display state of only the graph corresponding to "raph = 1 / 2X" and the first graph redisplayed with the red color designation are set (step A11 → A28 → A29 → A30 → A31).

When the "CLS" key 12i is operated, all the stored data associated with the calculation mode processing up to that time are erased, and the display returns to the initial display state, ie, the standby state for inputting the calculation formula (step). A9 → A10).

Therefore, according to the computer having the above configuration, the "setting" key 12c of the key input unit 12 is operated to display the graph setting screen, select the selected graph display "ON", and display the graph in the RAM 14. With “1” set in the flag register T, the “Graph” key 12
By the operation of d, new graph type data "Graph = 3
When the user inputs "X" and instructs to draw a graph with the "Execute" key 12h, the already input graph expression data "G
The display of the graphs of graph = X and Graph = X ² is deleted, and only the graph of the latest input graph data is selectively displayed.

In the display state of the graph type data, the color designation key 12e corresponding to any graph type data is displayed.
Is operated to set the graph display color, the graph designated with this color is also selected and displayed together with the latest input graph.

Further, in response to the operation of the color designation key 12e, the display / non-display of the graph whose color is designated is operated, and in accordance with the operation of designating the number of the graph using the numeric keys,
The display / non-display of the designated number graph can be operated.

Therefore, if the column of the selected graph display on the graph setting screen is set to “ON”, when only the graph corresponding to the newly input graph formula is to be displayed and viewed, the input has already been performed. Even when a graph expression exists, only the graph corresponding to the latest graph expression can be selectively displayed without deleting the already input graph expression.

Even when it is desired to analyze only one arbitrary graph data among a plurality of already input graph data, only a necessary graph can be selectively displayed by a color designation operation or a numerical designation operation. Become.

The methods described in the above embodiment, that is, the entire processing of the computer shown in the flow chart of FIG. 2 and the calculation mode processing shown in the flow charts of FIGS. 3 and 4 can be executed by a computer. Possible programs include a memory card (ROM card, RAM card, etc.), a magnetic disk (floppy disk, hard disk, etc.), an optical disk (CD-RO
M, DVD, etc.), and can be stored in an external recording medium 18 such as a semiconductor memory and distributed. Then, the computer reads the program recorded on the external recording medium 18 by the recording medium reading unit 17, and controls the operation by the read program, thereby realizing each function described in the above embodiment. A similar process can be executed by the method described above.

[0063]

As described above, according to the graph display device according to the first aspect of the present invention, when the selection display / non-selection display of the graph is set and the display of the graph is instructed, the graph display is instructed. At this time, if the selection display of the graph is set, only the graph data selected in advance among the plurality of graph data stored in the graph storage means is displayed, and the selection display of the graph is set. If not, a plurality of graph data stored in the graph storage means are displayed together, so that only a graph selected and set in advance can be selectively displayed as needed.

According to the graph display device of the second aspect of the present invention, there is provided a graph designating means for designating arbitrary graph data among a plurality of graph data stored in the graph storage means. When the display of the graph is selected by the display setting unit when the display of the graph is instructed by the instruction unit, the graph data selected in advance from among the plurality of graph data stored in the graph storage unit And when only the graph of the graph data specified by the graph specifying unit is displayed, and when the selection display of the graph is not set by the display setting unit, the plurality of graph data stored in the graph storage unit is displayed. Since both are displayed, it is possible to selectively display only the graph data pre-selected and set as required and the graph data specified arbitrarily. So as to.

According to the graph display device of the third aspect of the present invention, each time a plurality of graph data stored in the graph storage means is individually operated, a corresponding graph is designated. Since the display / non-display of the data can be switched, only the necessary graph can be repeatedly displayed or deleted.

Accordingly, it is possible to selectively set whether to display a plurality of graphs in a superimposed manner or to display only one graph, and to perform a desired graph display.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic circuit of an electronic computer with a function calculating function according to an embodiment of a graph display device of the present invention.

FIG. 2 is a flowchart showing the overall processing of the computer.

FIG. 3 is a flowchart showing a calculation mode process (1) of the computer.

FIG. 4 is a flowchart showing a calculation mode process (2) of the computer.

FIG. 5 is a diagram showing an initial graph input display state in a selection graph display “OFF” accompanying the calculation mode processing of the computer.

FIG. 6 is a diagram showing a plurality of graph input display states when a selected graph is displayed from “OFF” to “ON” in accordance with a calculation mode process of the computer.

FIG. 7 is a view showing a plurality of graph input display states corresponding to a color designation operation and a numerical value designation operation in a selection graph display “ON” accompanying the calculation mode processing of the electronic computer.

[Explanation of symbols]

 11: control unit (CPU), 12: key input unit, 12a: data input key, 12b: "menu" key, 12c: "set" key, 12d: "Graph" key, 12e: color designation key "blue", Green, red, yellow, 12f ... "expression / graph" key, 12h ... "execute" key 13 ... ROM, 14 ... RAM, 14b ... graph expression data register, 14c ... graph register, T ... graph display flag register , 16 ... liquid crystal display section.

Claims (6)

[Claims] 1. Graph storage means for storing a plurality of graph data; display setting means for setting selection display / non-selection display of a graph; display instruction means for instructing display of a graph; In the case where the display setting is instructed and the display setting means has set the selective display of the graph, only the preselected graph data among the plurality of graph data stored in the graph storage means is displayed. And display control means for displaying together a plurality of graph data stored in the graph storage means when the selection display of the graph is not set by the display setting means. Graph display device. 2. The apparatus according to claim 1, further comprising: a graph designation unit for designating arbitrary graph data among a plurality of graph data stored in the graph storage unit, wherein the display control unit displays the graph by the display instruction unit. Is designated, and if the display setting means has set the selection display of the graph, the graph data selected in advance from among the plurality of graph data stored in the graph storage means and the graph designation Display control means for displaying only the graph data specified by the means, and when the selection display of the graph is not set by the display setting means, displaying a plurality of graph data stored in the graph storage means together The graph display device according to claim 1, wherein 3. A graph designation key for individually designating each of a plurality of graph data stored in the graph storage means, and display / non-display of graph data corresponding to each operation of the graph designation key. The graph display device according to claim 1, further comprising a switching control unit. 4. Graph data storage means for storing a plurality of input graph data, graph display means for displaying a graph of the graph data stored in the graph data storage means, and graph data storage means for storing the graph data stored in the graph data storage means. Display instructing means for instructing display of only a graph of specific graph data from the graph data; and instructing the display instructing means to cause the graph displaying means to display only the graph of the last graph data stored in the graph data storing means. A graph display device comprising: display control means. 5. A step of storing a plurality of graph data, a step of setting selection display / non-selection display of a graph, and a case where the display of the graph is set when the display of the graph is instructed. Displays only the previously selected graph data among the plurality of stored graph data, and when the selection display of the graph is not set, the stored plurality of graph data are displayed together. Displaying a graph. 6. A computer, comprising: a graph storage means for storing a plurality of graph data; a display setting means for setting selection display / non-selection display of a graph; When the selection display is set, only the graph data selected in advance among the plurality of graph data stored in the graph storage means is displayed, and the selection display of the graph is set by the display setting means. If not, a medium storing a graph display program for functioning as display control means for displaying a plurality of graph data stored in the graph storage means together.