JP3503758B2 - Graph display control device and graph display control method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graph display control device and a graph display control method used for displaying a function formula and the like in the form of a graph.

[0002]

2. Description of the Related Art For example, a graph display device has been put into practical use, which inputs a functional expression such as Y = f (x) and displays it as a graph on the X and Y coordinates of a specified range. In such a graph display device, a device having a function of graphing a plurality of expressions on the same X and Y coordinates and displaying them simultaneously is also considered.

[0003]

However, in the conventional graph display device, a plurality of formulas are once changed to the same X, Y.
If you make a graph on the coordinates and display them simultaneously, to extract and display only one formula graph after that, again,
You must perform the graph display operation only for that expression.

Therefore, a plurality of equations can be graphed on their respective coordinates and displayed in contrast, or can be selectively combined and displayed so that individual graphs can be freely analyzed in relation to other graphs. I have a difficult problem.

The present invention has been made in view of the above problems,
An object of the present invention is to provide a graph display control device and a graph display control method capable of flexibly handling individual graphs by appropriately combining or dividing them when displaying a plurality of expressions in graph form.

[0006]

That is, the first graph display control apparatus according to the present invention is a list display control means for performing control to display a large number of functional expressions in a list, and a list display control means for controlling the list display. and expressions specifying means for specifying multiple function expression of the graph to be synthesized from the displayed the plurality of function formula, the first operating means is operated when synthesizing the graph, the first operating means Depending on the operation, the expression finger
The double graph of a plurality of function formula specified by the constant unit
Preset in one of the number graphs
A synthesis display control means for simultaneously displaying synthesized on the same coordinates in the coordinate range, the second operating means is operated when displaying individual graphs of multiple function formula, the second operating means Depending on the operation, the graphs that are simultaneously displayed under the control of the composite display control means are set in advance for each of the graphs.
And an individual display control means for individually displaying on different coordinates in the coordinate range being set .

A second graph display control device according to the present invention is the same as the first graph display control device .
This is the third operation means that is used when copying a rough.
According to the operation of the third operation means of the
The graphs displayed on different coordinates by the step control.
Copy one graph on top of the other
And a copy display control means for displaying the images in an overlapping manner .

[0008]

That is, in the first graph display control device,
From many function formula listed under the control of the list display control means, a function formula of the graph to be synthesized by expression specifying means is specified more, the first operation means which is operated in the synthesis of the graph When operated, the composite display control means composites the graphs of the plurality of functional expressions in accordance with the operation, and presets in one of the plurality of graphs.
Simultaneous display on the same coordinates within the specified coordinate range . Then, when the second operation means operated when individually displaying the graphs of the plurality of simultaneously displayed function formulas is operated, the simultaneous display is performed by the individual display control means in response to the operation. Each graph is preset for each graph
It is displayed on each separate coordinate in the specified coordinate range .

Further, in the second graph display control device, a third operation means is operated when copying the graph.
When is operated, the copy display control
By the step, each by the control of the individual display control means
One of the graphs displayed on different coordinates
Is copied on the other graph and displayed in an overlapping manner.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing a graph display device. The device body 10 of this graph display device has a size that allows the user to hold it with one hand, for example.

A key input unit 11 and a graphic display unit 12 including a dot matrix type liquid crystal screen are provided on the front surface of the apparatus main body 10. The key input unit 11 includes an "ON" key 13 for turning the power on and off,
Numerical / symbol key 14 for inputting a functional expression to be displayed as a graph, and for inputting the coordinate range (Xmin, Xmax) (Ymin, Ymax) of the X-axis and Y-axis in the graphic display section 12, "Graph" key 15 to display the graph corresponding to the expression,
A “list” key 16 for displaying all inputted expressions in a list, a plurality of arbitrarily designated expressions among the listed expressions are displayed as a graph on the same coordinate, and are displayed separately, or separately. A "composite" key 17 for compositely displaying a graph that is divided and displayed on the coordinates of other graphs on the coordinates of other graphs; You can split it on top,
Alternatively, a “divide” key 18 for dividing and displaying a plurality of graphs that are combined and displayed on the same coordinates, and a certain graph that is divided and displayed on the different coordinates is copied and displayed on another graph. A "copy" key 19 for executing the functions, and an "EXE" key 20 for performing the functions such as the "composite", "divide", "copy" and the like are provided.

The graphic display unit 12 has a liquid crystal display screen of, for example, 64 dots in the vertical direction and 128 dots in the horizontal direction, and the graph corresponding to the functional expression or the like input by the numerical / symbol keys 14 is the X axis designated by the user. And according to the coordinate range of the Y axis.

In the graphic display unit 12, when two expressions among the plurality of expressions displayed in the list are specified and the divided display is performed, the display area is divided into left and right parts, and three or four expressions are specified. In the divided display, the display area is divided into four vertically and horizontally.

FIG. 2 is a block diagram showing the configuration of an electronic circuit of the graph display device. A CPU (Central Processing Unit) 21 is provided in the electronic circuit of the graph display device, and the CPU 21 controls the operation of each part of the circuit.

The CPU 21 is provided with the key input unit 11
And the graphic display unit 12 via the display buffer 22.
Besides, the ROM 23 and the RAM 24 are connected. R
In the OM 23, a basic system program for operating this graph display device is stored in advance, and a graph display processing program for displaying a graph corresponding to a keyed function expression or the like, a plurality of expressions having the same coordinates. A composition processing program for composing and displaying a graph on the above,
A division processing program for individually displaying a plurality of formulas on individual coordinates by graphing, a copy processing program for copying and displaying one graph on the other graph, and the like are stored in advance.

Then, the control operation by the CPU 21 is executed according to each program stored in the ROM 23. In the RAM 24, in addition to a key input register, various flag registers, etc., expression registers 25a, 25b, ...
a, 25b, ... Corresponding to the individual input expressions stored in the X-axis and Y-axis coordinate ranges (Xmin, Xma).
x) (Ymin, Ymax) are stored and set with range registers 26a, 26b ,.

Next, the operation of the graph display device having the above structure will be described. FIG. 3 is a flowchart showing a formula input graphing process by the graph display device.

That is, when the function expression or the like to be displayed as a graph is input by the numerical / symbol keys 14 in the key input unit 11 and the coordinate range of the X-axis and the Y-axis is input in order to display the input expression as a graph. , The input formula is stored in the formula registers 25a, 25b, ... Of the RAM 24, and the coordinate range is the range register 26 corresponding to each formula.
are stored in a, 26b, ... (Steps S1, S2).

Here, when the "graph" key 15 is operated to execute the graph display processing, for example, the X stored in the range register 26a corresponding to the first formula stored in the formula register 25a. And according to the Y coordinate range, X
The X coordinate corresponding to each display pixel in the axial direction is substituted into the first equation, and the Y coordinate thereof is sequentially calculated, and the coordinate point (X,
It is calculated which pixel in the X and Y directions Y) corresponds to on the screen, and by turning on that point, a graph is displayed on the graphic display unit 12 as shown in FIG. 1 (step S3). → S4).

FIG. 4 is a flow chart showing a process of compositing / dividing graphs of a plurality of expressions by the graph display device.
FIG. 5 is a flowchart showing the division / synthesis / copy processing in the graph display state by the graph display device.

FIG. 6 is a diagram showing a display state of the graphic display unit 12 associated with the graphing display processing of the graph display device. FIG. 6A is a diagram showing a list display state of the input formula, (B) is a diagram showing a multi-method graphing combined display state, (C) is a figure showing a plural-method graphing divided display state, and (D) is a multi-method graphing divided display state. It is a figure which shows a designated graph synthetic display state.

That is, first, for example, five functional expressions and their corresponding coordinate ranges are input and stored in the plurality of expression registers 25a, 25b, ... And range registers 26a, 26b ,. In this state, the “list” key 16 in the key input unit 11 is operated.

Then, the combination / division graphing process of a plurality of expressions in FIG. 4 is started, and all the five function expressions (including inequalities etc.) stored in the expression registers 25a, 25b, ... The data is read out and numbered and displayed as shown in FIG. 6 (A) (step A1).

Here, the second expression "Y≥x" is used as a functional expression to be graphed by operating a cursor key or the like (not shown).
² ”, the third formula“ Y <x + 2 ”, and the fifth formula“ Y = −x ² ”, and the display form is operated by operating the“ composite ”key 17 to combine and display the specified plural formulas. Is designated (steps A2 and A3).

Then, the coordinate range stored in the range register 26a corresponding to the first designated second expression is read out, and the X, Y coordinate range in the graphic display section 12 is set (step A4).

Then, according to the coordinate range corresponding to the second equation, the X-axis coordinate value for each display dot is the second equation,
Substituting into each of the third and fifth equations, the corresponding Y coordinates are sequentially calculated and graphed (step A5).

As a result, as shown in FIG. 6B, the graphs corresponding to the second equation, the third equation, and the fifth equation are displayed on the same coordinate set in the coordinate range for the second equation. Is displayed on the screen (step A6).

In this case, the coordinate areas common to the inequalities of the second and third equations are displayed separately by inversion or the like. On the other hand, as the functional expression to be graphed by the operation of the cursor key (not shown), the second expression “Y ≧ x
² ”, the third formula“ Y <x + 2 ”, and the fifth formula“ Y = −x ² ”, and the display mode is operated by operating the“ divide ”key 18 to divide and display the specified plural formulas. Is designated (steps A2 and A3).

Then, since three function expressions to be graphed are specified, it is decided that the display screen is divided into four,
The first quadrant 12a is divided into four vertically and horizontally in the graphic display unit 12, the first quadrant 12a is a second expression graph display area, the second quadrant 12b is a third expression graph display area, and the third quadrant 12c is a fifth expression graph display area. The area set as "FIG. 6 (C)"
Reference ”(step A7).

Then, in order to graph each function expression, the corresponding coordinate range is set to 32 dots vertically × 6 pixels horizontally.
The positions of the dots displayed by setting the display range of 4 dots are calculated, and the graph of the second formula in which the display positions are calculated in the range of 32 dots in the vertical direction × 64 dots in the horizontal direction is displayed in each of the display dots. By adding 32 dots in the Y direction to the graphic display unit 12 as shown in FIG.
The offset display is performed in the first quadrant 12a divided into four above.

For the third equation, 32 dots × 6
When the display position is calculated within 4 dots, the graph remains as it is, as shown in FIG. 6C, the second quadrant 12b.
Is displayed in.

The graph of the fifth equation shows that the calculated display dots are 64 dots in the X direction and 32 dots in the Y direction.
By adding dots, as shown in FIG. 6C, an offset is displayed in the third quadrant 12c (step A8,
A9).

As a result, the arbitrarily designated functional expressions are
The images are divided and displayed on separate display areas adjacent to each other corresponding to the respective coordinate ranges. On the other hand, when a divided or combined graph is displayed,
When the "divide" key 18, the "composite" key 17, and the "copy" key 19 are operated, the process shown in the flowchart of FIG. 5 is executed. First, when the "divide" key 18 in the key input unit 11 is operated, it is determined whether or not the composite display is being performed (step B1 → B2).

If the composite display is in progress, the graphs of the respective function formulas that are composite-displayed on the same coordinates are displayed in the steps A7-
In accordance with the divided graphing process in A9, each is recalculated on each individual coordinate range and, as shown in FIG. 6C, is divided and displayed for each corresponding quadrant 12a, 12b, 12c ( Step B3).

On the other hand, as shown in FIG. 6C, in the state where the graphs corresponding to the three functional expressions are divided and displayed,
When the "composite" key 17 is operated (step B
4) Next, by operating a cursor key (not shown) or the like, for example, the graph of the second formula displayed in the first quadrant 12a and the graph of the third formula displayed in the second quadrant 12b are sequentially designated (step B5 ), And the subsequent operation of the “EXE” key 20 causes the graph of the third formula to be recalculated in correspondence with the coordinate range of the graph of the second formula that was initially specified, and FIG.
As shown in, the composite image is displayed in the first quadrant 12a on the same coordinates as the graph of the second equation (step B6).

Further, FIG. 6C or FIG.
As shown in (D), when the "copy" key 19 is operated in the state where the graphs corresponding to the three functional expressions are divided and displayed (step B7), the cursor key or the like not shown next is operated. Then, for example, when the graph of the third formula displayed in the second quadrant 12b and the graph of the fifth formula displayed in the third quadrant 12c are sequentially designated (step B8), the subsequent operation of the "EXE" key 20 In response, the first designated graph of the second quadrant 12b is copied and displayed on the graph of the third quadrant 12c by overlapping the dot data as it is under the OR condition (step B9).

Therefore, according to the above-described graph display device, the numerical / symbol keys 14 of the key input unit 11 are operated to input and store a plurality of functional expressions to be graphed and their coordinate ranges in advance. In this state, operate the “list” key 16 to display all of the plural expressions on the display unit 12,
When the "composite" key 17 is operated by designating an arbitrary plural expression, each designated expression is graphically displayed according to the coordinate range of the first designated functional expression, and the arbitrary plural expression is designated. When the "divide" key 18 is operated, the graphs are separately displayed and divided according to the corresponding coordinate ranges.

Further, when the "composite" key 17 is operated to specify two graphs in the divided display state, "EX" is displayed.
In response to the operation of the "E" key 20, the other graph is combined and displayed on the same coordinate as the one graph, and when the "copy" key 19 is operated to specify two graphs, "EX" is displayed.
In response to the operation of the "E" key 20, one of the graphs is copied and displayed on the other graph.

Therefore, for example, a plurality of equations can be graphed on their respective coordinates and displayed in contrast, or selectively synthesized and displayed, so that individual graphs can be freely analyzed in relation to other graphs. Will be able to.

In the above embodiment, the function expression to be graphed and the graph to be synthesized or copied are specified by using a key operation means such as a cursor key. A touch panel may be stacked on the unit 12 and various designating operations may be performed by pressing the touch panel.

Further, in the above embodiment, in order to store the graphed data corresponding to each functional expression in the RAM 24, the display data itself consisting of 64 dots in the vertical direction and 128 dots in the horizontal direction are stored in the frame memory as a bitmap. However, since each graphing data requires a large memory capacity, the number of display dots for the X coordinate (1
28 dots) only Y dot coordinates individually corresponding to Y1,
It may be stored as Y2, ..., Y128.

[0042]

As described above, according to the first graph display control device of the present invention, since a large number of function expressions are displayed in a list and a plurality of function expressions to be combined are designated, a large number of function expressions are selected. It is possible to appropriately and easily specify the function expression of the graph to be synthesized while checking the function expression in the list. In addition, according to the operation of the first operation means, a plurality of graphs of functional expressions are combined to form one of the plurality of graphs.
It is possible to simultaneously display on the same coordinate in a preset coordinate range . Further, in accordance with the operation of the second operation means, a plurality of graphs of the function formulas that are combined and displayed simultaneously are individually displayed in a coordinate range preset for each graph.
It will be possible to display them on different coordinates .

Further, according to the second graph display device of the present invention, further, in accordance with the operation of the third operation means, respectively.
One of the graphs displayed on different coordinates
Copy the graph on the other graph and display it
You can Thus, according to the present invention, the first operating hand
Depending on the step operation, multiple graphs can be
Are displayed on the same coordinate in the coordinate range set for
Can be made. This makes each graph easy and accurate.
You can check by comparing. Not only that, but the second operator
Depending on the step operation, multiple graphs displayed simultaneously can be displayed.
Separate coordinates with preset coordinate range for each graph
Can be displayed individually on top. For this reason, each graph
Easily and accurately on separate coordinates with separate coordinate ranges
You can check. Also, on separate coordinates
Of the displayed graphs, one graph can be
You can also copy it on top of it and display it on top of it for confirmation.
It

[Brief description of drawings]

FIG. 1 is an external view showing a graph display device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an electronic circuit of the graph display device.

FIG. 3 is a flowchart showing an expression input graphing process by the graph display device.

FIG. 4 is a flowchart showing a combination / division graphing process of a plurality of expressions by the graph display device.

FIG. 5 is a flowchart showing division / synthesis / copy processing in a graph display state by the graph display device.

6A and 6B are diagrams showing a display state of a graphic display unit associated with the graphing display processing of the graph display device, wherein FIG. 6A is a diagram showing a list display state of input formulas, and FIG. Is a diagram showing a graphing composite display state of a plurality of formulas, (C) is a diagram showing a graphing division display state of a plurality of formulas, and (D) is a designated graph composition in a graphing division display state of a plurality of formulas The figure which shows a display state.

[Explanation of symbols]

10 ... Device main body, 11 ... Key input part, 12 ... Graphic display part, 13 ... "ON" key, 14 ... Numerical / symbol key, 15 ... "Graph" key, 16 ... "List" key, 17
... "composite" key, 18 ... "divide" key, 19 ... "copy" key, 20 ... "EXE" key, 21 ... CPU (central processing unit), 22 ... display buffer, 23 ... ROM, 24
... RAM, 25a, 25b, ... Expression register, 26a, 2
6b, ... Range register.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 61-256380 (JP, A) JP 61-256460 (JP, A) JP 4-1533862 (JP, A) JP 5- 173976 (JP, A) JP-A-1-73418 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06T 11/20 G09G 5/36 G06F 15/02

Claims (3)

(57) [Claims] 1. A list display control means for performing control to display a large number of function expressions in a list, and a plurality of function expressions for a graph to be synthesized from among the plurality of function expressions listed by the control of the list display control means. and wherein designating means for designating a first operating means is operated when synthesizing the graph, according to the operation of the first operating means, the equation specifying means
The plurality of graphene multiple graphs of functions expression specified more
One of the graphs has a preset coordinate
A synthesis display control means for simultaneously displaying synthesized on the same coordinates di, and second operating means that is operated when displaying individual graphs of multiple functional expression, operation of the second operating means According to the above, the composite display control
Each the respective graphs are simultaneously displayed graph by the control means
Each seat has its own coordinate range set in advance.
A graph display control device comprising: an individual display control means for displaying on an elevation. 2. The graph display control device according to claim 1.
In this case, the third operation means operated when copying the graph, and the individual display control according to the operation of the third operation means.
By means of control of the means, each group is displayed on a different coordinate.
Of the rough, copy one graph onto the other
And a copy display control means for displaying the same in a superimposed manner . A list display control step of performing 3. A control for listing a number of function type, after the function expression of the graph to be synthesized from among the list displayed the plurality of function formula is specified more, graph When the first operation means for operating when synthesizing is operated, the graph of the specified plurality of functional expressions is preliminarily displayed in one of the plurality of graphs according to this operation.
Second operating means is operated in order to operate a composite display control step of simultaneously displaying synthesized on the same coordinates, when displaying individually graph of multiple functional expression in coordinate ranges that are set When, in response to this operation, the respective graphs said co displayed for each said each graph
A graph display control method, comprising: an individual display control step of individually displaying on a separate coordinate in a preset coordinate range .