JPH1097501A - Display device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To easily recognize a process of changing a graph by a primary transformation in an electronic computing device having a primary transformation function of moving an arbitrary coordinate point to a different coordinate point by a primary transformation. In a primary conversion mode, a desired graph function expression “Y = X” and a conversion matrix [3,
4,5,6] and an arbitrary number of conversion stages n (=
When the drawing process is performed by creating the graph data by the primary conversion by setting 4), the setting from the unit matrix [1,0,0,1] to the final conversion matrix [3,4,5,6] is performed. The number of conversion stages n (=
Four-stage transformation matrix divided into 4) [1.5,1,1.25,2.25]
[2,2,2.5,3.5] [2.5,3,3.75,4.75] [3,4,5,6] are obtained, and the graph function formula “Y =
The primary conversion of “X” is performed, and the corresponding graph data is drawn and displayed on the liquid crystal display unit 16 in order.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display device having a graph display function.

[0002]

2. Description of the Related Art Conventionally, in a display device having a function calculation function, a coordinate point corresponding to input coordinate data is plotted and displayed on a display screen together with coordinate axes, or an arbitrary function expression is input. A graph capable of drawing and displaying a corresponding graph together with coordinate axes on a display screen has been put to practical use.

Further, in such a display device, coordinate points plotted and displayed corresponding to arbitrary coordinate data are represented by:
A device having a conversion function of performing conversion and moving to a different coordinate position for display has also been put to practical use.

That is, after inputting certain coordinate data and plotting and displaying the corresponding coordinate points, when an angle for conversion is set and execution of the conversion is instructed, the initial coordinate data changes the coordinates (0, 0). The display is shifted to the center by the set angle, and is displayed by moving the coordinate point corresponding to the initial coordinate data by the set angle.

[0005]

However, in the conversion function of the conventional display device, the coordinate points corresponding to the initial coordinate data are displayed directly in place of the desired converted coordinate points. The change state of the movement of the coordinate point in the process cannot be known.

[0006] For this reason, there is a problem that it is difficult to grasp the change image due to the transformation of the coordinate points. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and it is possible to easily recognize a process of changing coordinate data plotted and displayed, and also coordinate data such as a drawn graph, by coordinate conversion. It is an object to provide a display device that can be used.

[0007]

That is, a display device according to a first aspect of the present invention comprises: coordinate data input means for inputting coordinate data indicating an arbitrary coordinate point on coordinates; Conversion formula data input means for inputting conversion formula data for converting the input coordinate data, and a conversion formula for calculating a plurality of different conversion formula data based on the conversion formula data input by the conversion formula data input means. The coordinate data input by the coordinate data input means is sequentially converted by the data calculation means and the plurality of conversion formula data calculated by the conversion formula data calculation means and the conversion formula data input by the conversion formula data input means. Coordinate data converting means and coordinate points corresponding to the coordinate data converted by the coordinate data converting means are sequentially displayed. Characterized by comprising a coordinate display means for.

That is, in the display device according to the first aspect of the present invention, when arbitrary coordinate data to be subjected to coordinate conversion is input and conversion formula data for converting the coordinate data is input, the input is performed. A plurality of different conversion formula data are calculated based on the conversion formula data, and the input coordinate data is sequentially converted by the calculated plurality of conversion formula data and the input conversion formula data. Since the coordinate points corresponding to the coordinate data are sequentially displayed, it is possible to easily see the change in the movement of the coordinates in the course of the coordinate conversion.

Further, the display device according to claim 2 of the present invention comprises: function data input means for inputting arbitrary function data to be subjected to coordinate transformation; matrix data input means for inputting arbitrary matrix data; A dividing unit that divides the matrix data input by the matrix data input unit into a plurality of matrix data between a unit matrix and a plurality of matrix data divided by the dividing unit; Calculating means for multiplying the function data input by the function data input means to obtain the corresponding function data after coordinate conversion; and calculating the coordinate data by the plurality of divided matrix data sequentially obtained by the calculating means. And a conversion process display means for sequentially displaying respective coordinate points corresponding to the respective function data.

That is, in the display device according to the second aspect of the present invention, when arbitrary function data to be subjected to coordinate conversion is input and arbitrary matrix data is input, the input matrix data is converted into a unit matrix. The matrix data is divided into a plurality of matrix data between the matrix data, and the matrix data close to the unit matrix of the divided plurality of matrix data is sequentially multiplied by the input function data to obtain each corresponding function data after coordinate transformation. The coordinate points corresponding to each function data after the coordinate conversion by the plurality of divided matrix data obtained in the order are sequentially displayed, so that the change of the movement of the function coordinates in the coordinate conversion process can be easily performed. You can see it.

A display device according to a third aspect of the present invention is the display device according to the second aspect, further comprising:
A conversion step number specifying means for specifying a conversion step number of the coordinate conversion, wherein the dividing means specifies the matrix data input by the matrix data input means with a unit matrix by the conversion step number specifying means. A dividing means for dividing the data into matrix data corresponding to the number of coordinate transformation steps is provided.

That is, in the display device according to the third aspect of the present invention, when arbitrary function data to be subjected to coordinate transformation is input and arbitrary matrix data is input, the input matrix data is converted to a unit matrix. The matrix data is divided into matrix data for the number of coordinate transformation stages designated by the transformation stage number designation means, and the matrix data for the divided designated transformation stages is sequentially input from the matrix data close to the unit matrix. Multiplied by the function data, the corresponding coordinate-converted function data is obtained, and the respective coordinate points corresponding to the function data after the coordinate conversion by the matrix data for the designated number of conversion steps determined in the order are obtained. Since the display is sequentially performed, the change in the movement of the function coordinates in the process of the coordinate conversion can be divided into arbitrary stages and easily viewed.

A display device according to a fourth aspect of the present invention is the display device according to the second or third aspect, further comprising a range designating means for designating a coordinate range, and the arithmetic means Is multiplied in order from the matrix data close to the unit matrix of the plurality of matrix data divided by the dividing means within the range of the coordinates specified by the range specifying means by the function data input by the function data input means. In addition, a calculation means for obtaining the function data after each corresponding coordinate conversion is provided.

That is, in the display device according to a fourth aspect of the present invention, the coordinate data specified by the range specifying means is sequentially added to the input function data from the matrix data close to the unit matrix of the plurality of divided matrix data. And the corresponding coordinate-converted function data is obtained.
The respective coordinate points corresponding to the respective function data after the coordinate conversion by the plurality of divided matrix data obtained in the order are sequentially displayed, so that the change in the movement of the function coordinates in the coordinate conversion process is designated. It can be easily seen only within the coordinates within the range.

[0015]

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 having a function calculation function according to an embodiment of the present invention.

The electronic computer includes a control unit (CPU) 1
1 is provided. The control unit (CPU) 11 starts a system program stored in the ROM 13 in response to a key operation signal from the key input unit 12, and executes operation control of each circuit unit according to the system program. The unit (CPU) 11 is connected to a RAM 14 in addition to the key input unit 12 and the ROM 13, and a liquid crystal display unit 16 is displayed via a display drive circuit 15.

The key input unit 12 includes a data input key 12 comprising numeric keys, symbol keys, function keys, and the like.
a, a "menu" key 12b operated when displaying a menu screen for selecting an operation mode such as a calculation mode, a graph mode, a primary conversion mode, etc., for instructing various data selections and execution of setting functions. "Execution" operated
Key 12c, "Graph ← → Expression" key 12d operated when switching between the display state of a function expression and the display state of a graph corresponding to the function expression during operation in the graph mode or the primary conversion mode, a display screen A "@" key 12e, a "@" key 12f, and the like used for performing a cursor moving operation, a data selection operation, and the like described above are provided.

The ROM 13 stores in advance a system program for controlling the entire operation of the electronic computer, and corresponds to various operation modes selectable on a menu screen, such as a calculation mode, a graph mode, and a primary conversion mode. A control processing program and the like are stored in advance.

The RAM 14 includes a display register 14a, an expression register 14b, a graph register 14c, a matrix register 14d, a conversion stage number (n) register 14e, and a conversion number (a) register 14f.

The display register 14a includes a liquid crystal display 16
Is developed and stored as bitmap data. The expression register 14b stores expression data such as a function expression input by the data input key 12a of the key input unit 12.

In the graph register 14c, in the graph mode or the primary conversion mode, the input function expression or graph data corresponding to the linearly converted function expression is drawn as bitmap data.

The matrix register 14d stores, in the primary conversion mode, arbitrarily input and set matrix data for performing a primary conversion by multiplying the expression data for graph drawing stored in the expression register 14b. .

The conversion stage number (n) register 14e has an arbitrarily input and set conversion stage number n for calculating the primary conversion process of the graph stepwise in the primary conversion mode.
Is set.

The conversion number (a) register 14f stores, in the primary conversion mode, a conversion number a indicating the number of conversion stages in the primary conversion process based on the conversion stage number n.
Is set.

Next, the operation of the electronic computer provided with the function calculating function according to the above configuration will be described. FIG. 2 is a flowchart showing the overall processing in the electronic computer.

When the system power of the electronic computer is turned on and the "menu" key 12b of the key input unit 12 is operated,
A menu screen for selecting an operation mode such as a calculation mode, a graph mode, and a primary conversion mode is displayed on the liquid crystal display unit 16 (step S1 → S2).

In the display state of the menu screen, cursor keys "@" key 12e and "@" key 12f
Is selectively operated to select a desired operation mode, a control program corresponding to the selected operation mode is started, and an initial screen corresponding to the selected operation mode is displayed on the liquid crystal display unit 16 (step S3). → S4, S5 → S
6).

When the calculation mode is selected by the selection of the operation mode, the calculation mode processing is started (steps S7 → S8). When the graph mode is selected, the graph mode processing is performed. Is activated (steps S9 → S10), and when the primary conversion mode is selected, the primary conversion mode processing is activated (steps S11 → SA).

FIG. 3 is a flowchart showing the primary conversion mode processing in the electronic computer. FIG. 4 is a diagram showing an expression input display state at the initial stage of the primary conversion mode processing in the electronic computing device.

FIG. 5 is a view showing a graph display state corresponding to a stepwise execution process of the primary conversion accompanying the primary conversion mode processing in the electronic computer. That is, when the primary conversion mode processing in FIG. 3 is started by the operation mode selection setting operation on the menu screen, FIG.
As shown in (A), the initial graph function is expressed as “Y =
, The drawing range of the graph in the x direction is “x = 〜”, the number of stages of the primary conversion is “n =”, and the primary conversion matrix is “matrix”.
A formula input display screen for inputting and setting by the user is displayed on the liquid crystal display unit 16.

In the display state of the equation input display screen in the primary conversion mode, the key input unit 12 displays "graph ← →
When the "expression" key 12d is operated, the RAM 1
4, the graph data stored in the graph register 14c is read out and written into the display register 14a in accordance with the function formula stored in the expression register 14b, and the liquid crystal display unit 16 is substituted for the expression input display screen. (Step A1 → A2 → A3, A4).

Further, in the display state of the expression input display screen as shown in FIG. 4A, the data input key 12a of the key input section 12 is selectively operated as shown in FIG. 4B. The initial graph function expression to be subjected to the primary conversion is “Y = X”, and the drawing range of the graph in the x direction is “x = −2 to
2 ", the number of stages of the primary transformation is" n = 4 ", and the primary transformation matrix is" matrix a, b, c, d = 3, 4, 5, 6 ". X ”and its x-direction drawing range“ x = −2 to 2 ”are stored in the expression register 14 b in the RAM 14, and the number of stages of the primary conversion“ n =
"4" is set in the conversion stage number register 14e in the RAM 14, and the primary conversion matrix "matrix 3, 4, 5, 6" is stored in the matrix register 14d in the RAM 14 (steps A1, A2, A5, A6). ).

Here, the conversion number register 14f in the RAM 14 is initially set as the conversion number a = 1.
When the "execute" key 12c of the key input unit 12 is operated in a state where the data of each item in the expression input display screen is input and set, the primary function of the graph function expression is stored in each data register in the RAM 14. It is determined that the data necessary for conversion has been set, and
The matrix data for primary conversion “3, 4, 5, 6” stored in the matrix register 14 d in the unit matrix “1, 0,
0, 1 ", the number n of primary conversion stages (=) set in the conversion stage number register 14e in the RAM 14.
4), the four matrix data “1.5, 1, 1.25, 2.2” divided into four stages.
5 ", 2,2,2.5,3.5""2.5,3,3.7"
5,4.75 ”and“ 3,4,5,6 ”are each“ 1 ”
４ “4” and stored in the matrix register 14d (steps A7 → A8 → A9).

The expression register 14b in the RAM 14
If it is determined that the x-direction drawing range is set as “x = −2 to 2”, the expression register 14 is set within the set x-direction drawing range “x = −2 to 2”.
Graph data corresponding to the graph function expression “Y = X” stored in b is created and drawn and stored in the graph register 14c, and is also transferred and written to the display register 14a, as shown in FIG. Is displayed on the liquid crystal display unit 16 (step A10 → A11a).

In this way, graph data corresponding to the graph function expression “Y = X” to be subjected to the primary conversion is created, and as shown in FIG. 5A, the set x-direction drawing range “x = − When the image is drawn and displayed on the liquid crystal display section 16 within the range of "2 to 2", the RAM 1 is set in accordance with the conversion number a (= 1) set in the conversion number register 14f in the RAM 14.
The "1" -th matrix data "1.5, 1, 1.25, 2.25" stored in the matrix register 14d in the X-direction drawing range corresponding to the graph function expression "Y = X" Graph data multiplied by each (x, y) data in “x = −2 to 2” is created and drawn in the graph register 14c, and as shown in FIG. Is displayed on the liquid crystal display unit 16 in place of the graph data corresponding to the initial graph function formula "Y = X" (steps A12a and A13a).

At the same time, the “1” -th matrix data “1.5, 1, 1.25, 2..
25 "is displayed on the liquid crystal display unit 16 as reference (step A).
14a).

Here, the conversion number a (= 1) set in the conversion number register 14f is the primary conversion step number n (= 4) set in the conversion step number register 14e.
, That is, the final transformation matrix “3, 4,
It is determined whether the primary conversion corresponding to "5, 6" has been performed (step A15a).

In this case, the conversion number a set in the conversion number register 14f is "1", and the primary conversion step number n (=
4), the conversion number a
Is incremented and set to "2", and the process returns to the process from step A12a again (step A1).
5a → A16a → A12a).

Then, according to the conversion number a (= 2) which is incremented and set in the conversion number register 14f in the RAM 14, the matrix register 1 in the RAM 14 is set.
4d, “2” -th matrix data “2,
2,2.5,3.5 "correspond to each of the (x, -2) in the x-direction drawing range" x = -2 to 2 "corresponding to the graph function expression" Y = X ".
y) Graph data multiplied by the data is created and drawn in the graph register 14c. As shown in FIG. 5C, the first-stage conversion matrix is converted into graph data corresponding to the second-stage conversion matrix. The data is displayed on the liquid crystal display unit 16 instead of the corresponding graph data (steps A12a and A12a).
13a).

At the same time, the "2" -th matrix data "2, 2, 2.5, 3.5", which is the conversion matrix, is displayed on the liquid crystal display section 16 with reference (step A14).
a). In this case, the conversion number a set in the conversion number register 14f is “2”, and it is determined that the conversion number a has not reached the primary conversion stage number n (= 4) set in the conversion stage number register 14e. Therefore, the conversion number a is incremented and set to “3”, and the process returns to the process from step A12a again (step A15a →
A16a → A12a).

Then, according to the conversion number a (= 3) which is incremented and set in the conversion number register 14f in the RAM 14, the matrix register 1 in the RAM 14 is set.
4d stored in the “3” -th matrix data “2.
5,3,3.75,4.75 ”is the graph function expression“ Y
= X ”, graph data multiplied by each (x, y) data in the x-direction drawing range“ x = −2 to 2 ”is created and drawn in the graph register 14c, and FIG.
As shown in (1), the liquid crystal display unit 16 displays the graph data according to the third-stage transformation matrix in place of the graph data according to the second-stage transformation matrix (step A1).
2a, A13a).

At the same time, the “3” -th matrix data “2.5, 3, 3.75, 4..
75 ”is displayed on the liquid crystal display unit 16 (step A).
14a).

In this case, the conversion number a set in the conversion number register 14f is "3", and the primary conversion step number n (=
4), the conversion number a
Is further incremented and set to "4", and returns to the processing from step A12a again (steps A15a → A16a → A12a).

Then, according to the conversion number a (= 4) which is incremented and set in the conversion number register 14f in the RAM 14, the matrix register 1 in the RAM 14 is set.
The 4th matrix data “3,” stored in 4d
4, 5, 6 "is multiplied by each (x, y) data in the x-direction drawing range" x = -2 to 2 "corresponding to the graph function expression" Y = X "to create graph data. As shown in FIG. 5 (E), the liquid crystal display 16 is rendered in the graph register 14c and replaced with the graph data corresponding to the fourth stage, that is, the third stage conversion matrix, as the graph data corresponding to the final conversion matrix. (Step A12a,
A13a).

At the same time, the "4" -th final matrix data "3, 4, 5, 6", which is the conversion matrix, is displayed on the liquid crystal display section 16 with reference (step A14a). Then, the conversion number a set in the conversion number register 14f is “4”, and it is determined that the primary conversion stage number n (= 4) set in the conversion stage number register 14e has been reached, and FIG. As shown in F), the primary graph data corresponding to the conversion target graph function formula "Y = X" drawn and stored in the graph register 14c, and the first-to-fourth conversion matrices are sequentially obtained. The converted graph data are all displayed collectively on the liquid crystal display unit 16 (step A15a → A17).

On the other hand, in step A10, RA
If it is determined that the drawing range in the x direction is not set in the expression register 14b in M14, the graph data corresponding to the graph function expression “Y = X” stored in the expression register 14b is stored in the x direction. It is created for the coordinate range, drawn and stored in the graph register 14c, transferred to the display register 14a, written, and displayed on the liquid crystal display unit 16 (step A10 → A11b).

As described above, when the graph data corresponding to the graph function expression “Y = X” to be subjected to the primary conversion is created for the entire coordinate range in the x direction, and is drawn and displayed on the liquid crystal display unit 16, According to the conversion number a (= 1) set in the conversion number register 14f in the RAM 14, the "1" -th matrix data "1.5, 1, 1... 25,
2.25 ”is x corresponding to the graph function expression“ Y = X ”.
Graph data multiplied by each (x, y) data in the entire direction coordinate range is created and drawn in the graph register 14c, and the initial graph function expression “Y = The data is displayed on the liquid crystal display unit 16 in place of the graph data corresponding to "X" (steps A12b and A13b).

At the same time, the “1” -th matrix data “1.5, 1, 1.25, 2..
25 "is displayed on the liquid crystal display unit 16 as reference (step A).
14b).

Here, the conversion number a (= 1) set in the conversion number register 14f is the primary conversion step number n (= 4) set in the conversion step number register 14e.
, That is, the final transformation matrix “3, 4,
It is determined whether the primary conversion corresponding to "5, 6" has been performed (step A15b).

In this case, the conversion number a set in the conversion number register 14f is "1", and the primary conversion step number n (=
4), the conversion number a
Is incremented and set to "2", and returns to the processing from step A12b again (step A1b).
5b → A16b → A12b).

Then, according to the conversion number a (= 2) which is incremented and set in the conversion number register 14f in the RAM 14, the matrix register 1 in the RAM 14 is set.
4d, “2” -th matrix data “2,
2,2.5,3.5 "is multiplied by each (x, y) data in the entire x-direction coordinate range corresponding to the graph function formula" Y = X "to create a graph register 1.
4c, and is displayed on the liquid crystal display unit 16 as graph data according to the second-stage transformation matrix in place of the graph data according to the first-stage transformation matrix (step A).
12b, A13b).

At the same time, the "2" -th matrix data "2, 2, 2.5, 3.5", which is the conversion matrix, is displayed on the liquid crystal display section 16 with reference (step A14).
b). In this case, the conversion number a set in the conversion number register 14f is “2”, and it is determined that the conversion number a has not reached the primary conversion stage number n (= 4) set in the conversion stage number register 14e. Therefore, the conversion number a is incremented and set to “3”, and the process returns to the process from step A12b again (step A15b →
A16b → A12b).

Then, according to the conversion number a (= 3) which is incremented and set in the conversion number register 14f in the RAM 14, the matrix register 1 in the RAM 14
4d stored in the “3” -th matrix data “2.
5,3,3.75,4.75 ”is the graph function expression“ Y
= X ”, graph data multiplied by each (x, y) data in the entire x-direction coordinate range is created and drawn in the graph register 14c, and is converted into graph data according to a third-stage transformation matrix. The data is displayed on the liquid crystal display unit 16 instead of the graph data corresponding to the two-stage transformation matrix (steps A12b and A13b).

At the same time, the “3” -th matrix data “2.5, 3, 3.75, 4..
75 ”is displayed on the liquid crystal display unit 16 (step A).
14b).

In this case, the conversion number a set in the conversion number register 14f is "3", and the primary conversion stage number n (=) set in the conversion stage number register 14e.
4), the conversion number a
Is further incremented and set to "4", and returns to the processing from step A12b again (steps A15b → A16b → A12b).

Then, according to the conversion number a (= 4) which is incremented and set in the conversion number register 14f in the RAM 14, the matrix register 1 in the RAM 14 is set.
The 4th matrix data “3,” stored in 4d
4, 5, 6 "is multiplied by each (x, y) data in the entire coordinate range in the x direction corresponding to the graph function expression" Y = X ", and is drawn in the graph register 14c. Four stages, ie, graph data corresponding to the final transformation matrix are displayed on the liquid crystal display unit 16 in place of the graph data corresponding to the third stage transformation matrix (steps A12b and A13b).

At the same time, the "4" -th final matrix data "3, 4, 5, 6", which is the conversion matrix, is displayed on the liquid crystal display section 16 with reference (step A14b). Then, the conversion number a set in the conversion number register 14f is "4", and it is determined that the number of primary conversion stages n (= 4) set in the conversion stage number register 14e has been reached, and the graph register 14c, the initial graph data corresponding to the conversion target graph function expression “Y = X” which is drawn and stored for the entire coordinate range in the x direction;
The respective graph data that have been linearly transformed according to the transformation matrices in the first to fourth stages are all displayed collectively on the liquid crystal display unit 16 (step A15b → A17).

By inputting a desired graph function formula and a desired linear transformation matrix, and setting the number of conversion stages arbitrarily and executing graph data creation / drawing processing by linear transformation, the final transformation matrix is obtained. By the time the primary conversion is performed and the graph is displayed, the process of the primary conversion is divided into n stages and the graph is displayed in order, and the change state of the movement of the graph in the primary conversion process can be easily performed. Will be able to know.

Further, the desired graph function formula and the desired primary transformation matrix were input, and the number n of transformation steps and the rendering range in the x direction were set arbitrarily to execute the rendering processing for creating graph data by primary transformation. In this case, the graph data at each conversion stage is created and drawn and displayed only within the set x-direction drawing range, and not only the change state of the movement of the graph in the primary conversion process but also the set x coordinate It also becomes possible to easily know the change state of the graph length within the range.

On the other hand, when the "graph->expression" key 12d of the key input unit 12 is operated during the drawing display of each graph data accompanying the primary conversion processing, the data is stored in the expression register 14b in the RAM 14. The graph function formula is read out and switched to the liquid crystal display unit 16 instead of the graph data that has been displayed until then (step A1).
8 → A19 → A20, A21).

Thus, the relationship between the graph data currently displayed on the liquid crystal display unit 16 and the function of the graph can be easily compared and compared. Therefore, according to the electronic computing device having the function calculating function of the above configuration, in the primary conversion mode, the desired graph function expression “Y = X” and the conversion matrix “3,
4,5,6 "and any number of conversion stages n
When (= 4) is set and graph data creation and drawing processing is performed by primary conversion, the range from the unit matrix “1,0,0,1” to the final conversion matrix “3,4,5,6” is obtained. Four-stage transformation matrices “1.5, 1, 1.25, 2.25”, “2, 2, 2...” Divided into the set number of transformation stages n (= 4).
5, 3.5 "," 2.5, 3, 3.75, 4.75 "
"3,4,5,6" are obtained, and the linear transformation of the graph function formula "Y = X" is sequentially performed according to the transformation matrix of each stage.
The corresponding graph data is sequentially displayed on the liquid crystal display unit 16.
, The change state of the movement of the graph in the primary conversion process can be clearly recognized.

Therefore, it is easy to grasp the change image by the primary conversion of the graph. In the above-described embodiment, the primary conversion is performed on the graph function expression to recognize how the drawing state of the graph data moves and changes in the course of the primary conversion. However, the arbitrary coordinate point (x , Y), it is possible to easily recognize the movement state of the coordinate point in the course of the primary conversion, as described above. Further, in the present embodiment, the primary transformation is used as the coordinate transformation method, but another coordinate transformation method may be used.

[0063]

As described above, according to the display device according to the first aspect of the present invention, arbitrary coordinate data to be subjected to coordinate conversion is input, and conversion formula data for converting the coordinate data is input. Is input, the plurality of different conversion formula data are calculated based on the input conversion formula data, and the input coordinate data is sequentially calculated based on the calculated plurality of conversion formula data and the input conversion formula data. Are converted, and the coordinate points corresponding to the converted coordinate data are sequentially displayed, so that a change in the movement of the coordinates in the process of the coordinate conversion can be easily seen.

According to the display device of the second aspect of the present invention, when arbitrary function data to be subjected to coordinate transformation is inputted and arbitrary matrix data is inputted, the inputted matrix data becomes a unit matrix. Is divided into a plurality of matrix data, and the divided plurality of matrix data is multiplied by the input function data in order from the matrix data close to the unit matrix to obtain the corresponding coordinate-converted function data. Are obtained, and the respective coordinate points corresponding to the respective function data after the coordinate conversion by the plurality of divided matrix data obtained in the order are sequentially displayed, so that the change of the movement of the function coordinates during the coordinate conversion process Can be seen easily.

According to the display device of the third aspect of the present invention, when arbitrary function data to be subjected to coordinate transformation is input and arbitrary matrix data is input, the input matrix data is converted into a unit matrix. Is divided into matrix data for the number of coordinate transformation stages designated by the transformation stage number designation means, and the divided matrix data for the designated number of transformation stages are input in order from the matrix data close to the unit matrix. The corresponding function data after coordinate conversion is obtained by multiplying the obtained function data, and the respective coordinates corresponding to the respective function data after coordinate conversion by the matrix data for the designated number of conversion steps obtained in the order. Since the points are displayed sequentially,
The change in the movement of the function coordinates in the process of coordinate conversion can be divided into arbitrary stages and easily seen.

According to the display device of the fourth aspect of the present invention, the input function data is specified by the range specifying means in order from the matrix data close to the unit matrix of the plurality of divided matrix data. The corresponding coordinate-converted function data is obtained by multiplying within the range of the coordinates obtained, and the respective coordinate points corresponding to the respective function data after the coordinate conversion by the plurality of divided matrix data obtained in the order. Are sequentially displayed, so that the change in the movement of the function coordinates in the course of the coordinate conversion can be easily seen by limiting the change to the coordinates within the designated range.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic circuit of an electronic computing device having a function calculating function according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an overall process in the electronic computer.

FIG. 3 is a flowchart showing primary conversion mode processing in the electronic computer.

FIG. 4 is an exemplary diagram showing an expression input display state in an initial stage of activation of a primary conversion mode process in the electronic computer.

FIG. 5 is a view showing a graph display state corresponding to a stepwise execution process of a primary conversion accompanying a primary conversion mode process in the electronic computer.

[Explanation of symbols]

 11: Control unit (CPU), 12: Key input unit, 12a: Data input key, 12b: "Menu" key, 12c: "Execute" key, 12d: "Graph ← → formula" key, 13: ROM, 14 ... RAM, 14a: display register, 14b: formula register, 14c: graph register, 14d: matrix register, 14e: number of conversion stages (n) register, 14f: conversion number (a) register, 15: display drive circuit, 16: liquid crystal Display section.

Claims (4)

[Claims] 1. Coordinate data input means for inputting coordinate data indicating an arbitrary coordinate point on coordinates, and conversion formula data for inputting conversion formula data for converting the coordinate data input by the coordinate data input means. Input means, conversion formula data calculation means for calculating a plurality of different conversion formula data based on the conversion formula data input by the conversion formula data input means, and a plurality of conversions calculated by the conversion formula data calculation means Coordinate data conversion means for sequentially converting coordinate data input by the coordinate data input means according to the equation data and the conversion equation data input by the conversion equation data input means; coordinate data converted by the coordinate data conversion means And a coordinate display means for sequentially displaying coordinate points corresponding to (1) and (2). 2. Function data input means for inputting arbitrary function data to be subjected to coordinate transformation, matrix data input means for inputting arbitrary matrix data, and matrix data input by the matrix data input means as a unit. Dividing means for dividing the matrix data into a plurality of matrix data; and dividing the plurality of matrix data divided by the dividing means from matrix data close to the unit matrix to the function data input by the function data input means in order. Calculating means for multiplying each corresponding function data after coordinate conversion; and calculating each coordinate point corresponding to each function data after coordinate conversion by each of the plurality of divided matrix data obtained in order by the calculating means. A display device comprising: conversion process display means for sequentially displaying. 3. The apparatus according to claim 1, further comprising a conversion stage number designating unit for designating the number of stages to be coordinate-transformed, wherein the dividing unit converts the matrix data input by the matrix data input unit into a unit matrix. 3. The display device according to claim 2, wherein the display device is a dividing unit that divides the data into matrix data corresponding to the number of coordinate transformation steps designated by the number designating unit. 4. A range designating means for designating a range of coordinates, wherein the calculating means inputs the function data in order from matrix data close to the unit matrix of the plurality of matrix data divided by the dividing means. 3. An arithmetic means for multiplying function data inputted by means within a range of coordinates designated by said range designating means to obtain function data after each corresponding coordinate transformation. 4. The display device according to 3.