JP3972815B2 - Electronic device and program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device having a graph display function and a program.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an apparatus having a drawing function for drawing a geometric figure is known. For example, a scientific calculator (hereinafter referred to as “functional calculator”) having abundant functions such as a calculation function such as equation calculation, matrix calculation, and complex number calculation, a financial calculation function, and a statistical function is known. For example, the scientific calculator can display calculation results of various technical calculations using a calculation function in a graph and draw a figure of an inputted formula. Therefore, it is widely used for studying the relationship between character data such as mathematical formulas and graphs and figures in educational settings.
[0003]
Further, in the scientific calculator as described above, when displaying a graph, a function for setting a coordinate range for displaying the graph (hereinafter referred to as “display range”) to a value desired by the user is provided. Is known (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP-A-61-261780
[0005]
[Problems to be solved by the invention]
By the way, when a user calculates a function, it is not always performed with specific numerical values in mind. For example, assuming a mathematical expression including a variable (hereinafter referred to as “undefined variable”) a in which a specific numerical value is not specified other than the axis variables X and Y, such as “Y = aX ^ 2”, The calculation is based on the shape of the graph.
[0006]
However, in a device called a scientific calculator, when a mathematical expression using an undefined variable is input, the specific value of the undefined variable is unknown, so that an operation cannot be executed, resulting in an error. For example, this is the case.
[0007]
(1) When a coordinate range (display range) is set using an undefined variable
In a conventional scientific calculator, the coordinate range (display range) can be set when a graph is drawn. However, setting a coordinate range using an undefined variable resulted in an error.
(2) When entering a mathematical expression (graph expression) that includes undefined variables
Since the specific value of the undefined variable is unknown, an error occurred when numerical operation could not be performed, and the graph could not be drawn. Of course, a graph could not be drawn even by a method of specifying numerical conditions that can be taken by undefined variables. Moreover, since undefined variables are included, the values of undefined variables are not uniquely determined, and an increase / decrease table cannot be created.
(3) When creating list data by inputting table conditions including undefined variables
If you enter a formula and then enter a table condition for creating list data, even if the formula does not contain an undefined variable, if the table condition contains an undefined variable, the list data Could not be created.
[0008]
  Therefore, the present invention provides a graph drawing function even when an input using an undefined variable is made in an electronic device having a graph display function.PaintingThe purpose is to improve the usability by supporting the user's thought at the time of calculation.
[0009]
[Means for Solving the Problems]
  In order to solve the above-described problem, an electronic device according to claim 1 includes a coordinate range input unit for inputting a coordinate range for displaying a graph, and an undefined variable in the coordinate range input by the coordinate range input unit. A determination means for determining whether or not an undefined variable is included, and when the determination means determines that an undefined variable is included in the coordinate range, a temporary value is set for the undefined variable and set. Graph display control means for performing control to display a graph for the coordinate range into which the provisional value is substituted,On the graph displayed by the graph display control means, a trace pointer display control means for performing control to display a trace pointer that moves in accordance with the movement operation, and an undefined variable is included in the coordinate range by the determination means. A coordinate value display control means for performing control to calculate the position of the trace pointer in the coordinate range using the undefined variable and display it as a coordinate value when it is determined thatIt is characterized by providing.
[0010]
  Further, as in the invention according to claim 2, in the electronic device according to claim 1, a command input means for inputting a graph command for uniquely specifying a graph expression, and a graph input by the command input means A system command and a second discriminating unit that discriminates whether or not the same undefined variable is included in the coordinate range input by the coordinate range input unit, and the graph display control unit includes the command display unit A means for performing control to display a graph of a graph type specified by a graph-type command input by the input means, and when it is determined by the second determination means that the same undefined variable is included And determining whether or not the graph of the graph formula falls within the coordinate range into which the provisional value has been substituted based on a predetermined accommodation condition, May be configured to have a means for performing control to display a graph of the receiving condition is satisfied like the reset the temporary value expression the graph.
[0011]
  Further, as in the invention described in claim 3, in the electronic device described in claim 1 or 2, the scale value input means for inputting a scale value representing a value for one unit of the scale, and the scale value input means And a third determining means for determining whether or not an undefined variable is included in the scale value input by the step, and when it is determined by the third determining means that the scale value includes an undefined variable. A scale display control unit that performs control to set a temporary value to the undefined variable and display the scale with a scale value obtained by substituting the set temporary value may be provided.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the following, the case where the present invention is applied to a graph scientific calculator which is a kind of electronic apparatus having a graph display function will be described, but the present invention is not limited to this.
[0036]
FIG. 1 is a diagram showing an example of the appearance of a graph scientific calculator (hereinafter simply referred to as “functional calculator”) 1 to which the present invention is applied. According to the figure, the scientific calculator 1 includes a display 2, a key group 3, and an input pen 4. Each key constituting the key group 3 is assigned a unique function, and the user operates the scientific calculator 1 by pressing these keys. Further, a tablet (touch panel) 30 to be described later is integrally provided on the display 2, and the user can also operate the scientific calculator 1 by a touch operation on the display 2 using the input pen 4. .
[0037]
The scientific calculator 1 also includes, for example, a calculation application program (hereinafter referred to as “calculation application” as appropriate) for realizing a calculation function for calculating formulas, tables, lists, and the like, and a graph for realizing a graph drawing function. An application program (hereinafter referred to as “graph application” as appropriate) is installed.
Hereinafter, first to ninth embodiments of the scientific calculator 1 will be described with reference to the drawings.
[0038]
1. First embodiment
In the first embodiment, when an undefined variable is included in data input on a graph display range setting screen (hereinafter referred to as “display range setting window RW”) of a graph application, this undefined Assign a temporary value to the variable. Further, when an undefined variable is included in the graph expression input from the key group 3 or the like by the user, a temporary value is substituted for the undefined variable. Thereby, the display range of the graph display screen of the graph application (hereinafter referred to as “graph window GW”) is set, and the graph is drawn. Further, when a trace execution instruction is input, control is performed to display the trace pointer on the graph and display the coordinates of the trace position.
[0039]
1.1 Internal configuration
FIG. 2 is a block diagram illustrating an example of an internal configuration of the scientific calculator 1 according to the first embodiment. According to the figure, the scientific calculator 1 includes a CPU 10, an input unit 20, a tablet 30, a position detection circuit 31, a display unit 40, a display drive circuit 41, a RAM 50, a ROM 70, a storage device 90, and a storage medium 100. The
[0040]
The CPU 10 executes processing based on a predetermined program in accordance with an input instruction, performs an instruction to each function unit, data transfer, and the like, and controls the scientific calculator 1 in an integrated manner. Specifically, the CPU 10 reads a program stored in the ROM 70 in response to an operation signal input from the input unit 20 or the tablet 30, and executes processing according to the program. Then, the processing result is stored in the RAM 50, and a display signal for displaying the processing result is appropriately output to the display drive circuit 41 to display the corresponding display information on the display unit 40.
[0041]
The input unit 20 is an input device having keys necessary for inputting numerical values and mathematical formulas, selecting functions, and the like, and outputs a pressed signal of a pressed key to the CPU 10. By key input in the input unit 20, for example, instructions for starting various applications, execution of graphic drawing processing, input of mathematical expressions, execution of arithmetic processing, termination of processing and cancellation of modes, pointer operations, various selection operations, and the selection operations An input means such as a confirmation instruction is realized. The input unit 20 corresponds to the key group 3 shown in FIG.
[0042]
The scientific calculator 1 includes a tablet 30 that is a touch panel as an input device. The tablet 30 is an input device in which a device such as an instruction pen (corresponding to the input pen 4 shown in FIG. 1) that indicates a position on the display unit 40 and a device that detects the position of the specified display unit 40 are combined. It is. A position detection circuit 31 connected to the tablet 30 detects position coordinates designated by the tablet 30. If this tablet 30 is used, the position in the display part 40 can be specified finely, and the input means in the input part 20 mentioned above by the touch operation of the display part 40 using the tablet 30 is realizable.
[0043]
The display drive circuit 41 controls the display unit 40 based on a display signal input from the CPU 10 to display various screens. The display unit 40 includes an LCD (Liquid Crystal Display), an ELD (Electro Luminescent Display), or the like, and displays, for example, a display screen shown in FIG. The display unit 40 corresponds to the display 2 in FIG. 1 and is formed integrally with the tablet 30.
[0044]
The RAM 50 includes a storage area (memory) that temporarily stores various processing programs executed by the CPU 10 and data related to the execution of these programs. FIG. 3 is a diagram showing a configuration of the RAM 50 in the present embodiment.
[0045]
According to the figure, the RAM 50 displays the undefined variable when the display range setting data 51 for specifying the display range input in the display range setting window RW and the display range setting data 51 includes an undefined variable. Display range temporary substitution value data 51a which is a value calculated as a value to be substituted, graph data 52 which is dot data of a graph drawn in the graph window GW, and data of a graph formula for drawing a graph (graph formula Data) 52a, graph formula temporary substitution value data 52b, which is a value calculated as a value that is temporarily substituted for this undefined variable when the graph formula data 52a includes an undefined variable, and coordinate data of the trace position on the graph The coordinate value data 53 is an area for storing each data.
[0046]
FIG. 4 is a diagram illustrating the configuration of the ROM 70. According to the figure, the ROM 70 stores initial programs for performing various initial settings, hardware inspections, and loading necessary programs. The CPU 10 sets the operating environment of the scientific calculator 1 by executing this initial program when the scientific calculator 1 is powered on.
[0047]
The ROM 70 also implements various application programs such as a calculation application and a graph application, various processing programs related to the operation of the scientific calculator 1 such as various setting processes and various arithmetic processes, and various functions provided in the scientific calculator 1. Stores programs and data. In particular, in the present embodiment, a first graph drawing processing program 71 is stored.
[0048]
The first graph drawing processing program 71 is a program for realizing the first graph drawing processing (see FIG. 5). When the CPU 10 executes the first graph drawing processing program 71, the first graph drawing processing is realized.
[0049]
The storage device 90 includes a storage medium 100 that stores programs, data, and the like. The storage medium 100 includes a magnetic or optical storage medium or a semiconductor memory. The storage device 90 is fixedly attached or detachably mounted. The storage medium 100 stores various processing programs corresponding to the scientific calculator 1, data processed based on the various processing programs, and the like. Is stored.
[0050]
Note that the program, data, and the like stored in the storage medium 100 may be received and stored from another device connected via a communication line (not shown). In addition, the storage medium 100 and the storage device 90 may be used by transferring programs and data from other devices via a communication line.
[0051]
1.2 Operation
Next, the operation of the scientific calculator 1 in the first embodiment will be described.
FIG. 5 is a flowchart for explaining the operation of the scientific calculator 1 related to the first graph drawing process, and FIG. 6 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0052]
In the first graph drawing process shown in FIG. 5, first, the CPU 10 switches the graph mode from OFF to ON (step S <b> 101), and then starts execution of the graph application to display the display range setting window RW on the display unit 40. (Step S102). Then, the user inputs, for example, a numerical value or an undefined variable for setting the display range of the graph at the cursor position of the display range setting window RW using the key group 3. Then, the CPU 10 detects that data specifying the display range has been input (step S103; YES), and stores the input data in the RAM 50 as the display range setting data 51 (step S104).
[0053]
6A and 6B are diagrams showing an example of a display screen displayed on the display unit 40 at this stage. In the display range setting window RW shown in FIG. 6A, the user selects the minimum value “Xmin” of the X coordinate, the maximum value “Xmax” of the X coordinate, the minimum value “Ymin” of the Y coordinate, and the maximum value “Y” of the Y coordinate. Each value of “Ymax” is set. FIG. 6B shows an example in which the user sets undefined variables for these values. In FIG. 6B, each value of the display range is indicated by characters (undefined variables) such as “Xmin: −A”, “Xmax: A”, “Ymin: −B”, and “Ymax: B”. It is specified.
[0054]
Next, when the CPU 10 determines that the display range setting data 51 includes an undefined variable (step S105; YES), the CPU 10 calculates a value to be temporarily substituted for the undefined variable, and the calculated value is temporarily substituted for the display range. The value data 51a is stored in the RAM 50 (step S106). On the other hand, if the CPU 10 determines that the undefined variable is not included in the display range setting data 51 (step S105; NO), the CPU 10 proceeds to step S107.
[0055]
Here, the value that is temporarily assigned to the undefined variable in step S <b> 106 may be calculated based on, for example, the value of the display range when the graph window GW was previously displayed on the display unit 40. A value may be stored in advance and calculated based on this value.
[0056]
Next, when a graph expression and a graph drawing instruction are input by the user from the key group 3 or the like, the CPU 10 detects the input (step S107; YES), and the input graph expression includes an undefined variable. Is determined (step S108). If the CPU 10 determines that an undefined variable is included in the graph expression (step S108; YES), the CPU 10 calculates the value of the undefined variable to be temporarily assigned to the graph expression, and uses the calculated value as the graph expression temporary assignment value data 52b. Is stored in the RAM 50 (step S109).
[0057]
Here, as a value to be assigned to the undefined variable in step S109, for example, when the graph expression is a quadratic function or a cubic function, the singular points such as the maximum value and the minimum value of the function are the steps S104 to S104. A value that falls within the display range set in S106 may be calculated and used. In the case of a linear function, default y-intercept and x-intercept data may be stored in the ROM 70 in advance, and a value that the graph passes through this intercept may be calculated and used.
[0058]
Subsequently, the CPU 10 calculates graph type graph data (step S110), and stores the graph data 52 and the graph type data 52a in the RAM 50 (step S111). Next, the CPU 10 displays the graph window GW on the display unit 40 based on the display range setting data 51, and draws the graph (step S112).
[0059]
FIG. 6C is a diagram showing an example of the display screen at this stage. According to the figure, a graph window GW is displayed on the display unit 40, and the display range of the graph window GW is set according to the setting input by the user at the stage shown in FIG. 6B. That is, the display range of “−A” to “A” in the X-axis direction and “−B” to “B” in the Y-axis direction is displayed in the graph window GW, and the graph G1 is displayed therein. .
[0060]
Next, the CPU 10 determines whether or not a trace button TRB provided in the graph window GW has been selected and a trace execution instruction has been input (step S113). If the CPU 10 determines that no trace instruction is input (step S113; NO), the first graph drawing process ends. On the other hand, if the CPU 10 determines that a trace instruction has been input (step S113; YES), the CPU 10 performs the following processing.
[0061]
The CPU 10 determines the movement destination of the trace pointer based on each value stored in the display range temporary substitution value data 51a, the graph type data 52a, the graph type temporary substitution value data 52b, and the relative position of the trace pointer with respect to the display screen. The position coordinates are calculated (step S114). At this time, when the display range setting data 51 and the graph data 52 include an undefined variable, the CPU 10 assigns a certain value to the undefined variable. Therefore, a calculation for returning the coordinate value determined by this value to the undefined variable is performed, and the coordinate position of the movement destination of the trace pointer is calculated as a coordinate value including the undefined variable.
[0062]
Next, the CPU 10 stores the calculated position of the movement destination of the trace pointer in the RAM 50 as the coordinate value data 53 (step S115). Further, the trace pointer H1 is displayed at the trace position on the graph (step S116), and the coordinates of the trace position are displayed in the graph window GW (step S117).
[0063]
FIG. 6D is a diagram illustrating an example of the display screen of the display unit 40 at this stage. According to the figure, the graph of the formula C1 “Y2 = 1nX” is drawn in the graph window GW, and the coordinate value “X = A / 5, Y = Ln (A / 5)” of the position of the trace pointer H1. Is displayed. In the example shown in FIG. 6, since the display range setting data 51 includes undefined variables (A, B), the coordinate values shown at the time of tracing are expressed including the undefined variables.
[0064]
And CPU10 repeats the process of step S114-S117 until the movement operation of the trace pointer by a user is complete | finished (step S118; YES), and when a movement operation is complete | finished (step S118; NO), a 1st graph drawing process Exit.
[0065]
As described above, in the first embodiment, when the user designates an undefined variable or numerical value as data for setting a display range or a graph expression, a graph is drawn in the graph window GW. Even if an undefined variable is specified, the coordinate value of the trace position at the time of the trace processing is displayed using the undefined variable.
[0066]
For this reason, even when specific numerical values to be substituted into the display range or the graph formula are not determined, the graph shape can be visually confirmed in the graph window GW, and the graph can be easily imaged.
[0067]
2. Second embodiment
Hereinafter, a second embodiment will be described.
In the second embodiment, when an undefined variable is included in the display range setting data, a temporary value is substituted for the undefined variable. In addition, after the display range is set by substituting a temporary value, if the graph to be drawn cannot be displayed within the display range, the value temporarily assigned to the display range setting data is changed. Thus, control for displaying the graph within the display range is performed.
[0068]
2.1 Internal configuration
The scientific calculator 1 in the second embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 250 and the ROM 70 is replaced with the ROM 270. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0069]
FIG. 7 is a diagram illustrating the configuration of the RAM 250. According to the figure, the RAM 250 displays the display range provisional substitution that is a value that is calculated as a value that is provisionally substituted for the undefined variable when the display range setting data 51 and the display range setting data 51 include an undefined variable. Value data 51a, graph data 52, graph formula data for drawing a graph (graph formula data) 52a, and a graph application screen for inputting a graph drawing command (hereinafter referred to as “command data CW”). Storage area for each data of command temporary substitution value data 54a that is a value calculated as a value that is temporarily substituted for the undefined variable when the command data 54 and the command data 54 include an undefined variable. .
[0070]
FIG. 8 is a diagram showing the configuration of the ROM 270. According to the figure, the ROM 270 stores a second graph drawing processing program 271.
[0071]
The second graph drawing processing program 271 is a program for realizing the second graph drawing processing (see FIG. 9). When the CPU 10 executes the second graph drawing processing program 271, the second graph drawing processing is realized.
[0072]
2.2 Operation
Next, the operation of the scientific calculator 1 in the second embodiment will be described.
FIG. 9 is a flowchart for explaining the operation of the scientific calculator 1 related to the second graph drawing process. FIG. 10 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0073]
In the second graph drawing process shown in FIG. 9, first, the CPU 10 switches the graph mode from OFF to ON (step S201), and then starts execution of the graph application to display the display range setting window RW on the display unit 40. (Step S202). Then, the user inputs a numerical value or an undefined variable for setting the display range of the graph at the cursor position of the display range setting window RW using, for example, the key group 3. Then, the CPU 10 detects that data specifying the display range has been input (step S203; YES), and stores the input data in the RAM 250 as the display range setting data 51 (step S204).
[0074]
FIG. 10A is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. In the display range setting window RW shown in FIG. 10A, the user selects the minimum value “Xmin” of the X coordinate, the maximum value “Xmax” of the X coordinate, the minimum value “Ymin” of the Y coordinate, and the maximum value “Y” of the Y coordinate. Each value of “Ymax” is set. When the user sets undefined variables in these values, for example, characters such as “Xmin: −A”, “Xmax: A”, “Ymin: −B”, “Ymax: B” are illustrated as shown in the figure. The value is specified by (undefined variable).
[0075]
Next, when the CPU 10 determines that the display range setting data 51 includes an undefined variable (step S205; YES), the CPU 10 calculates a value to be temporarily substituted for the undefined variable, and the calculated value is temporarily substituted for the display range. The value data 51a is stored in the RAM 250 (step S206). On the other hand, when the CPU 10 determines that the undefined variable is not included in the display range setting data 51 (step S205; NO), the CPU 10 proceeds to step S207.
[0076]
Here, as the value that is temporarily substituted into the undefined variable in step S206, for example, it may be calculated and used based on the value of the display range when the previous graph window GW was displayed on the display unit 40, A default value may be stored in advance in the ROM 270 or the like, and a value calculated based on this value may be used.
[0077]
Next, the CPU 10 displays a command window CW on the display unit 40 (step S207). The user inputs command data for drawing a graph from the key group 3 or the like. Then, the CPU 10 detects that command data has been input (step S208; YES), and stores the command data 54 in the RAM 250 (step S209).
[0078]
FIG. 10B is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, a command for drawing a straight line from coordinates (A, 5) to coordinates (-B, B) is input in the command window CW.
[0079]
Next, the CPU 10 determines whether or not an undefined variable identical to the undefined variable used for setting the display range setting data is included in the command data 54 (step S210). When determining that the same undefined variable is included in the command data 54 (step S210; YES), the CPU 10 determines whether or not the display range temporary substitution value data 51a is inappropriate for the command data 54. (Step S211). When the CPU 10 determines that the display range temporary substitution value data 51a is inappropriate (step S211; YES), the CPU 10 recalculates and updates the display range temporary substitution value data 51a (step S212).
[0080]
Here, in step S211, a method for determining whether or not the display range temporary substitution value data 51a is inappropriate will be described in detail. For example, it is assumed that the display range in the X-axis direction is set to “−A to A” in step S204, and that a point is designated to be drawn at the position of the X coordinate “3” in step S209. At this time, if the display range temporary substitution value data 51a provisionally substituted for “A” is “0” or more and less than “3”, the designated point is drawn within the display range set in the display unit 40. Can not do it. Thus, when the graph instructed to be drawn by the command data 54 cannot be drawn within the display range, it is determined that the graph is inappropriate.
[0081]
Next, the CPU 10 determines whether or not other undefined variables (other than undefined variables included in the display range setting data 51) are included in the command data 54 (step S213). When the CPU 10 determines that the command data 54 includes other undefined variables (step S213; YES), the CPU 10 calculates a value to be temporarily substituted for the undefined variable and uses the calculated value as the command temporary substitution value data 54a. Is stored in the RAM 250 (step S215).
[0082]
In step S 215, a value that allows a graph based on the command data 54 to be displayed in the display range set by the display range setting data 51 is set as the command temporary substitution value. For example, when the graph instructed to be drawn by the command data 54 is a quadratic function or a cubic function, singular points such as the maximum value and the minimum value of the function fall within the display range set in steps S204 to S206. Such a value may be calculated and used. In the case of a linear function, default y-intercept and x-intercept data may be stored in the ROM 270 in advance, and a value that allows the graph to pass through this intercept may be calculated and used.
[0083]
Next, the CPU 10 calculates the graph data 52 of the graph instructed to be drawn by the command data 54, and stores the graph data 52 and the graph formula data 52a in the RAM 250 (step S215). Then, the graph window GW is displayed on the display unit 40 based on the display range setting data 51, and a graph is drawn (step S216).
[0084]
FIG. 10C is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, in the graph window GW, the drawing is instructed by a command for drawing a straight line from the coordinates (A, 5) to the coordinates (−B, B) input in the command window CW of FIG. A graph G2 is displayed within the display range.
When the above processing is executed, the CPU 10 ends the second graph drawing processing.
[0085]
As described above, in the second embodiment, even when the user specifies an undefined variable in the display range setting data or the command data 54, a desired graph is displayed in the graph window GW. In addition, the value temporarily assigned to the undefined variable in the display range is automatically changed according to the command data 54, and the graph is automatically adjusted and displayed so as to fit within the display screen.
[0086]
Therefore, even when an undefined variable or a numerical value is specified in the graph display range or the command data 54, the graph can be displayed and drawn on the scientific calculator 1. For this reason, when a specific numerical value to be substituted for the display range or the command data 54 is not determined, the graph instructed to draw by the command data 54 is surely displayed within the display range, which is convenient.
[0087]
3. Third embodiment
The third embodiment will be described below.
In the third embodiment, when an undefined variable is included in the scale value data input in the display range setting window RW, a temporary value (hereinafter referred to as “scale value temporary substitution value data”) is included in the undefined variable. "). If the display range setting data includes an undefined variable, a temporary value (hereinafter referred to as “display range temporary substitution value data”) is substituted for the undefined variable to display the graph window GW. Display control is performed, and at that time, the following processing is performed. Based on the display range temporary substitution value data, the scale value temporary substitution value data, and the data of the default scale number of a predetermined scale, control is performed to display a predetermined number of scales in the display range of the display unit. is there.
[0088]
3.1 Internal configuration
The configuration of the scientific calculator 1 in the third embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 350, and the ROM 70 is replaced with the ROM 370. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0089]
FIG. 11 is a diagram illustrating the configuration of the RAM 350. According to the figure, the RAM 350 displays a display value that is temporarily assigned to the undefined variable when the display range setting data 51 and the value that sets the display range of the display range setting data 51 include an undefined variable. When an undefined variable is included in the value for setting the scale value of the range temporary substitution value data 51a and the display range setting data 51, the scale value temporary substitution value data 51b, which is a value temporarily substituted for the undefined variable, a graph Storage areas for data 52 and graph data 52a for drawing a graph are provided.
[0090]
FIG. 12 is a diagram illustrating the configuration of the ROM 370. As shown in the drawing, the ROM 370 stores a scale display processing program 371 and default scale number data (hereinafter referred to as “scale number default data”) 372.
[0091]
The scale display processing program 371 is a program for realizing scale display processing (see FIG. 13). When the CPU 10 executes the scale display processing program 371, the scale display processing is realized.
[0092]
The scale number default data 372 is a value set in advance as the number of scale marks to be displayed in the graph window GW when the display range setting data 51 includes an undefined variable. The scale number default data 372 may be set as appropriate by the user.
[0093]
3.2 Operation
Next, the operation of the scientific calculator 1 in the third embodiment will be described.
FIG. 13 is a flowchart for explaining the operation of the scientific calculator 1 related to the scale display processing, and FIG. 14 is a diagram showing a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. It is.
[0094]
First, the scale value will be described with reference to FIG. FIG. 14A is a diagram showing an example in which a scale and a graph G3 are displayed in the graph window GW. As shown in the figure, in the graph window GW, scales are added on the X axis and the Y axis at regular intervals. The width of the value for one scale is called a scale value.
[0095]
In the scale display processing shown in FIG. 13, first, the CPU 10 switches the graph mode from OFF to ON (step S301), and then starts execution of the graph application and causes the display unit 40 to display the display range setting window RW (step S301). S302). Then, the user moves the cursor displayed on the display range setting window RW using, for example, the key group 3, selects the graph display range and the scale value input field, and inputs a numerical value or an undefined variable. Then, the CPU 10 detects that data specifying the display range and the scale value has been input (step S303; YES), and stores the input data in the RAM 370 as the display range setting data 51 (step S304).
[0096]
FIG. 14B is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. In the display range setting window RW shown in the figure, the user uses the X coordinate minimum value “Xmin”, the X coordinate maximum value “Xmax”, the Y coordinate minimum value “Ymin”, and the Y coordinate maximum value “Ymax”. Data for setting a display range to be determined and data of a scale value determined by “scale” are set. The user sets undefined variables or numerical values to these values, for example. According to the figure, the set values are “Xmin: −A”, “Xmax: A”, “Ymin: −3.1”, and “Ymax: 3.1”.
[0097]
Next, when the CPU 10 determines that the display range setting data 51 includes an undefined variable (step S305; YES), the CPU 10 proceeds to step S306.
[0098]
In step S <b> 306, the CPU 10 first reads scale number default data 372 stored in advance in the ROM 370. Then, the values of the display range temporary substitution value data 51a and the scale value temporary substitution value data 51b are calculated so that the number of scales indicated by the scale number default data 372 is displayed within the display range of the graph window GW.
[0099]
Specifically, for example, the scale number “10” is displayed in the X-axis direction of the display range, and the display range setting data 51 is “Xmax: A”, “Xmin: −A”, “Ymax: 5 ”,“ Ymin: −5 ”, and when the scale value“ scale: B ”is set, the CPU 10 determines the number of scales over the value of the width in the X-axis direction displayed in the display range, that is, 2A. Control to display “10”. Accordingly, the width of one scale, that is, the value of the scale B is “2A / 10” (“A / 5”). Therefore, when “20” is temporarily assigned to the undefined variable A, the value temporarily assigned to the undefined variable B is automatically “A / 5 = 4”.
Thus, the CPU 10 determines the display range temporary substitution value data 51a and the scale value temporary substitution value data 51b based on the scale number default data 372.
[0100]
The scale number default data 372 may store data of different scale numbers for the X-axis direction and the Y-axis direction of the graph window GW, or the same data.
[0101]
Next, the CPU 10 stores the display range temporary substitution value data 51 a and the scale value temporary substitution value data 51 b calculated in step S 306 in the RAM 350 (step S 307), and the CPU 10 based on the display range setting data 51. The graph window GW is displayed, and the scale is displayed on the screen (step S308).
[0102]
FIG. 14C is a diagram showing an example of a display screen on the display unit 40 at this stage. According to the figure, scales are displayed on the X-axis and the Y-axis in the graph window GW.
When the above processing is executed, the CPU 10 ends the scale display processing.
[0103]
As described above, in the third embodiment, even when the user designates an undefined variable for the display range or scale value of the graph window GW, error processing is not executed by the scientific calculator 1, A scale is displayed in the graph window GW.
[0104]
Therefore, since the scale is displayed in the graph window GW regardless of whether the scale value of the display range is a specific numerical value or an undefined variable, the user can efficiently learn using the graph. .
[0105]
4). Fourth embodiment
Hereinafter, a fourth embodiment will be described.
In the fourth embodiment, a formula window FW that displays a formula, a graph window GW that displays a graph, and a formula display field WW that displays a graph formula of a graph selected by the user are displayed on the display unit 40. When a graph expression including an undefined variable is input, a graph is drawn in the graph window GW by substituting a temporary value for the undefined variable. Further, when arbitrary coordinates on the graph window GW are designated by the user, the graph drawing position is changed according to the designated coordinates, and the value temporarily assigned to the undefined variable is changed. is there.
[0106]
4.1 Internal configuration
The configuration of the scientific calculator 1 in the fourth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 450, and the ROM 70 is replaced with the ROM 470. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0107]
FIG. 15 is a diagram illustrating a configuration of the RAM 450. According to the figure, the RAM 450 displays the graph data 52, which is display data in the graph window GW, the graph formula data 52a for drawing the graph, and the graph formula data 52a when the undefined variable is included in the graph formula data 52a. Storage of each data of graph type temporary substitution value data 52b which is a value calculated as a value to be substituted, formula data 55 which is display data in the formula window FW, and figure specifying data 60 for specifying a figure to be drawn Provide an area.
[0108]
FIG. 16 is a diagram showing the configuration of the ROM 470. According to the figure, the ROM 470 stores a graph display position designation processing program 471.
[0109]
The graph display position designation processing program 471 is a program for realizing a graph display position designation process (see FIG. 17). When the CPU 10 executes the graph display position designation processing program 471, the graph display position designation process is realized.
[0110]
4.2 Operation
Next, the operation of the scientific calculator 1 in the fourth embodiment will be described.
FIG. 17 is a flowchart for explaining the operation of the scientific calculator 1 related to the graph display position designation process, and FIG. 18 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0111]
In the graph display position designation process shown in FIG. 17, the user designates a desired figure type using the key group 3 or the input pen 4 and specifies numerical values and characters (data for specifying the figure). (Undefined variable) etc. (hereinafter referred to as “graphic specific data”). Then, the CPU 10 detects the type of figure to be drawn (step S401), detects the input of figure specifying data (step S402), and stores it in the RAM 450 as the figure specifying data 60 (step S404).
[0112]
Next, when the CPU 10 determines that an undefined variable is included in the graphic identification data 60 (step S405; YES), the CPU 10 calculates a value to be temporarily assigned to the undefined variable, and uses the calculated value as a graph-type temporary substitution value. The data 52b is stored in the RAM 450 (step S406).
[0113]
Next, the CPU 10 calculates graph data of a graphic to be drawn, and stores the graph data 52 and the graph formula data 52a in the RAM 450 (step S407). Next, the CPU 10 sends the graph data 52 to the display unit 40 and draws the graph on the graph window GW (step S408).
[0114]
FIGS. 18A and 18B are diagrams illustrating an example of a display screen on the display unit 40 at this stage. FIG. 18A is a screen example in which the graph formula C4 is displayed in the formula window FW and the graph G4 based on the graph formula C4 is already drawn in the graph window GW. In the graph window GW, the user uses the input pen 4 to specify graphic specifying data for specifying the center and radius of the circle and input a circle drawing command. Thereby, for example, the graph expression “(x−A) ^ 2 + (y−B) ^ 2 = 4” including the undefined variables “A” and “B” is designated and stored in the RAM 450 as the graph expression data 52a. Is done.
[0115]
The CPU 10 draws the graph G5 shown in FIG. 18A according to the command and displays the pointer H10 at the center of the graph G5. In FIG. 18B, the user moves the pointer H10 of the graph G5 using the input pen 4, and inputs a command for changing the display position of the graph G5. In response to this, the CPU 10 executes the processing after step S410 described below.
[0116]
Next, when the CPU 10 detects that the coordinates on the graph are designated (step S409; YES), the CPU 10 re-uses the value of the graph-type provisional substitution value data 52b that is provisionally substituted from the designated position (coordinates) to the undefined variable. The graph formula data 52a and the graph formula temporary substitution value data 52b are updated by calculation (step S410). Further, after recalculating the graph data (step S411), the CPU 10 changes the display position of the graph (step S412). And a graph type | formula is displayed on the formula display column WW of the display part 40 (step S413).
[0117]
18C and 18D are diagrams showing an example of the display screen of the display unit 40 at this stage. As shown in FIG. 18C, when the user designates the coordinates by moving the center H10 of the graph G5 using the input pen 4, the CPU 10 changes the display position of the graph G5. After that, as shown in FIG. 18D, the graph expression of the moved graph G5 is displayed in the expression display field WW. In the formula display field WW, a graph formula C5 of the graph G5 including the undefined variables A and B is displayed.
[0118]
In addition, when a specific numerical value is set in the display range of the graph window GW, an accurate position of the graph G5 can be calculated, and therefore, as shown in FIG. 19 instead of the screen of FIG. In this way, the graph expression C5 ′ into which specific numerical values are substituted may be displayed in the expression display field WW.
[0119]
As described above, in the fourth embodiment, when the user inputs a mathematical expression including an undefined variable, a graph is drawn on the display unit 40 without performing error processing by the scientific calculator 1. Further, when an instruction to change the position of the graph is input after drawing the graph, the drawing position of the graph is changed.
[0120]
Therefore, it is possible to draw a graph based on a mathematical formula including an undefined variable and change the display position of the graph based on the coordinate position specified by the user. Therefore, the graph can be drawn at a desired position imaged by the user.
[0121]
5). Fifth embodiment
The fifth embodiment will be described below.
In the fifth embodiment, a graph based on the mathematical formula input to the mathematical formula window FW is drawn in the graph window GW. When the condition of the undefined variable included in the mathematical expression input to the mathematical formula window FW is input to the condition data input field IA, the position of the graph drawn in the graph window GW is changed according to this condition. Control is performed.
[0122]
5.1 Internal configuration
The configuration of the scientific calculator 1 in the fifth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 550, and the ROM 70 is replaced with the ROM 570. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0123]
FIG. 20 is a diagram showing the configuration of the RAM 550. According to the figure, the RAM 550 displays the undefined variable when the graph data 52 that is the display data in the graph window GW, the graph formula data 52a for drawing the graph, and the graph formula data 52a include an undefined variable. Graph type provisional substitution value data 52b which is a value calculated as a value to be temporarily substituted into the formula data 55, which is display data in the formula window FW, and condition data 56 which is display data in the condition data input field IA. A storage area is provided.
[0124]
FIG. 21 is a diagram showing the configuration of the ROM 570. According to the figure, the ROM 570 stores a condition setting graph drawing processing program 571.
[0125]
The condition setting graph drawing processing program 571 is a program for realizing the condition setting graph drawing processing (see FIG. 22). When the CPU 10 executes the condition setting graph drawing processing program 571, the condition setting graph drawing processing is realized.
[0126]
5.2 Operation
Next, the operation of the scientific calculator 1 in the fifth embodiment will be described.
FIG. 22 is a flowchart for explaining the operation of the scientific calculator 1 related to the condition setting graph drawing process. FIG. 23 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0127]
In the condition setting graph drawing process shown in FIG. 22, first, the CPU 10 switches the graph mode from OFF to ON (step S501). Next, execution of the calculation application and the graph application is started, and the mathematical expression window FW, the graph window GW, and the condition data input field IA are displayed on the display unit 40 (step S502). Then, for example, the user inputs a mathematical formula including an undefined variable in the mathematical formula window FW using the key group 3 and inputs a graph drawing command.
[0128]
When the CPU 10 determines that a mathematical expression including an undefined variable is input to the mathematical formula window FW and a drawing command is designated (step S503; YES), the CPU 10 stores the input graph formula in the RAM 550 as mathematical formula data 55 (step S504). ).
[0129]
Next, the CPU 10 calculates a value to be temporarily substituted into an undefined variable in the formula so that the graph based on the formula inputted by the user fits in the display area of the graph window GW, and as the graph formula temporary substitution value data 52b. The data is stored in the RAM 550 (step S505). CPU10 calculates graph data from the numerical formula which substituted the temporary substitution value, and stores the graph data 52 and the graph formula data 52a in RAM550 (step S506). Next, the CPU 10 draws a graph in the graph window GW (step S507).
[0130]
FIGS. 23A and 23B are diagrams showing an example of transition of the display screen displayed on the display unit 40 at this stage. In the example shown in FIG. 23A, the formula C6 “Y = X + A” is displayed in the formula window FW, and the graph formula G6 of the formula C6 is displayed in the graph window GW. Further, in the example shown in FIG. 23B, the formula C7 “Y = X + B” is added to the formula window FW, and the graph G7 of the formula C7 is displayed in the graph window GW accordingly.
[0131]
Subsequently, when the condition of the undefined variable included in the formula displayed in the formula window FW is input in the condition data input field IA (step S509; YES), the CPU 10 sets the input condition as the condition data 56. The data is stored in the RAM 550 (step S510).
[0132]
Next, the CPU 10 determines whether or not the value temporarily assigned to the undefined variable in the mathematical expression in step S505 matches the condition of the condition data 56 (whether the condition is satisfied) (step S511). If the CPU 10 determines that the graph-type temporary substitution value data 52b matches the condition data 56 (step S511; YES), the condition setting graph drawing process ends.
[0133]
On the other hand, if the graph formula temporary substitution value data 52b does not match the condition data 56 (step S511; NO), the CPU 10 recalculates the graph formula temporary substitution value data 51b so as to satisfy the condition indicated by the condition data 56. Then, the graph type temporary substitution value data 51b is updated (step S512). Next, the CPU 10 calculates the graph data of the formula data 51 into which the updated graph formula temporary substitution value data 51b is substituted, and updates the graph data 52 and the graph formula data 52a (step S513). Then, the CPU 10 updates the graph drawing position in the graph window GW (step S514).
[0134]
FIGS. 23C and 23D are diagrams showing a transition example of the display screen displayed on the display unit 40 at this stage. According to FIG. 23C, the condition J1 “A> B> 0” is input by the user in the condition data input field IA. When the condition J1 is input, the CPU 10 changes the drawing positions of the graphs G6 and G7 according to the condition. In this screen example, the values of the y-intercepts of the mathematical formulas C6 and C7 indicating the straight line are positive, and the condition that A is larger than B is specified. Therefore, as shown in FIG. The arrangement of is changed.
When the above processing is executed, the CPU 10 ends the condition setting graph drawing processing.
[0135]
As described above, in the fifth embodiment, when a user designates a mathematical expression including an undefined variable and instructs to draw a graph based on this mathematical expression, the graph is drawn on the display unit 40 of the scientific calculator 1. The In addition, if you enter a condition that indicates the magnitude relationship of undefined variables included in each formula, the graph will be changed according to the condition such as the display position will be changed if the drawn graph does not satisfy the condition. Is made.
[0136]
Therefore, it is possible not only to display a graph based on a mathematical expression including an undefined variable, but also to display a graph at a position as imaged by specifying a condition.
[0137]
6). Sixth embodiment
Hereinafter, a sixth embodiment will be described.
In the sixth embodiment, a graph based on the mathematical formula input to the mathematical formula window FW is drawn in the graph window GW. In addition, when data indicating the condition of the undefined variable included in the formula input in the formula window FW is input to the condition data input field IA, all values satisfying this condition are substituted into the undefined variable of the formula. . And all the data obtained by this are drawn on the graph window GW, and the control which draws the graph which has predetermined | prescribed line | wire width is performed.
[0138]
6.1 Internal configuration
The configuration of the scientific calculator 1 in the sixth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 650, and the ROM 70 is replaced with the ROM 670. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0139]
FIG. 24 is a diagram showing the configuration of the RAM 650. According to the figure, the RAM 650 temporarily substitutes the undefined variable when the graph data 52 which is the display data in the graph window GW, the graph formula data 52a for drawing the graph, and the graph formula includes the undefined variable. Storage area of each data of graph type temporary substitution value data 52b which is a value calculated as a calculated value, formula data 55 which is display data in the formula window FW, and condition data 56 which is display data in the condition data input field IA Is provided.
[0140]
FIG. 25 is a diagram showing the configuration of the ROM 670. According to the figure, the ROM 670 stores a condition satisfaction graph full drawing processing program 671.
[0141]
The condition satisfaction graph all drawing processing program 671 is a program for realizing the condition satisfaction graph all drawing processing (see FIG. 26). When the CPU 10 executes the condition satisfaction graph all drawing processing program 671, the condition satisfaction graph all drawing processing is realized.
[0142]
6.2 Operation
Next, the operation of the scientific calculator 1 in the sixth embodiment will be described.
FIG. 26 is a flowchart for explaining the operation of the scientific calculator 1 related to the condition satisfaction graph all drawing process, and FIG. 27 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0143]
In the condition satisfaction graph all drawing process shown in FIG. 26, first, the CPU 10 switches the graph mode from OFF to ON (step S601). Next, the execution of the calculation application and the graph application is started, and the mathematical expression window FW, the graph window GW, and the condition data input field IA are displayed on the display unit 40 (step S602). Then, for example, the user inputs a mathematical formula including an undefined variable in the mathematical formula window FW using the key group 3 and inputs a graph drawing command.
[0144]
When a mathematical expression including an undefined variable is input in the condition data input field IA (step S603; YES), the CPU 10 stores the input mathematical expression in the RAM 650 as mathematical expression data 55 (step S604). Next, the CPU 10 calculates a value to be temporarily substituted into an undefined variable included in the formula so that the graph based on the formula falls within the display range of the graph window GW, and the calculated value is a graph formula temporary substitution value. The data is stored in the RAM 650 (step S605).
[0145]
Subsequently, the CPU 10 calculates graph data from the mathematical formula substituted with the provisional substitution value, and stores the graph data 52 and the graph formula data 52a in the RAM 650 (step S606). Next, the CPU 10 draws a graph in the graph window GW (step S607).
[0146]
FIG. 27A is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, the formula C8 “Y = X + A” is displayed in the formula window FW, and the graph G8 of the formula C8 is displayed in the graph window GW.
[0147]
Next, when the condition designating the range of the undefined variable included in the formula displayed in the formula window FW is input in the condition data input field IA (step S609: YES), the CPU 10 sets the input condition as the condition. The data 56 is stored in the RAM 650 (step S610).
[0148]
Next, the CPU 10 sets all values satisfying the condition data 56 in the graph-type temporary substitution value data 52b, and substitutes the graph-type temporary substitution value data 52b into the formula data 55 to calculate all graph data. The graph data 52 and the graph formula data 52a are updated (step S611). Then, the CPU 10 draws a graph on the graph window GW based on the entire graph data calculated in step S611 (step S612).
[0149]
FIGS. 27B and 27C are diagrams showing a transition example of the display screen displayed on the display unit 40 at this stage. In FIG. 27B, the condition J2 “2> A> −1” is entered in the condition data input field IA. The CPU 10 substitutes the numerical value in the range specified by the condition J2 for the undefined variable A of the mathematical formula C8 “Y = X + A” displayed in the mathematical formula window FW, and as shown in FIG. (Graph from “Y = X + 2” to “Y = X−1”) is displayed in the graph window GW.
When the above processing is executed, the CPU 10 ends the condition satisfaction graph all drawing processing.
[0150]
As described above, in the sixth embodiment, when a user specifies a mathematical expression including an undefined variable and inputs a graph drawing command, a graph based on the mathematical expression is displayed on the display unit 40. When a condition for designating a range of values to be assigned to undefined variables is input, all graphs satisfying this condition are displayed in the graph window GW.
[0151]
Therefore, it is possible not only to display a graph by specifying a mathematical expression including an undefined variable, but also to input a range of undefined variable values as a condition after the graph is drawn. All the graphs that satisfy (having a predetermined width) can be displayed.
[0152]
For example, when “A> −1” is input R as the condition in FIG. 27B, an area where the y-intercept of Expression C8 is larger than “−1” is filled (with an infinite width). The graph is drawn.
[0153]
7. Seventh embodiment
The seventh embodiment will be described below.
In the seventh embodiment, a table of initial values, end values, step sizes, etc., which is input on a display range setting screen (hereinafter referred to as “table display range setting window TRW”) of a calculation application table. When an undefined variable is included in the data for setting the display range (hereinafter referred to as “table display range setting data”), the data for n (n is a positive integer) from the initial value and the end value Calculate n pieces of data. The calculated data is displayed on a table display screen (hereinafter referred to as “table window TW”) of the calculation application, and an abbreviation symbol is displayed for the omitted portion for which no value is calculated. is there.
[0154]
7.1 Internal configuration
The configuration of the scientific calculator 1 in the seventh embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with a RAM 750, and the ROM 70 is replaced with a ROM 770. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0155]
FIG. 28 is a diagram showing the configuration of the RAM 750. As shown in the figure, the RAM 750 includes storage areas for data of table display range setting data 57 that is display data in the table display range setting window TRW and table data 58 that is display data in the table window TW.
[0156]
FIG. 29 is a diagram showing the configuration of the ROM 770. According to the figure, the ROM 770 stores a table display processing program 771.
[0157]
The table display processing program 771 is a program for realizing table display processing (see FIG. 30). When the CPU 10 executes the table display processing program 771, table display processing is realized.
[0158]
7.2 Operation
Next, the operation of the scientific calculator 1 in the seventh embodiment will be described.
FIG. 30 is a flowchart for explaining the operation of the scientific calculator 1 according to the table display process, and FIG. 31 is a diagram showing a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. It is.
[0159]
In the table display process shown in FIG. 30, the CPU 10 first switches the table mode from OFF to ON (step S701). Next, the execution of the calculation application is started, and the table display range setting window TRW is displayed on the display unit 40 (step S702). The user inputs and sets the initial value (start), end value (end), and step size (pitch) in the table display range setting window TRW.
[0160]
When the CPU 10 determines that the initial value, end value, and step size data have been input by the user in the table display range setting window TRW (step S703; YES), the input data is stored in the RAM 750 as the table display range setting data 57. (Step S704). Next, the CPU 10 determines whether or not an undefined variable is included in the table display range setting data 57 (step S705). If it is determined that an undefined variable is not included (step S705; NO), The table data is calculated based on the table display range setting data 57 (step S708), and the process proceeds to step S709.
[0161]
On the other hand, when the CPU 10 determines that the table display range setting data 57 includes an undefined variable (step S705; NO), the CPU 10 calculates n pieces of data from the initial value (step S706), and then the termination value. N pieces of data are calculated from (step S707).
[0162]
Next, the CPU 10 stores the table data calculated in steps S706 and S707 or S708 in the RAM 750 as the table data 58 (step S709). Then, the table data is sent to the display unit 40, and the table is displayed on the table window TW (step S710). When the CPU 10 calculates the table data based on the table display range setting data including the undefined variable, in step S710, the CPU calculates between n values calculated from the initial value and the terminal value. Ellipses SH are displayed for values that are not present.
[0163]
FIGS. 31A and 31B show screen transitions until a table is displayed in the table display window TW based on the table display range setting data 57 specified by the user. As shown in FIG. 31 (a), in the table display range setting window TRW, “(Y =) PX” in the formula C9, “1” in the initial value, undefined variable “A” in the end value, and undefined in the step size. When the definition variable “B” is set, the CPU 10 calculates n data (“n = 3” in the figure) from the initial value “1” and n data from the end value “A”. Calculate the data. Then, the calculated data is displayed in the table window TW shown in FIG. 31B, and an abbreviation symbol SH is displayed in the omitted portion.
[0164]
Although not shown, when specific numerical values are set in the table display range setting data 57, all table data is calculated and displayed on the table window TW without displaying the ellipsis SH. If the initial value “1”, the end value “10”, and the step size “2” are designated for the formula C9 “Y = PX” shown in FIG. 31A, the CPU 10 determines that the X value “1,” 2, 5, 7, 9 "and a corresponding Y value" P, 2P, 5P, 7P, 9P "is displayed in the table window TW.
When the above processing is executed, the CPU 10 ends the table display processing.
[0165]
As described above, in the seventh embodiment, when the user inputs the setting data for the table display range, the table based on the setting data is displayed in the table window TW even if the setting data includes an undefined variable. Is displayed.
[0166]
Therefore, even when a specific value is not set in the display range setting data of the table, it is possible to display the table without executing error processing by the scientific calculator 1.
[0167]
8). Eighth embodiment
The eighth embodiment will be described below.
In the eighth embodiment, when an undefined variable is included in data (initial value, terminal value, step size) for setting the table display range input in the table display range setting window TRW, n (n is a positive integer) data and n data are calculated from the end value. Then, the calculated data is displayed in the table window TW, and an ellipsis is displayed for an abbreviated portion for which no value is calculated. Further, when a display instruction for the omitted portion is input, control is performed to calculate and display a general formula for obtaining the value of the omitted portion.
[0168]
8.1 Internal configuration
The configuration of the scientific calculator 1 in the eighth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 850, and the ROM 70 is replaced with the ROM 870. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0169]
FIG. 32 is a diagram showing the configuration of the RAM 850. According to the figure, the RAM 850 includes table display range setting data 57 that is display data in the table display range setting window TRW, table data 58 that is display data in the table window TW, and a table omission portion based on the table data 58. And a data storage area for general data (hereinafter referred to as “general data”) 58a.
[0170]
FIG. 33 is a diagram showing the configuration of the ROM 870. According to the figure, the ROM 870 stores a table selection part display processing program 871.
[0171]
The table selection portion display processing program 871 is a program for realizing the table selection portion display processing (see FIG. 34). When the CPU 10 executes the table selection part display processing program 871, the table selection part display process is realized.
[0172]
8.2 Operation
Next, the operation of the scientific calculator 1 in the eighth embodiment will be described.
FIG. 34 is a flowchart for explaining the operation of the scientific calculator 1 related to the table selection partial display processing, and FIG. 35 is a transition example of the display screen displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0173]
In the table selection partial display process shown in FIG. 34, first, the CPU 10 switches the table mode from OFF to ON (step S801). Next, the execution of the calculation application is started, and the table display range setting window TRW is displayed on the display unit 40 (step S802). In the table display range setting window TRW, the user inputs and sets the initial value (start), end value (end), and step size (pitch).
[0174]
When the CPU 10 determines that the initial value, end value, and step size data are input by the user in the table display range setting window TRW (step S803; YES), the input data is stored in the RAM 850 as the table display range setting data 57. (Step S804).
[0175]
FIG. 35A is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, “Y = PX” is set in the formula C10, “1” is set as the initial value, the undefined variable “A” is set as the end value, and the undefined variable “B” is set as the step size.
[0176]
Next, the CPU 10 determines whether or not an undefined variable is included in the table display range setting data 57 (step S805). If it is determined that an undefined variable is not included (step S805; NO), The table data is calculated based on the table display range setting data 57 (step S808), and the process proceeds to step S809.
[0177]
On the other hand, if the CPU 10 determines that the table display range setting data 57 includes an undefined variable (step S805; NO), after calculating n data from the initial value (step S806), the termination value N pieces of data are calculated (step S807).
[0178]
Next, the CPU 10 stores the table data calculated in steps S806 and S807 or S808 in the RAM 850 as the table data 58 (step S809). Then, the table data is sent to the display unit 40, the table is displayed in the table window TW, and the abbreviation symbol SH is displayed in the portion of the table that is omitted and displayed (step S810).
[0179]
FIG. 35B is a diagram illustrating an example of a display screen displayed on the display unit 40 at this stage. According to the figure, a table based on the table display range setting data set on the screen of FIG. 35A is displayed. The user moves the cursor position by operating the key group 3, and selects a desired value in the table. Then, the CPU 10 reverse-displays data at the cursor position (hereinafter referred to as “trace data”), and displays the trace data “2B + 1” on the trace data display section TD at the lower right of the table data TW.
[0180]
Subsequently, when the CPU 10 determines that a cursor movement (hereinafter referred to as “trace”) is input by the user (step S811; YES), the CPU 10 further determines whether or not the trace position is a portion of the ellipsis SH. A determination is made (step S812). If the CPU 10 determines that the portion of the ellipsis SH has been traced (step S812; YES), the CPU 10 moves the cursor to the ellipsis SH and highlights it, and calculates a general expression for the data of the omitted portion. Then, it is stored in the RAM 850 as general formula data 58a (step S813). Then, the calculated general formula is set in the trace data (step S814), and the process proceeds to step S816.
[0181]
FIG. 35C is a diagram showing an example of a display screen displayed on the display unit 40 at this stage. According to the figure, the portion of the ellipsis SH is being traced, and the ellipsis SH is highlighted. The general formula “X = t, Y = tP” is displayed in the trace data display part TD at the lower right of the table window TW.
[0182]
On the other hand, if the CPU 10 determines that data other than the ellipsis SH has been traced (step S812; NO), it moves the cursor to the trace data, highlights it, and sets the trace data (step S815). The process proceeds to step S816.
[0183]
Subsequently, the CPU 10 displays the trace data on the trace data display unit TD (step S816). Next, the CPU 10 determines whether or not the movement of the cursor is detected (step S817). If the movement of the cursor is detected (step S817: YES), the CPU 10 returns to step S812. On the other hand, when the movement of the cursor is not detected (step S817; NO), the CPU 10 further determines whether or not there is an end input by the user (step S818). CPU10 complete | finishes a table selection part display process, when an end input is made by the user (step S818; YES), and when an end input is not made (step S818; NO), it performs another process.
[0184]
As described above, in the eighth embodiment, when the user sets a numerical value or an undefined variable for the table display range setting data 57, a table is displayed in the table window TW. When the cursor is moved and the ellipsis SH in the table is traced, a general formula indicating the data of the ellipsis SH is displayed.
[0185]
Therefore, even when an undefined variable is included in the table display range setting data 57, the desired table can be displayed and the data can be confirmed. Further, when the ellipsis SH in the table is traced, the data of the omitted part can be confirmed by a general formula.
[0186]
9. Ninth embodiment
The ninth embodiment will be described below.
In the ninth embodiment, an increase / decrease table is calculated on the basis of the mathematical formula input in the mathematical formula window FW, and is displayed on the increase / decrease table display screen (hereinafter referred to as “increase / decrease table window ATW”). When an undefined variable is included in the mathematical formula input in the mathematical formula window FW, the value of the undefined variable is classified. Then, an increase / decrease table is calculated for each case classification. Further, in accordance with a display switching instruction from the user, control is performed to switch and display the increase / decrease table for each case one by one in the increase / decrease table window ATW.
[0187]
9.1 Internal configuration
The configuration of the scientific calculator 1 in the ninth embodiment has a configuration in which the RAM 50 of the scientific calculator 1 shown in FIG. 2 in the first embodiment is replaced with the RAM 950, and the ROM 70 is replaced with the ROM 970. For this reason, the same code | symbol is attached | subjected to the same function part and the overlapping description is abbreviate | omitted.
[0188]
FIG. 36 is a diagram showing the configuration of the RAM 950. According to the figure, there is a storage area for each data of formula data 55 that is display data in the formula window FW and increase / decrease table data 59 that is display data in the increase / decrease table window ATW.
[0189]
FIG. 37 is a diagram showing the configuration of the ROM 970. According to the figure, the ROM 970 stores an increase / decrease table display processing program 971.
[0190]
The increase / decrease table display processing program 971 is a program for realizing the increase / decrease table display processing (see FIG. 38). The CPU 10 executes the increase / decrease table display processing program 971, thereby realizing the increase / decrease table display processing.
[0191]
9.2 Operation
Next, the operation of the scientific calculator 1 in the ninth embodiment will be described.
FIG. 38 is a flowchart for explaining the operation of the scientific calculator 1 related to the increase / decrease table display processing. FIGS. 39 and 40 are examples of display screens displayed on the display unit 40 in the operation shown in the flowchart of FIG. FIG.
[0192]
In the increase / decrease table display process shown in FIG. 38, first, the CPU 10 switches the increase / decrease table mode from OFF to ON (step S901). Next, the execution of the calculation application is started, and the mathematical expression window FW and the increase / decrease table window ATW are displayed on the display unit 40 (step S902). The user uses the key group 3 to input a desired mathematical formula in the mathematical formula window FX and then inputs a command for creating an increase / decrease table.
[0193]
Then, when the CPU 10 detects that a mathematical formula has been entered in the mathematical formula window FW and a command for creating an increase / decrease table has been entered (step S903; YES), the CPU 10 stores the mathematical formula as mathematical formula data 55 in the RAM 950 (step S904).
[0194]
FIG. 39 is a diagram showing an example of a display screen displayed on the display unit 40 at this stage. According to the figure, the display unit 40 displays a mathematical expression window FW and an increase / decrease table window ATW. The mathematical formula window FW displays a mathematical formula C11 “Y1: (X−2) (X + 1) (X−A)” input by the user.
[0195]
Next, the CPU 10 determines whether or not an undefined variable is included in the mathematical formula data 55 (step S905). When the CPU 10 determines that the undefined variable is included in the mathematical formula data 55 (step S905; YES), the CPU 10 executes the case classification of the undefined variable (step S906). Next, the CPU 10 calculates an increase / decrease table for each case (step S907), and stores the calculated increase / decrease table data in the RAM 950 as the increase / decrease table data 59 (step S908). Next, the CPU 10 displays one increase / decrease table among the divided cases in the increase / decrease table window ATW (step S909).
[0196]
Here, the user inputs an instruction to switch display using the key group 3 when displaying the increase / decrease table according to other cases. Then, the CPU 10 determines whether or not a display switching instruction has been input (step S910). If the CPU 10 determines that a display switching instruction has been input (step S910; YES), the CPU 10 increases or decreases the increase / decrease table for the next case. The information is displayed on the front window ATW (step S911). On the other hand, when the CPU 10 determines that the display switching instruction is not input (step S910; NO), the CPU 10 ends the increase / decrease table display process.
[0197]
40 (a), (b), and (c) show the display unit when an undefined variable is included in the mathematical formula input to the mathematical formula window FW and a display switching instruction is inputted in step S910. FIG. 14 is a diagram showing a transition example of a display screen displayed on 40. For example, as shown in FIG. 39, when a mathematical formula C11 “(X−2) (X + 1) (X−A)” including an undefined variable A is input to the mathematical formula window FW, the CPU 10 determines that “A < −1 ”,“ −1 <A <2 ”, and“ A> 2 ”are executed, and an increase / decrease table for each case is created. FIG. 40A shows an increase / decrease table in the case of “A <−1”, FIG. 40B shows an increase / decrease table in the case of “−1 <A <2”, and an increase / decrease table in the case of “A> 2”. Is shown in FIG. Each time the CPU 10 detects a display switching instruction input, the CPU 10 sequentially displays the screens of FIGS. 40A, 40B, and 40C in the increase / decrease table window ATW. ) Increase / decrease table.
[0198]
If the CPU 10 determines that the undefined variable is not included in the formula data 55 in step S905 described above (step S905; NO), the CPU 10 calculates an increase / decrease table based on the formula data 55 (step S912), and the calculated increase / decrease table. Is stored in the RAM 950 as the increase / decrease table data 59 (step S913). Next, the CPU 10 displays the increase / decrease table in the increase / decrease table window ATW (step S914), and ends the increase / decrease table display process.
[0199]
As described above, in the ninth embodiment, when the user inputs a formula and inputs a command for instructing creation of the increase / decrease table, the increase / decrease table based on the formula is displayed on the display unit 40. When an undefined variable is included in the input mathematical formula, the scientific calculator 1 executes case classification processing for the value of the undefined variable, and an increase / decrease table for each case classification is displayed.
[0200]
Therefore, an increase / decrease table of mathematical formulas including undefined variables can be displayed on the scientific calculator 1, and the user can use it for learning and the like.
[0201]
The detailed configuration and detailed operation of the scientific calculator 1 in each of the first to ninth embodiments can be changed as appropriate without departing from the spirit of the present invention.
[0202]
【The invention's effect】
  Claim 1 or4According to the invention described in the above, when an undefined variable is included in the coordinate range for displaying the graph, the coordinate range is set by substituting a temporary value for the undefined variable, and the graph is displayed.In addition, after displaying the graph in the coordinate range where the temporary value is assigned to the undefined variable, the coordinate value corresponding to the position of the trace pointer on the graph can be calculated and displayed.It is possible to support the user's thought at the time of calculation and improve the convenience of the electronic device having the graph display function.
[0203]
  According to invention of Claim 2,When the same undefined variable is included in the graph command and the coordinate range, the value to be assigned to the undefined variable can be reset as appropriate so that the graph fits in the coordinate range.
[0204]
  According to invention of Claim 3,When an undefined variable is included in the scale value, a scale can be displayed by substituting a temporary value for the undefined variable.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of the appearance of a scientific calculator to which the present invention is applied.
FIG. 2 is a block diagram showing an internal configuration of the scientific calculator of FIG.
FIG. 3 is a diagram illustrating a configuration of a RAM according to the first embodiment.
FIG. 4 is a diagram showing a configuration of a ROM in the first embodiment.
FIG. 5 is a flowchart for explaining the operation of the scientific calculator related to the first graph drawing process;
6 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 7 is a diagram illustrating a configuration of a RAM according to a second embodiment.
FIG. 8 is a diagram illustrating a configuration of a ROM in a second embodiment.
FIG. 9 is a flowchart for explaining the operation of the scientific calculator related to the second graph drawing process;
10 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 11 is a diagram illustrating a configuration of a RAM according to a third embodiment.
FIG. 12 is a diagram illustrating a configuration of a ROM according to a third embodiment.
FIG. 13 is a flowchart showing the operation of the scientific calculator related to the scale display process.
14 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 15 is a diagram illustrating a configuration of a RAM according to a fourth embodiment.
FIG. 16 is a diagram showing a configuration of a ROM in the fourth embodiment.
FIG. 17 is a flowchart showing the operation of the scientific calculator related to the graph display position specifying process.
18 is a diagram showing a transition example of the display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 19 is a diagram showing another display example of the display screen shown in FIG.
FIG. 20 is a diagram illustrating a configuration of a RAM according to a fifth embodiment.
FIG. 21 is a diagram illustrating a configuration of a ROM in a fifth embodiment.
FIG. 22 is a flowchart showing the operation of the scientific calculator related to the condition setting graph drawing process.
23 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 24 is a diagram illustrating a configuration of a RAM according to a sixth embodiment.
FIG. 25 is a diagram showing a configuration of a ROM in the sixth embodiment.
FIG. 26 is a flowchart illustrating an operation of a scientific calculator related to a condition satisfaction graph full drawing process.
27 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
FIG. 28 is a diagram illustrating a configuration of a RAM according to a seventh embodiment.
FIG. 29 is a diagram showing a configuration of a ROM in a seventh embodiment.
FIG. 30 is a flowchart showing an operation of a scientific calculator related to table display processing.
FIG. 31 is a diagram showing a transition example of the display screen displayed on the display unit in the operation shown in the flowchart of FIG. 30;
FIG. 32 is a diagram illustrating a configuration of a RAM according to an eighth embodiment.
FIG. 33 is a diagram showing a structure of a ROM in the eighth embodiment.
FIG. 34 is a flowchart showing the operation of a scientific calculator related to table selection partial display processing.
35 is a diagram showing a transition example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG. 34. FIG.
FIG. 36 is a diagram illustrating a configuration of a RAM according to a ninth embodiment.
FIG. 37 is a diagram showing a configuration of a ROM in a ninth embodiment.
FIG. 38 is a flowchart showing the operation of the scientific calculator related to the increase / decrease table display process.
FIG. 39 is a diagram showing an example of a display screen displayed on the display unit in the operation shown in the flowchart of FIG.
40 is a diagram showing a transition example of the display screen displayed on the display unit in the operation shown in the flowchart of FIG. 38. FIG.
[Explanation of symbols]
1 Scientific calculator
2 display
3 key group
4 Input pen
10 CPU
20 Input section
30 tablets
31 Position detection circuit
40 display section
41 Display drive circuit
50, 250, 350, 450, 550, 650, 750, 850, 950 RAM
51 Display range setting data
51a Display range temporary substitution value data
51b Scale value temporary substitution value data
52 Graph data
52a Graph data
52b Graphical temporary substitution data
53 Coordinate value data
54 Command data
54a Command temporary substitution value data
55 Formula data
56 Condition data
57 Table display range setting data
58 Table data
58a General formula data
59 Increase / decrease table data
70, 270, 370, 470, 570, 670, 770, 870, 970 ROM
71 First graph drawing processing program
271 Second graph drawing processing program
371 Scale display processing program
372 Scale default data
471 Graph display position specification processing program
571 Condition setting graph drawing processing program
671 Condition Satisfaction Graph All Drawing Processing Program
771 Table display processing program
871 Table selection part display processing program
971 Increase / decrease table display processing program
90 storage device
100 storage media
RW display range setting window
GW graph window
CW command window
FW formula window
WW type display column
IA condition data input field
TRW table display range setting window
TW table window
SH ellipsis
TD Trace data display section
ATW increase / decrease table window

Claims (4)

A coordinate range input means for inputting a coordinate range for displaying a graph;
Determining means for determining whether or not an undefined variable is included in the coordinate range input by the coordinate range input means;
Control by which a temporary value is set for the undefined variable and a graph is displayed for the coordinate range to which the set temporary value is substituted when it is determined by the determining means that the coordinate range includes an undefined variable. Graph display control means for performing
On the graph displayed by the graph display control means, trace pointer display control means for performing control to display a trace pointer that moves in accordance with the movement operation;
Control for calculating the position of the trace pointer in the coordinate range using the undefined variable and displaying it as a coordinate value when it is determined by the determining means that the coordinate range includes an undefined variable Coordinate value display control means for performing,
An electronic device with a graph display function, comprising: Command input means for inputting a graph command for uniquely specifying a graph expression;
A second discriminating unit that discriminates whether or not the same undefined variable is included in the graph range command input by the command input unit and the coordinate range input by the coordinate range input unit;
Further comprising
The graph display control unit is a unit that performs control to display a graph of a graph type specified by a graph command input by the command input unit, and includes the same undefined variable by the second determination unit. When it is determined that the graph is within the coordinate range to which the provisional value is assigned, based on a predetermined accommodation condition the electronic apparatus according to claim 1, wherein said housing has a means for controlling the condition is satisfied like the reset the temporary value to display a graph of the graph formula, it is characterized in. A scale value input means for inputting a scale value representing a value for one unit of the scale;
Third determination means for determining whether or not an undefined variable is included in the scale value input by the scale value input means;
If it is determined by the third determining means that the scale value contains an undefined variable, a temporary value is set for the undefined variable, and the scale is displayed with the scale value substituted with the set temporary value. Scale display control means for performing control, and
The electronic device according to claim 1 or 2, characterized in that it comprises a. On the computer,
A coordinate range input function for inputting a coordinate range for displaying a graph;
A determination function for determining whether or not an undefined variable is included in the coordinate range input by the coordinate range input function;
Control that displays a graph for the coordinate range in which a temporary value is set for the undefined variable and the set temporary value is substituted when it is determined by the determination function that the coordinate range includes an undefined variable. A graph display control function for performing
A trace pointer display control function for performing control to display a trace pointer that moves in accordance with the movement operation on the graph displayed by the graph display control function;
Control for calculating the position of the trace pointer in the coordinate range using the undefined variable and displaying it as a coordinate value when it is determined by the determination function that the coordinate range includes an undefined variable Coordinate value display control function to perform
A program to realize

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