JP4479826B2 - Increase / decrease table display control device and program - Google Patents

Description

  The present invention relates to an increase / decrease table display control device that controls to display an increase / decrease table of an input mathematical formula.

  Conventionally, some electronic calculators such as scientific calculators have a function of inputting a mathematical expression and displaying it in a graph and are used in various learning situations such as mathematics classes and individual learning.

  For example, when an arbitrary curve or straight line is drawn with an input pen on an LCD having a touch panel on the display surface, a mathematical expression that approximates the locus is calculated and the mathematical expression can be input (for example, (See Patent Document 1).

  In addition, there is also known one capable of calculating a derivative of an input mathematical formula and displaying an increase / decrease table of the mathematical formula (for example, see Patent Document 2). Since it is not necessary to obtain the derivatives and their solutions by hand, and create an increase / decrease table for each variable domain, it is possible to increase the efficiency of learning when used, for example, in mathematics classes.

JP-A-6-175777 JP 2000-155745 A

  An overview of a conventional electronic computer that inputs and uses a function has the following problems in terms of usability. That is, (1) Conventionally, an arrow used to indicate an increase / decrease tendency in an increase / decrease table is an arrow that rises to the right or falls to the right. However, when comparing an increase / decrease table of parameter formulas (X = f (t), Y = g (t)) describing variables X and Y using the parameter t with a graph of the parameter formulas, it is used in the increase / decrease table. The direction of the arrow to be displayed and the direction of the X-axis / Y-axis coordinates of the graph do not match, so the impression of increase / decrease received from the arrow of the increase / decrease table and the impression of increase / decrease in the graph are inconsistent and difficult to compare There was a problem to say. (2) When comparing an increase / decrease table of parameter formulas with the graph, when considering a point on the graph, when the value of the parameter t increases, it is considered which of the XY coordinate axes to move from that point It was difficult to understand because it was necessary to judge by comparing the increase and decrease tables one by one.

  (3) In some cases, it may be appropriate to create an increase / decrease table by converting to a parameter formula. In this case, however, it is necessary to manually convert the parameter formula into a parameter formula, which is cumbersome. (4) If you think it would be better to input a formula in the format Y = f (X) and display the increase / decrease table and then convert it to a parameter formula, you need to start typing the formula itself from the beginning. It was inconvenient.

  (5) A series of key operations for displaying an increase / decrease table by inputting a mathematical expression for displaying the increase / decrease table is troublesome. (6) When comparing the parameter formula increase / decrease table and the graph at the same time, the displayed part of the increase / decrease table may not be displayed properly. It was inconvenient to set up.

  (7) When displaying an increase / decrease table of mathematical formulas including undefined variables, it is necessary to display the increase / decrease table by separately inputting mathematical formulas separately according to the conditions of values that can be taken by undefined variables. For this reason, comparing the differences of undefined variables according to conditions requires inconvenience from input to display each time. (8) After displaying an increase / decrease table of mathematical formulas including undefined variables, when setting specific numerical values for undefined variables, it is inconvenient that the numerical formulas with specific numerical values must be entered again. It was. (9) To set the condition of possible values of undefined variables, enter a formula that includes undefined variables, and display the increase / decrease table in a format that includes undefined variables, to display the increase / decrease table under different conditions However, it was inconvenient because it was necessary to start again from the input of the condition setting.

  (10) When it is desired to compare the respective increase / decrease tables for a plurality of mathematical expressions, it is inconvenient to repeat the mathematical expression input / selection operation and the increase / decrease table display operation for each mathematical expression. In addition, since each operation takes time, it is difficult to compare and compare a plurality of increase / decrease tables. (11) When only one set of increase / decrease table and graph can be displayed, when comparing the increase / decrease table and graph of each of a plurality of mathematical formulas, both switching of the increase / decrease table display and switching of the graph display are performed. It was inconvenient to operate. (12) Since an increase / decrease table of a plurality of mathematical formulas could not be displayed as a single increase / decrease table, it is inconvenient that the formula input / selection operation and the increase / decrease table display operation must be repeated for each mathematical formula. there were.

(13) When comparing the graph of the entered numerical increase / decrease table and the graph at the same time, the relationship between the range displayed in the increase / decrease table and the display range of the graph is not appropriate. And there was a problem that the part of the graph showing the minimum value was not displayed.
(14) When comparing the graph of the entered mathematical formula and graph simultaneously, the graph display range is displayed as a graph with the default setting of the graph display range, so the graph display is not suitable for comparison with the graph. There was a case. (15) Since the display showing the process of calculating the components of the increase / decrease table is not displayed, it is inconvenient to separately understand the process of creating the increase / decrease table with a textbook or the like.

  An object of the present invention is to solve these problems and to realize an increase / decrease table display function that is easier to use when displaying a graph of an input mathematical expression and an increase / decrease table for comparison.

In order to solve the above-described problem, the increase / decrease table display control device according to the first aspect of the present invention includes a mathematical expression input means for inputting a mathematical expression and a configuration of an independent variable term of the inputted mathematical expression comprising a root sign term. A parameter formula generation unit that generates a parameter formula of the formula using the root sign term as a parameter, and an increase / decrease table of the parameter formula generated by the parameter formula generation unit as the increase / decrease table of the input formula And an increase / decrease table display control means for performing control.

Further, the program of the invention described in claim 3, the computer, and formulas input function of inputting a formula if the configuration of the independent variable term equations is the input consists of square root term, the root sign term parameters the a parameter expression generating function of generating a parametric equation, a decrease table of equations are the input, decreasing table display control for controlling to display a decrease table of the generated parametric by the parametric generation of a And realize the function.

  The configuration of the independent variable term mentioned here is the form of the term of the independent variable X, such as √h (X), (X + n; n is a constant), etc. Can be set. When the term of the independent variable X in the mathematical formula has such a configuration, it is often possible to express the characteristics of the mathematical formula more easily if the term is replaced with a parameter.

The invention according to claim 2 is the increase / decrease table display control device according to claim 1, wherein the increase / decrease table display control means is configured such that when a mathematical expression is copied in a predetermined screen display area, It is a means for displaying an increase / decrease table.

According to the first or third aspect of the present invention, when the configuration of the independent variable term of the input mathematical formula includes a root sign term , the parameter formula of the mathematical formula is automatically generated, and an increase / decrease table of the parameter formula Can be displayed. Therefore, even if the conversion into the parameter formula is performed manually and then is not input, the parameter formula can be automatically displayed in the form of an increase / decrease table, thereby improving convenience.

According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be achieved, and a mathematical expression for displaying the increase / decrease table can be designated by a copying operation. The copying operation here refers to so-called “copy and paste”, “drag and drop”, and the like. Therefore, a series of operations for inputting a mathematical expression for displaying an increase / decrease table and executing the display of the increase / decrease table is facilitated, and usability is improved.

[First Embodiment]
Next, as a first embodiment to which the present invention is applied, a case where an increase / decrease table and a graph of a mathematical formula input using a multi-function scientific calculator are displayed will be described as an example. The application of the present invention is not limited to a multi-function scientific calculator, and similarly applies to other electronic computers and electronic devices such as personal computers, PDAs (personal digital assistants), and multi-function mobile phones. it can.

[Description of configuration]
FIG. 1 is a diagram showing an example of a configuration in the present embodiment. As shown in the figure, a multi-function scientific calculator 1200 according to the present embodiment includes an LCD (Liquid Crystal Display) 1202 for displaying characters, mathematical formulas, figures, and the like, and operation input keys for inputting numerical values, functions, and arithmetic operations. 1204, an arithmetic unit 1206 that performs arithmetic processing, and a power source (not shown) such as a built-in battery or a solar battery, and is casing in a card shape with metal or resin.

  The LCD 1202 is realized by a display panel that can display characters, symbols, images, and the like using dots and its driver circuit. The display element is not limited to the LCD, but may be, for example, an ELD (Electronic Luminescent Display), a CRT (Cathode Ray Tube), or a PDP (Plasma Display Panel). Further, the LCD 1202 may be composed of a plurality of display panels. In this embodiment, a touch panel 1203 is provided on the display surface of the LCD 1202, and various operation inputs can be performed by operations such as touch and slide with the stylus pen 1208.

  The operation input key 1204 is means for inputting numerical values, functions, calculation symbols, and various operations necessary for calculation, and is realized by, for example, a button switch (hard key), a dial, a cross direction button switch, or the like.

  The arithmetic unit 1206 is realized by, for example, a CPU (Central Processing Unit), various IC memories, an SOC (System On a Chip), an ASIC (Application Specific Integrated Circuit), and the like, and stores various programs stored in various IC memories. The multi-function scientific calculator 1200 is integratedly controlled by reading and performing arithmetic processing.

  The multi-function scientific calculator 1200 includes a slot 1210 for the storage medium 1212. The storage medium 1212 is a detachable information storage medium that stores programs and data, such as an IC memory card or MO. The slot 1210 is a device that can read and write data from and to the storage medium 1212 and is appropriately selected according to the type of the storage medium 1212. When the storage medium 1212 is an MO or the like, it may be a connection terminal such as IEEE1394 (Institut of Electronic Engineers 1394) or USB (Universal Serial Bus) that can be connected to an external device such as an MO drive device.

  The connector 1214 is a terminal to which a cable for transmitting / receiving data to / from a communication line 1216 or an external device (for example, a cradle, a measuring instrument, a data collector, a printer, a modem, a mobile phone, a personal computer, etc.) and a control unit thereof. It is. For example, various forms such as USB, IEEE 1394, and RJ-45 are appropriately selected as the connection form. However, the connection form is not limited to wired communication, and data transmission / reception may be realized using radio waves such as infrared rays. In this case, the connector 1214 is a wireless transmission / reception module and a wireless transmission / reception terminal.

  The user can input a desired mathematical expression by operating the operation input key 1204 or operating the touch panel 1203 with the stylus pen 1208 to display an increase / decrease table or a graph on the LCD 1202.

  FIG. 2 is a diagram for explaining the configuration of the display screen of LCD 1202 in the present embodiment. As shown in the figure, the display screen of the LCD 1202 is for a common operation such as a first display area G1, which is an upper main display area, a second display area G2, which is a lower main display area, and a menu bar. The common display area G3 and the common display area G4 are displayed, and different contents are managed and displayed for each area.

[Description of functional block]
FIG. 3 is a functional block diagram illustrating an example of a functional configuration of the multi-function scientific calculator 1200 according to the present embodiment.

  The multi-function scientific calculator 1200 includes a CPU 10, an input unit 12, a display unit 14, a communication control unit 16, a storage medium reading unit 20, a RAM (Random Access Memory) 30, and a ROM (Read Only Memory) 40. These components are connected to each other so that data can be transmitted and received.

  The CPU 10 controls each functional block and executes various arithmetic processes, and controls the multi-function scientific calculator 1200 in an integrated manner. The function is realized by appropriately reading out various programs and data stored in the RAM 30 and the ROM 40 and performing arithmetic processing in the same manner as a conventional scientific calculator. In FIG. 1, the CPU 10 is built in as an arithmetic unit 1206 together with the RAM 30 and the ROM 40.

  The input unit 12 inputs numbers, characters, function expressions, and various operations, and outputs operation signals to the CPU 10. The input unit 12 is realized by a push switch, a keyboard, a mouse, a tablet, a touch panel, and the like. The operation input key 1204 and the touch panel 1203 in FIG.

The display unit 14 is a means for displaying numerical values, functional expressions, graphics, various operation screens, and the like in accordance with instructions from the CPU 10, and stores display elements that can display images, their driver circuits, and data for display. This is realized by a buffer or the like. In FIG. 1, the LCD 1202 corresponds to this.
Further, the display unit 14 can divide and manage the buffer into a plurality of areas and set a plurality of virtual display areas on the display screen. In other words, the CPU 10 can display different contents in each area, such as displaying an increase / decrease table or displaying a graph for each set area.

  The communication control unit 16 is means for controlling transmission / reception of data to / from other apparatuses via the communication line 18, and is realized by, for example, a predetermined program, a communication control LSI, a connection terminal, and the like. In FIG. 1, the connector 1214 corresponds to this.

  The communication line 18 is a communication medium capable of transmitting and receiving data by wire / wireless. For example, a direct cable connection with a LAN (Local Area Network), the Internet, a mobile phone network, and peripheral devices. Applicable. In FIG. 1, the communication line 1216 corresponds to this.

  The storage medium reading unit 20 is means for reading and writing data from / to a storage medium 22 such as an IC memory card, CD-ROM, MO, DVD-RAM, FD (registered trademark), and hard disk. In FIG. 1, the slot 1210 corresponds to the storage medium reading unit 20, and the storage medium 1212 corresponds to the storage medium 22.

  The RAM 30 temporarily stores programs and various data as a work area of the CPU 10. FIG. 4 is a diagram showing an example of the configuration of the storage area of the RAM 30 in the present embodiment. As shown in the figure, in the present embodiment, (1) a mathematical formula data storage area 302R302R that stores mathematical formulas input by a user in data in a format that can be processed, and (2) an increase / decrease table for display. An increase / decrease table data storage area 304R for storing data, (3) a graph data storage area 306R for storing data for displaying a graph of an input mathematical formula, and (4) a pointer for moving on a graph line. A pointer data storage area 308R for storing the above data, and (5) a mark data storage area 310R for storing information for displaying an arrow mark accompanying the pointer. Further, although not shown, data relating to setting of the screen display area of the LCD 1202 and the like are also stored as appropriate.

  FIG. 5 is a diagram showing an example of the formula data 302 stored in the formula data storage area 302R in the present embodiment. The mathematical formula data 302 stores a mathematical formula 302a. In the figure, the mathematical formula 302a is described as a specific mathematical formula, but the inputted mathematical formula is stored in a data format that can be processed. In this embodiment, a parameter expression (X = f (t), Y = g (t)) that describes variables X and Y as a mathematical expression with a common parameter t is stored as the mathematical expression 302a. , A mathematical expression in the form of Y = f (X) where the variable X is an independent variable and the variable Y is a dependent variable (hereinafter, referred to as a standard format in the present embodiment) may be used.

  It should be noted that character types that can be used as independent variables, dependent variables, parameters, and undefined variables in the mathematical expression description in the mathematical expression data 302 are defined in advance, and are assumed to be known in advance by a user or the like to the user. That is, the CPU 10 can identify the type of the term by determining the character type of each term of the formula 302 a stored in the formula data 302. Incidentally, in this specification, “X” and “Y” in an equation represent independent variables or dependent variables, “t” represents a parameter in the parameter equation, and “a”, “b”... Represent undefined variables. It will be explained as a thing.

  FIG. 6 is a diagram showing an example of the increase / decrease table data 304 stored in the increase / decrease table data storage area 304R in the present embodiment. As shown in the figure, the increase / decrease table data 304 includes a parameter range 304a that is a range of parameter values in the parameter formula, and a use arrow 304b that is form information of an arrow used to represent an increase / decrease tendency in the increase / decrease table. The increase / decrease table component 304c and the increase / decrease table area 304d are stored in association with each other. In addition, the area | region said here is also called the area | region of an increase / decrease table | surface, and shows the range of the value of an independent variable or a parameter formula. That is, the area means a value (root) of the first-order differential expression of the mathematical formula and a range of values divided by this value.

  FIG. 7 is a diagram showing an example of the graph data 306 stored in the graph data storage area 306R in the present embodiment. As shown in the figure, the graph data 306 sets the origin coordinate 306a of the coordinate axis in the screen coordinate system of the LCD 1202, the graph line data 306b which is a function or vector data for drawing a graph line, and the range of the coordinate system. Range setting data 306c to be stored is stored.

  Pointer data (not shown) stored in the pointer data storage area 308R stores a coordinate value of the pointer in the screen coordinate system of the LCD 1202 or a coordinate value in the graph coordinate system. The pointer displays a specific point of the graph in an easy-to-see manner, and is displayed as a predetermined mark such as a cross or a circle.

  The mark data (not shown) stored in the mark data storage area 310R stores the coordinate value in the screen coordinate system of the LCD 1202 of the arrow mark displayed accompanying the pointer, or the coordinate value in the graph coordinate system. Although the arrow mark is used, the shape is not limited to the arrow, and any shape may be applied as long as it can indicate the direction.

  FIG. 8 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment includes a system support program (not shown), a learning support program 400 for realizing various functions for displaying an increase / decrease table of mathematical expressions input by the user on the multi-function scientific calculator 1200, and mathematical expressions. And an arrow TBL 412 for associating the types of arrows and the types of arrows indicating the increase / decrease tendency used in the increase / decrease table. Although not shown, various types of driver software, screen display fonts, graphic data such as display frames, and the like are stored in advance here.

  The learning support program 400 includes (1) a mathematical expression input program 402 for causing the CPU 10 to realize mathematical functions, numbers, characters, and the like, and (2) an increase / decrease table for realizing a function for creating and managing increase / decrease table data. A data creation program 404; (3) an increase / decrease table display control program 406 for realizing a function of controlling the display unit 14 to display the increase / decrease table data as a so-called increase / decrease table; Link trace program 408 for realizing the function of displaying the relative relationship between the increase / decrease table and the graph by displaying a pointer on the graph and (5) the function for displaying the graph of the mathematical expression on the display unit 14 A graph drawing program 410 to be executed.

The mathematical expression input program 402 realizes an input function such as a mathematical expression by the operation input key 1204 and also an input function by a drag and drop operation by the stylus pen 1208.
For example, the stylus pen 1208 is touched on the touch panel 1203 and is dragged in the vertical and horizontal directions with the intention of touching a mathematical formula, number, or character displayed on the LCD 1202. And drop it in a predetermined area in the display screen that means an input field (remove the stylus pen 1208 from the touch panel 1203), the mathematical formula or number displayed at the position where the stylus pen 1208 touched first, Assume that you have entered characters.

  The link trace program 408 calls the increase / decrease table display control program 406 on the first display area G1 and the second display area G2 set on the LCD 1202, and displays the increase / decrease table input in one display area, The graph drawing program 410 is called to display the graph of the mathematical formula input in the other display area. Then, the pointer is controlled so as to move on the graph line according to the user's operation input, and the area of the increase / decrease table corresponding to the graph coordinate value at which the pointer is located is characterized (for example, reverse display or shaded display) And realize the function to display. As a result, it is possible to assist the user in understanding the relative relationship between the increase / decrease table and the graph.

  The graph drawing program 410 has a function of creating and managing the graph data 306, setting the coordinate axes for displaying the graph of the mathematical expression input in the designated screen display area, and displaying the coordinate axes and the graph lines. make it happen.

  FIG. 9 is a diagram illustrating an example of an arrow TBL 412 in the present embodiment. The arrow TBL 412 stores the input mathematical expression type 412a in association with arrow data 412b which is image data or vector data used as a notation indicating the increasing tendency of the dependent variable in the increase / decrease table of the type.

  Specifically, in a standard mathematical expression described by Y = f (X), a rising arrow is set when showing an increasing tendency, and a falling arrow is shown when showing a decreasing tendency. Is set. Also, in the parameter expression described by X = f (t) and Y = g (t), a right arrow is set when the dependent variable X increases, and a left arrow is set when the dependent variable X decreases. Yes. This is because the graph drawing according to the present embodiment uses an XY orthogonal coordinate system in which the horizontal direction of the screen is the X axis and the vertical direction is the Y axis. Corresponds to the direction of movement. Similarly, in the parameter formula, an upward arrow is set when the dependent variable Y increases, and a downward arrow is set when the dependent variable Y decreases. In the present embodiment, an XY orthogonal coordinate system has been described as an example. However, the present invention is not limited to this, and may be set as appropriate according to the direction of the coordinate axis at the time of graph drawing.

  Note that the program and data stored in the RAM 30 and ROM 40 may be stored in the storage medium 22. Of course, it may be configured to download from an external device such as a server via the communication line 18 or install from the storage medium 22.

[Description of process flow]
FIG. 10 is a flowchart for explaining the overall processing flow in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the system program and the learning support program 400.

  As shown in the figure, the CPU 10 first displays an expression editor screen for inputting an expression in the first display area G1 (step S2). When the user operates the operation input key 1204 to write a mathematical expression on the expression editor screen, the CPU 10 stores the mathematical expression data 302 in the RAM 30 in accordance with the operation input signal from the operation input key 1204 (step S4). Specifically, for example, as shown in FIG. 13A, the expression editor screen W1 is displayed in the first display area G1. On the formula editor screen W1, a plurality of formulas can be input.

  If a mathematical expression is input, the CPU 10 executes an increase / decrease table data creation process to generate the input / output increase / decrease table data 304 and store it in the RAM 30 (step S6).

  FIG. 11 is a flowchart for explaining the flow of the increase / decrease table data creation process in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the increase / decrease table data creation program 404.

  As shown in the figure, the CPU 10 first determines the type of the input mathematical formula (step S20), and if the mathematical formula is a parameter formula (step S22; YES), the arrow data associated with the parameter formula from the arrow TBL412. 412b is referred to (step S24) and stored in the use arrow 304b of the increase / decrease table data 304 (step S28). Similarly, when the mathematical expression is the standard mathematical expression (the mathematical expression in the form of Y = f (X)) in the present embodiment (step S22; NO), the arrow associated with the standard mathematical expression The data 412b is referred to (step S26) and stored in the use arrow 304b of the increase / decrease table data 304 (step S28).

When the arrow to be used in the increase / decrease table is determined, the increase / decrease table data 304 of the mathematical formula input using the arrow is generated (step S30). That is, the input mathematical component 304c and each region 304d are stored in association with each other. Note that a specific method for generating the increase / decrease table data 304 is well known, and a detailed description thereof will be omitted.
When the increase / decrease table data 304 is generated, the flow returns to the flow of FIG.

  In FIG. 10, the CPU 10 next executes the increase / decrease table display control program 406 to display the increase / decrease table screen in the second display area G2 based on the increase / decrease table data 304 (step S8).

  Specifically, for example, as shown in FIG. 13B, the increase / decrease table screen W2 is displayed in the second display area G2 of the LCD 1202. In the increase / decrease table display W2, an increase / decrease table of the input mathematical formula is displayed. As shown in the figure, the arrow indicating the increase / decrease tendency of the X component is displayed as an arrow pointing to the right or left, and the arrow indicating the increase / decrease tendency of the Y component is expressed as an arrow pointing upward or downward. Conventionally, even in the parameter expression increase / decrease table, the increasing tendency is indicated by the same upward-sloping arrow for both the X component and the Y component, and the decreasing tendency is indicated by the same downward-sloping arrow. In the table, it was difficult to distinguish between X and Y, and the relationship between X and Y was difficult to judge. However, by displaying the arrows as shown in the figure, the direction of the X component arrow, the direction of the Y component arrow, and the image of the coordinate axis of the graph can be easily combined, and the user can set the X component and the Y component. The tendency can be made easier to distinguish, and the relationship between X and Y can be more intuitively understood.

  In FIG. 10, after the increase / decrease table screen W2 is displayed, when the user inputs a predetermined operation for executing link trace (step S10), the CPU 10 reads the link trace program 408 and executes link trace processing (step S10). Step S12).

  FIG. 12 is a flowchart for explaining the flow of link trace processing in the present embodiment. As shown in the figure, the CPU 10 first calls the graph drawing program 410 to display the graph screen of the mathematical formula to be processed in the first display area G1 of the LCD 1202 (step S40). In the present embodiment, since the mathematical expression to be processed is a parameter expression, a graph is displayed with the dependent variables X and Y of the parameter expression as coordinate axes.

  Next, the increase / decrease table display control program 406 is called to display the increase / decrease table screen W2 based on the increase / decrease table data 304 in the second display area G2 (step S42).

  Next, the CPU 10 displays a pointer at the left end of the displayed graph line (step S44), selects an area of the increase / decrease table corresponding to the coordinate value indicated by the pointer (step S46), and changes the display form of the area to another. It changes so that it may become a display form different from the area | region (step S48).

  Next, the X component arrow of the area selected from the increase / decrease table data 304 is referred to (step S50), and an arrow mark in the same direction as the referenced arrow is positioned at a predetermined distance above the previously displayed pointer. (Step S52). Further, referring to the arrow of the Y component in the similarly selected area (step S54), an arrow mark in the same direction as the referenced arrow is displayed at a position a predetermined distance to the right of the previously displayed pointer. (Step S56).

Specifically, for example, as shown in FIG. 13C, a graph screen W3 is displayed in the first display area G1 of the LCD 1202, and an increase / decrease table screen W2 is displayed in the second display area G2. On the graph screen W3, the coordinate axis A, the graph line L of the input mathematical formula, and the pointer P are displayed. Further, an arrow mark M1 from step S52 is displayed above the pointer P, and an arrow mark M2 from step S56 is displayed to the right.
The arrow marks M1 and M2 point in the same direction as the X component direction and the Y component direction of the increase / decrease table at the position where the pointer P is displayed. Therefore, the user can easily understand the direction of the pointer P toward each axis when the value of the parameter t is increased by simply looking at the graph display without comparing with the corresponding area of the increase / decrease table. become.

  In FIG. 12, when a predetermined operation for moving the pointer is input (step S58; NO), the CPU 10 updates the coordinate value of the pointer P according to the operation input (step S60), and moves the display position of the pointer P. (Step S62). Then, the area of the increase / decrease table corresponding to the position of the pointer P after the movement is determined from the value of the graph indicated by the position after the movement of the pointer P (step S64).

  Specifically, for example, increase / decrease of parameter t and movement of the pointer in the X-axis direction are input with the left and right direction keys of the operation input key 1204, or the pointer P is dragged with the stylus pen 1208 and the pointer P is moved. If input, the coordinate of the screen coordinate system or the coordinate of the graph coordinate system of the pointer P after movement is calculated according to the operation input, and the contents of the pointer data storage area 308R of the RAM 30 are updated. Then, it is determined from the calculated coordinates which area of the increase / decrease table contains the position of the pointer P.

  Next, the CPU 10 hides the arrow marks M1 and M2 (step S66), returns all changed display forms of the increase / decrease table to the standard state (step S68), and returns to step S48. And the display form of the area | region of the increase / decrease table determined by step S64 is changed (step S48), and the display of the arrow marks M1 and M2 is updated (steps S50-S56).

  When an operation other than the pointer operation is input (step S58; YES), the flow returns to the flow of FIG. In FIG. 10, when a predetermined operation for ending the display of the increase / decrease table is input (step S14; YES), the series of processes in the present embodiment is ended.

  As described above, according to the present embodiment, when the increase / decrease table of the parameter expressions of the variables X and Y by the parameter t is displayed, the increase / decrease tendency of the variables X and Y is indicated in the direction of the arrow that is easily associated with the image of the coordinate axis in the graph display. By showing, it is possible to easily compare and compare the increase / decrease table with the graph. Furthermore, when the parameter expression is displayed in a graph, when the parameter t is increased by displaying an arrow in the same direction as each of the increasing and decreasing trends of the variables X and Y along with the pointer displayed on the graph, It can be shown in an easy-to-understand manner to which of the axes the pointer moves. For this reason, it becomes easier for the user to read the graph of the parameter formula.

[Second Embodiment]
Next, as a second embodiment to which the present invention is applied, an example will be described in which the setting of the arrow direction in the parameter equation increase / decrease table shown in the first embodiment is applied to cases other than the parameter equation. . The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and the description of the first embodiment is referred to.

  This embodiment is basically realized by the same components as those in the first embodiment. That is, the configuration (see FIG. 1) and functional blocks (see FIG. 3) of the multifunction scientific calculator 1200 are the same as those in the first embodiment. However, the ROM 40 in the present embodiment has a similar program that is different from the increase / decrease table data creation process in the first embodiment, instead of the increase / decrease table data creation program 404 in the first embodiment. Remembered (not shown).

FIG. 14 is a flowchart for explaining the flow of the increase / decrease table data creation process in the present embodiment. As shown in the figure, the CPU 10 first determines the type of the input mathematical formula (step S20). If the input mathematical formula is not a parameter formula (step S22; NO), the root number is attached to the independent variable X in the mathematical formula. It is determined whether or not a root term (√g (X)) is included (step S70).
When it is determined that the root sign term is included (Step S70; YES), the variable X is solved with the root sign term as a parameter t (Step S72), and the root sign term (√h (t)) is included in the solution. If there is not (step S74; YES), a parameter expression having parameters t and Y, which are initially inputted, as parameters t is generated and stored in the expression data 302 (step S76). Then, as in the first embodiment, it is treated as a parameter expression, and the direction of the arrow is set (steps S24, 28, S30).

  As a result, in the present embodiment, for example, as shown in FIG. 15A, when a formula including a root sign term with a root symbol in (X + 1) is input on the formula editor screen W4, the type of formula is Even in the standard formula of Y = f (X) in the present embodiment, the increase / decrease table screen W5 is displayed as an increase / decrease table of parameter formulas by the parameter t as shown in FIG. The Incidentally, in the prior art, as shown in the increase / decrease table screen W6 in FIG. 8C, in the primary differential component f ′ (x) and the secondary differential component f ″ (x), an area that is not calculated (“Und” in the figure is displayed). Area) and the increase / decrease table becomes difficult to read.

  Therefore, according to the present embodiment, even if the type of the input mathematical formula is not a parameter formula, if it is preferable to describe the formula using the parameter formula, the initial formula is automatically replaced with the parameter formula. To display the increase / decrease table. As a result, an area that is not calculated can be eliminated, and the increase / decrease table of the mathematical expression can be displayed more easily. Needless to say, the determination as to whether or not to replace the parameter formula is not limited to the above-described conditions, and may be set as appropriate.

[Third Embodiment]
Next, as a third embodiment to which the present invention is applied, (1) a mathematical expression for displaying an increase / decrease table is designated by drag and drop, and (2) a character as a parameter is designated by drag and drop. An example of displaying an increase / decrease table by replacing a parameter formula with a parameter formula will be described.

“Drag” here refers to an operation such as touching a character string or the like displayed on the LCD 1202 with the stylus pen 1208 and moving the stylus pen 1208 as it is without releasing it from the touch panel 1203, thereby moving the sentence string or the like. Say the operation to move. “Drop” is an operation of releasing the stylus pen 1208 from the touch panel 1203 from the dragged state, and the movement destination and movement determination by dragging are thereby performed.
That is, “drag and drop” indicates a series of operations for inputting a character string or the like displayed with the stylus pen 1208 so as to move to a predetermined input field.

  This embodiment is realized by basically the same components as those of the second embodiment. That is, the configuration and functional blocks of the multi-function scientific calculator 1200 are the same as those in the second embodiment. Note that the same components as those of the second embodiment are denoted by the same reference numerals, the description thereof is omitted, and the description of the second embodiment is referred to.

  FIG. 16 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores a learning support program 400-3 in place of the learning support program 400 in the second embodiment.

FIG. 17 is a flowchart for explaining the overall processing flow in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the learning support program 400-3.
As shown in the figure, the CPU 10 first displays an expression editor screen for inputting an expression in the first display area G1 (step S2). When the user operates the operation input key 1204 to write a mathematical expression on the expression editor screen, the CPU 10 stores the mathematical expression data 302 in the RAM 30 in accordance with the operation input signal from the operation input key 1204 (step S4). A plurality of mathematical expressions may be input.

Next, the CPU 10 determines whether or not the mathematical expression displayed on the mathematical expression editor screen has been dragged and dropped within a predetermined display range. When the mathematical expression is dragged and dropped into a predetermined display range (step S80; YES), the CPU 10 sets the mathematical expression that has been dragged and dropped as a mathematical expression to be processed (step S82). Specifically, for example, a predetermined flag is set in the formula data 302 of the formula that is to be processed, and in the increase / decrease table data creation process, the formula with the flag is set as the processing target.
Then, the increase / decrease table data creation program 404-2 is called to execute the increase / decrease table data creation process (step S6), and the increase / decrease table display control program 406 is called and executed to display the increase / decrease table screen (step S8).

  FIG. 18 is a diagram illustrating an example of a screen display in the present embodiment. As shown in FIG. 5A, a copy operation is performed by dragging and dropping a mathematical expression input on the expression editor screen W7 displayed in the first display area G1 of the LCD 1202 to the input field of the common area G4 with the stylus pen 1208. (This also corresponds to the selection operation.) (Corresponding to step S80), as shown in FIG. 5B, the increase / decrease of the dragged and dropped mathematical expression is displayed on the increase / decrease table screen W8 of the second display area G2. A table is displayed.

  Next, if the increase / decrease table display process is executed and the increase / decrease table of the mathematical expression to be processed is displayed on the display unit 14 (step S8), the CPU 10 displays the increase / decrease displayed on the English characters displayed on the expression editor screen. It is determined whether or not the table is dragged and dropped (step S84).

When the displayed English character is dragged and dropped into the display range of the displayed increase / decrease table (step S84; YES), the CPU 10 determines whether or not the mathematical expression to be processed is a parameter expression (step S86). .
When it is determined that it is not a parameter expression (step S86; NO), it is determined whether or not the mathematical expression to be processed can be converted into a parameter expression (step S88). Specifically, for example, when a mathematical expression to be processed includes a root sign term of an independent variable X with a root symbol, and the root sign term is used as a parameter and the variable X is solved, the root sign term is not included in the solution. In this case, it is determined that the parameter expression can be converted.

  If it is determined that conversion is possible (step S88; YES), a parameter expression of a mathematical expression to be processed is generated using the dragged and dropped English character as a parameter, and is additionally stored in the mathematical expression data 302 (step S90). ) To be processed (step S92). Then, increase / decrease table data creation processing is executed with the generated parameter formula as a processing target (step S6).

  As a result, for example, as shown in FIG. 19A, when the English character t displayed on the expression editor screen W7 is dragged and dropped onto the increase / decrease table screen W8, as shown in the increase / decrease table screen W9 of FIG. In addition, the increase / decrease table of the formula “Y = 1−√ (X + 1)”, which was the initial processing target, is updated to the increase / decrease table of the parameter formula using the English letter t as a parameter.

  Therefore, according to the present embodiment, it is possible to make an operation of designating a mathematical expression that displays an increase / decrease table from among the inputted mathematical expressions. Also, once the increase / decrease table is displayed, simply dragging and dropping English characters onto the increase / decrease table, the conversion table is automatically converted into a parameter formula, and the convenience is improved.

[Fourth Embodiment]
Next, as a fourth embodiment to which the present invention is applied, when displaying a graph of a mathematical formula displaying an increase / decrease table, the graph coordinate range is appropriately set according to the result of the increase / decrease table and the graph is displayed. An example of optimizing is described.

  The present embodiment is realized by basically the same components as the third embodiment. That is, the configuration and functional blocks of the multi-function scientific calculator 1200 are the same as those in the third embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and the description of the first embodiment is referred to.

  FIG. 20 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores a graph drawing program 410-4 in place of the graph drawing program 410 in the third embodiment.

  FIG. 21 is a flowchart for explaining the flow of graph display processing in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the graph drawing program 410-4.

  As shown in the figure, the CPU 10 refers to the maximum and minimum values of the X component from the increase / decrease table data 304 (step S100), and sets the range of the graph data 306 so that the referred maximum and minimum values are displayed. The data 306c is changed (step S102). Specifically, for example, the maximum and minimum values referred to are 1.1 times the maximum value (maximum scale) and minimum value (minimum scale) of the X coordinate, which correspond to the maximum and minimum values of the X component. The part of the graph to be displayed is displayed.

  Next, the CPU 10 refers to the maximum and minimum values of the Y component from the increase / decrease table data 304 in the same manner as the X component (step S104), and the graph data 306 so that the referred maximum and minimum values are displayed. Range setting data 306c is changed (step S106). Specifically, for example, the maximum value and the minimum value when the graph is displayed as the maximum value and the minimum value of the Y coordinate as 1.1 times the maximum value and the minimum value, respectively, are displayed on the graph display screen. Use the full width to display.

  Next, the CPU 10 displays a graph screen in the first display area G1 of the LCD 1202. That is, in the first display area G1, coordinate axes are displayed based on the changed range setting data 306c (step S108), and graph lines are displayed (step S110).

As a result, for example, as shown in FIG. 22A, when the link trace is selected and executed from the menu bar with the stylus pen 1208, the expression editor screen W10 displayed in the first display area G1 of the LCD 1202 is displayed on the graph screen. Be changed.
When the graph is displayed, if the range setting data 306c set by default as in the past is used, the range setting is inappropriate and only a part of the graph is displayed as shown in the graph screen W12 of FIG. There may be a case where the characteristic part of the displayed graph (in this case, the part indicating the minimum value or the maximum value) is not properly displayed. In this case, the range setting must be changed manually.
However, as shown in the present embodiment, by referring to the maximum / minimum values of the axis coordinate component from the increase / decrease table data 304 prior to the graph display, the range setting is appropriately changed, so that the graph screen of FIG. As indicated by W13, a characteristic portion of the graph can be displayed in the first display area G1. In other words, according to the present embodiment, the graph of the mathematical formula displaying the increase / decrease table can be appropriately displayed with the characteristic part in one operation, so that the usability is improved.

[Fifth Embodiment]
Next, as a fifth embodiment to which the present invention is applied, a case where an increase / decrease table of mathematical expressions including undefined variables is displayed will be described.

  This embodiment is basically realized by the same components as those in the first embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the first embodiment. In addition, about the component similar to 1st Embodiment, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and the description about 1st Embodiment shall be referred.

  FIG. 23 is a diagram showing an example of mathematical formula data 302-5 stored in the mathematical formula data storage area 302R in the present embodiment. As shown in the figure, in this embodiment, it is assumed that a mathematical expression including an undefined variable a is input as a processing target. It is assumed that “a” used in the mathematical expression is defined as one of the specifications in advance to represent an undefined variable.

  FIG. 24 is a diagram showing an example of the increase / decrease table data 304-5 stored in the increase / decrease table data storage area 304R in the present embodiment. In the present embodiment, since the mathematical expression to be processed includes the undefined variable a, the increase / decrease table data 304-5 corresponds to the component 304c and the region 304d for each condition 304e that the undefined variable a can take. (For example, the X component of the area A2 is “−a”).

  FIG. 25 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment corresponds to the increase / decrease table data creation program 404-5 corresponding to the increase / decrease table data creation program 404 in the first embodiment and the increase / decrease table display control program 406 in the first embodiment. An increase / decrease table display control program 406-5 is stored.

FIG. 26 is a flowchart for explaining the flow of increase / decrease table data creation processing in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the increase / decrease table data creation program 404-5.
As shown in the figure, in the increase / decrease table data creation process according to the present embodiment, the increase / decrease table data 304-5 depends on whether or not the mathematical expression to be processed is a parameter expression, as in the first embodiment. When the arrow data to be used is set (step S28), the CPU 10 determines whether or not the undefined variable is included in the mathematical formula data 302-5 to be processed (step S130).

  When the undefined variable a is included (step S130; YES), the CPU 10 categorizes the possible values of the undefined variable a (step S132). Specifically, for example, when the undefined variable a is (a + n; n is a constant), three conditions of a <n, a = n, and a> n are set. In addition, similarly, conditions are set according to the format of the term including the undefined variable a in the mathematical expression.

  If the condition of the value that can be taken by the undefined variable a is set, then an increase / decrease table is created including the undefined variable a for each condition, and the process returns to the flow of FIG. 10 (step S134). That is, the CPU 10 stores the component 304c and the area 304d in association with each other for each possible condition 304e of the undefined variable a in the increase / decrease table data storage area 304R.

FIG. 27 is a flowchart for explaining the flow of the increase / decrease table display process in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the increase / decrease table display control program 406-5.
As shown in the figure, in the increase / decrease table display process according to the present embodiment, first, the CPU 10 determines whether or not the mathematical expression to be processed includes the undefined variable a (step S140). When the undefined variable a is included (step S140; YES), the tab 120 is overlaid and displayed in the second display area G2 of the LCD 1202 by the number of conditions of the value that the undefined variable a can take (step S142). ), The conditions of possible values of the undefined variable a are displayed in order on each tab (step S144). Then, the increase / decrease table corresponding to the tab displayed on the leftmost side is displayed in the display column with the tab (step S146).

For example, as shown in FIG. 28A, the display field with tabs includes an extended portion for displaying a headline (tab 14a, also referred to as “velo”) and a rectangular portion 14b for displaying an increase / decrease table. It is a display column provided. On the increase / decrease table screen W14 of the second display area G2, a plurality of display fields are shifted and arranged so that the rectangular portions 14b overlap each other but the tabs 14a do not overlap. When the conditions are (1) a <n (n is a constant), (2) a = n, and (3) a> n, the above conditions (in order from the leftmost tab 14a toward the right) The conditional expressions 1) to (3) are displayed in order.
In the example shown in the figure, the display column of the left tab 14a is displayed on the top surface, and the display tabs of the center tab and the right tab are displayed below the uppermost display column. Then, the conditional expressions “a <2”, “a = 2”, and “a> 2” are displayed in order from the tab on the left side, and an increase / decrease table corresponding to the condition “a <2” is displayed in the uppermost display column. Data is read from the increase / decrease table data 304-5, and the increase / decrease table is displayed.

  In FIG. 27, when the user inputs an operation for selecting a tab by tapping on any tab with the stylus pen 1208 (operation for touching the tab portion at the tip of the stylus pen 1208) (step). S148; YES), the CPU 10 determines that the tapped tab has been selected, and controls the display field with the selected tab to be displayed on the top surface (step S150). A corresponding increase / decrease table is displayed (step S152).

  For example, in FIG. 28A, when the tab “a = 2” is tapped with the stylus pen 1208, the increase / decrease table screen W14 in the second display area G2 has the display field at the top as shown in FIG. And an increase / decrease table under the condition of “a = 2” is displayed.

When it is determined that the mathematical expression does not include the undefined variable a (step S140; NO), the CPU 10 displays an increase / decrease table in the second display area G2 as in the first embodiment (step S156), and processing The target mathematical expression is displayed (step S158).
When an operation other than the tab selection operation is input (step S154; YES), the increase / decrease table display process is terminated.

  With the above processing, according to the present embodiment, an increase / decrease table can be displayed so that the mathematical expression including the undefined variable a can be switched for each condition of the value that the undefined variable a can take.

[Sixth Embodiment]
Next, as a sixth embodiment to which the present invention is applied, when a numerical example is dragged and dropped onto an increase / decrease table of a mathematical expression including an undefined variable, an increase / decrease table in which the numerical value is assigned to the undefined variable is displayed. The increase / decrease table display control device to be operated will be described.

  The present embodiment is basically realized by the same constituent elements as the fifth embodiment. That is, the configuration and functional blocks of the multi-function scientific calculator 1200 are the same as in the fifth embodiment. In addition, about the component similar to 5th Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted and the description about 5th Embodiment shall be referred.

  FIG. 29 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores a learning support program 400-6 in place of the learning support program 400 in the fifth embodiment.

FIG. 30 is a flowchart for explaining the overall processing flow in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the learning support program 400-6.
As shown in the figure, the CPU 10 displays the increase / decrease table screen of the mathematical expressions to be processed in the second display area G2 (step S8), and then is displayed on the expression editor screen displayed in the first display area G1. It is determined whether or not the displayed number has been dragged and dropped into the display range of the increase / decrease table displayed on the increase / decrease table screen (step S10; NO → S170).

  If it is determined that it has been dragged and dropped (step S170; YES), it is further determined whether or not the mathematical expression includes the undefined variable a. If it is determined that the mathematical expression includes the undefined variable a (step S172; YES), the drag & drop is performed on the undefined variable a. The numerical value of the dropped number is substituted and stored in the mathematical formula data storage area 302R, and the mathematical formula to be processed is updated (step S174).

  If the mathematical expression to be processed is updated, the process returns to step S4, the increase / decrease table data is updated (step S4), and the updated increase / decrease table screen is displayed in the second display area G2.

  FIG. 31 is a diagram showing an example of a display screen in the present embodiment. FIG. 4A shows a state in which an increase / decrease table of mathematical expressions including the undefined variable a is displayed so as to be switchable for each condition of values that the undefined variable a can take. In the display range 16a of the increase / decrease table screen W16 in the second display area G2, an increase / decrease table is displayed in a format including the undefined variable a. If the number “13.5” displayed on the expression editor screen W15 in the first display area G1 is dragged and dropped onto the display range 16a with the stylus pen 1208 (step S170; equivalent to YES). As shown in FIG. 5B, an increase / decrease table screen W17 of a mathematical formula in which the numerical value “13.5” is substituted for the undefined variable a is displayed in the second display area G2. In addition, on the increase / decrease table screen W17, a numerical formula 17a into which a numerical value is substituted is displayed.

  Therefore, according to the present embodiment, it is possible to designate a specific substitution value of the undefined variable a by a simple operation and display an increase / decrease table of the result of substitution of numerical values. Therefore, the user can easily see the actual increase / decrease table after considering the increase / decrease table for the condition of the undefined variable a.

  It should be noted that the numerical value to be assigned to the undefined variable a may be specified by an expression such as “27/2” instead of specifying the numerical value itself. In this case, the calculation result of the mathematical expression dragged and dropped after step S170 is calculated, and when a specific constant is calculated, the process proceeds to step S172.

[Seventh Embodiment]
Next, as a seventh embodiment to which the present invention is applied, an undefined variable is displayed by changing the position of the undefined variable in the displayed increase / decrease table after displaying the increase / decrease table of the mathematical formula including the undefined variable. A case will be described in which the condition of possible values of variables is changed and the increase / decrease table is displayed again.

  The present embodiment is basically realized by the same constituent elements as the sixth embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the first embodiment. Note that the same components as those in the sixth embodiment are denoted by the same reference numerals, the description thereof is omitted, and the description of the sixth embodiment is referred to.

  FIG. 32 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores an increase / decrease table display control program 406-7 in place of the increase / decrease table display control program 406-5 in the sixth embodiment.

FIG. 33 is a flowchart for explaining the flow of the increase / decrease table display processing in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the increase / decrease table display control program 406-7.
As shown in the figure, the CPU 10 first refers to the mathematical formula data 302 to determine whether or not the mathematical formula to be processed includes the undefined variable a (step S140). When it is determined that the undefined variable a is included (step S140; YES), the increase / decrease table screen corresponding to any of the conditions of the undefined variable a is displayed in the second display area G2 with reference to the increase / decrease table data 304-5. (Step S180). Specifically, for example, an increase / decrease table with the range of the smallest value among the undefined variable conditions 304e of the increase / decrease table data 304-5 may be displayed.

  Next, when an element including the undefined variable “a” displayed in the displayed increase / decrease table is dragged and dropped to another position within the range of the increase / decrease table (step S182; YES), the CPU 10 drops the position. From this, the condition of the value that the undefined variable a can take is determined (step S184). Specifically, it is determined to which area of the increase / decrease table the dropped position coordinates correspond. For example, when the element of the X component of the dropped position coordinate is a position on the right side of the display position coordinate of “2”, the condition is determined as “a> 2.”

  Next, the CPU 10 refers to the increase / decrease table data 304-5 to display an increase / decrease table corresponding to the determined condition in the second display area G2 (step S186), and operations other than the movement operation of the undefined variable a are performed. If entered (step S188; YES), the increase / decrease table display process is terminated.

  FIG. 34 is a diagram showing an example of a screen display in the present embodiment. FIG. 11A corresponds to step S180, and an increase / decrease table screen W18 including an undefined variable a is displayed in the second display area G2. Here, as shown in FIG. 6B, the element “-a” of the undefined variable a displayed on the increase / decrease table screen W18 is dragged to the right end of the increase / decrease table with the stylus pen 1208 and dropped. Since the dropped position corresponds to a position on the right side of the area where the element of the X component is “2”, the condition of the undefined variable “a” is determined as “a> 2.” Then, as shown in FIG. 9C, an increase / decrease table screen W19 corresponding to the condition “a> 2” is displayed in the second display area G2.

  Therefore, according to the present embodiment, the element including the undefined variable a in the displayed increase / decrease table is moved by a simple operation to change the condition of the undefined variable a and display the increase / decrease table under the condition. It is possible to make it easier to use.

  The movement of the element including the undefined variable “a” is not limited to drag and drop using the stylus pen 1208, but may be realized by selecting and moving the element using the operation input key 1204, or copying and pasting the element. good. Specifically, for example, an element can be selected by an operation such as a direction key, and if an element is selected, a vertical line indicating a movement destination candidate is displayed between the areas of the increase / decrease table on the increase / decrease table, and the direction key etc. The destination may be selected by the operation.

[Eighth Embodiment]
Next, as an eighth embodiment to which the present invention is applied, an increase / decrease table display control device that displays each increase / decrease table in a switchable manner when a plurality of mathematical expressions are input at once will be described.

  This embodiment is basically realized by the same components as those in the first embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and the description of the first embodiment is referred to.

  FIG. 35 is a diagram showing an example of mathematical formula data 302-8 stored in the mathematical formula data storage area 302R in the present embodiment. In the formula data 302-8, a plurality of formulas 302a and a flag 302b indicating which formula is selected are stored in association with each other. In the initial state, the flag 302b is in a state in which the first mathematical formula input first is selected (a state in which the value “1” is stored).

  FIG. 36 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores an increase / decrease table display control program 406-8 instead of the increase / decrease table display control program 406 in the first embodiment.

FIG. 37 is a flowchart for explaining the flow of the increase / decrease table display process in the present embodiment. The process described here is realized by the CPU 10 reading and executing the increase / decrease table display control program 406-8.
As shown in the figure, in the increase / decrease table display process according to the present embodiment, first, when a plurality of processing target formulas are stored in the formula data 302-8 (step S190; YES), the CPU 10 The number of display fields with tabs is displayed in an overlapping manner (step S192), and the mathematical expressions to be processed are displayed in order on each tab (step S194). Specifically, the first mathematical expression input first is displayed in order from the left tab, and then the mathematical expressions are displayed in the input order in order toward the right. Then, the increase / decrease table of the selected mathematical formula is displayed in the display column with the tab (step S196). That is, since the first mathematical expression is selected in the initial state, the first mathematical expression is displayed on the leftmost tab, and an increase / decrease table of the first mathematical expression is displayed.

  Specifically, for example, as shown in FIG. 36A, in the expression editor screen W20 in the first display area G1, the first expression “Y = X3-2X” and the second expression “Y = sin ( X) "is input as a processing target. The increase / decrease table screen W21 of the second display area G2 has a rectangular design with an extension portion (tab 21a, also referred to as “velo”) for displaying a headline and a rectangular portion 21b for displaying the increase / decrease table. A display field is displayed. The plurality of display fields are displayed while being shifted so that the tabs 21a do not overlap while the rectangular portions 21b overlap each other. In the example of the figure, the display field of the tab 21a on the left side is the uppermost surface, and the display field of the tab on the right side is the lower surface and is displayed in an invisible state. Then, the mathematical expressions “Y = X3-2X” and “Y = sin (X)” to be processed are displayed in order from the left tab, and the first mathematical expression “Y = X3-2X” is displayed in the uppermost display column. An increase / decrease table is displayed.

  Next, in FIG. 37, when an operation for selecting any tab is input by the user with the stylus pen 1208 (step S198; YES), the CPU 10 determines that the tab has been selected, and formulas for the selected tab. Is set to the selected state (step S200). Then, control is performed so that the display field with the selected tab is displayed on the top surface (step S202), and an increase / decrease table of the selected formula is displayed in the display field (step S204).

  For example, when the tab 21a “Y = sin (X)” is tapped with the stylus pen 1208 in FIG. 38A, the tab “Y = sin (X)” is attached as shown in FIG. The display field is displayed so as to be the top surface, and an increase / decrease table screen W22 of “Y = sin (X)” is displayed.

  When the numerical formula is singular (step S190; NO), the increase / decrease table is displayed in the second display area G2 as in the first embodiment (step S156), and the processing target mathematical formula is displayed (step S158). . When an operation other than the tab selection operation is input (step S154; YES), the increase / decrease table display process is terminated.

  Through the above processing, according to the present embodiment, the user can input a plurality of mathematical expressions for which the increase / decrease table is to be displayed at a time, and can switch and display each increase / decrease table with an easy operation.

[Ninth Embodiment]
Next, as a ninth embodiment to which the present invention is applied, when a plurality of mathematical expressions to be processed are input, a graph of each mathematical expression is displayed, and a graph selected from the displayed graphs is supported. A case where an increase / decrease table is displayed will be described.

  The present embodiment is basically realized by the same components as those in the eighth embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the eighth embodiment. Note that the same components as those in the eighth embodiment are denoted by the same reference numerals, the description thereof is omitted, and the description of the eighth embodiment is referred to.

  FIG. 39 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores a link trace program 408-9 in place of the link trace program 408 in the eighth embodiment.

FIG. 40 is a flowchart for explaining the flow of link trace processing in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the link trace program 408-9.
In the link trace processing according to the present embodiment, as shown in the figure, the CPU 10 calls the graph drawing program 410 to display each graph of a plurality of mathematical expressions to be processed in the first display area G1 (step S1). S210). Next, the increase / decrease table display control program 406-8 is called to display the increase / decrease table of the selected formula in the second display area G2 (step S212). In the second display area G2, a tab-equipped display field is displayed in a switchable manner so that the increase / decrease table of the selected mathematical formula is the top surface.

  Next, the CPU 10 displays a pointer at the left end of the graph line for the mathematical expression graph in the selected state (step S214), and the coordinate of the pointer is displayed in the increase / decrease table displayed in the second display area G2. The corresponding area is displayed in a different display form (for example, reverse display) from the other areas (steps S46 to S48). Further, arrow marks are displayed at predetermined positions in the vertical and horizontal directions of the pointer (steps S50 to S56).

  Here, on the graph display screen displayed in the first display area G1, when the stylus pen 1208 inputs an operation of tapping another graph line different from the graph line on which the pointer is currently displayed (step) S216; NO → S218; YES), the CPU 10 selects a mathematical expression corresponding to the selected graph (step S220). Specifically, if the tapped graph coordinate value does not satisfy the selected formula, it is determined that another graph has been selected, and only the flag 302b of the corresponding formula 302a stored in the formula data 302 is set. Stand up.

  Next, the CPU 10 displays the selected formula so that the display column of the formula becomes the top surface (step S222), and displays an increase / decrease table of the formula in the second display area G2 (step S224). Then, returning to step S214, a pointer is displayed on the graph line of the selected mathematical expression, and in the increase / decrease table displayed in the second display area G2, the area corresponding to the coordinates of the pointer is different from the other areas. It is displayed in a display form (for example, reverse display) (steps S46 to S48). Further, arrow marks are displayed at predetermined positions in the vertical and horizontal directions of the pointer (steps S50 to S56). If a predetermined process for ending the link trace is input (step S226; YES), the CPU 10 ends the link trace process.

  FIG. 41 is a diagram illustrating an example of a screen display in the present embodiment. FIG. 6A shows a plurality of mathematical formulas “Y = X3-2X” and “Y = sin (X)” which are input on the formula editor screen W23 which is a formula input screen. The increase / decrease table screen W24 of “Y = X3-2X” is displayed (corresponding to step S8 in the present embodiment). On the increase / decrease table screen W24, a display field having a tab 24a and a rectangular portion 24b is displayed. The plurality of display fields are displayed while being shifted so that the tabs 24a do not overlap while the rectangular portions 24b overlap each other. In the example of the figure, the display field of the left tab 24a is the top surface, and the display field of the right tab is the bottom surface and is displayed in an invisible state. Then, the formulas “Y = X3-2X” and “Y = sin (X)” to be processed are displayed in order from the left tab, and an increase / decrease table of “Y = X3-2X” is displayed in the uppermost display field 24b. ing.

  Here, when a predetermined operation is input with the stylus pen 1208, link trace processing is executed. When the link trace process is executed, the first display area G1 includes a graph line L1 of “Y = X3-2X” and a graph of “Y = sin (X)”, as shown in FIG. A graph screen W25 on which the line L2 is drawn is displayed. On the graph screen W25, a pointer P is displayed on the graph line L1, and arrow marks M1 and M2 are displayed (corresponding to step S56).

  In this state, on the increase / decrease table screen W24 of the second display area G2, the stylus pen 1208 touches the graph line L2 of “Y = sin (X)” in the same manner as in the eighth embodiment. When selected, an increase / decrease table screen W26 of the mathematical formula corresponding to the selected graph is displayed in the second display area G2, and a pointer P is displayed on the graph line L2 of the mathematical formula, as shown in FIG.

  Through the above processing, according to the present embodiment, when a plurality of mathematical expressions for which the increase / decrease table is to be displayed are input and the increase / decrease table and the graph are displayed simultaneously, the mathematical expression is selected by an easy operation and the graph Can be switched. It is not necessary to re-enter the mathematical expression to display the increase / decrease table and graph of different mathematical expressions, and the usability is improved.

[Tenth embodiment]
Next, as a tenth embodiment to which the present invention is applied, a case where a plurality of input mathematical expressions are displayed in one increase / decrease table will be described.

  This embodiment is basically realized by the same components as those in the first embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the first embodiment. In addition, about the component similar to 1st Embodiment, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and the description about 1st Embodiment shall be referred.

  FIG. 42 is a diagram illustrating an example of mathematical formula data 302-10 stored in the mathematical formula data storage area 302R in the present embodiment. As shown in the figure, in this embodiment, it is assumed that a plurality of mathematical expressions having the same independent variable X are stored.

  FIG. 43 is a diagram showing an example of the increase / decrease table data 304-10 stored in the increase / decrease table data storage area 304R in the present embodiment. As shown in the figure, the increase / decrease table data 304-10 includes a plurality of mathematical formulas stored in the mathematical formula data 302-10, but the component 304c and the region 304d are not stored in association with each mathematical formula, The component 304c and the area 304d are stored in association with each other as a common increase / decrease table. That is, in the increase / decrease table data 304-10, the dependent variable X common to the mathematical formulas stored in the mathematical formula data 302-10 is used as a common component, and the component 304c and the region 304d of each formula are stored in association with each other. Here, what is characteristic is that predetermined display data (black circles in the figure) is stored in components that are not related to each other from the viewpoint of one mathematical expression.

  FIG. 44 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores an increase / decrease table data creation program 404-10 instead of the increase / decrease table data creation program 404 in the first embodiment.

  FIG. 45 is a flowchart for explaining the flow of the increase / decrease table data creation process in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the increase / decrease table data creation program 404-10.

  In the increase / decrease table data creation process in the present embodiment, as shown in the figure, the CPU 10 first determines whether or not there are a plurality of mathematical expressions to be processed (step S230). If there are a plurality of mathematical expressions to be processed (step S230; YES), it is further determined whether or not the independent variables X of these mathematical expressions are common (step S232). For example, if mathematical expressions are described with the same character type, it is determined that they are common.

  When the independent variables are common (step S232; YES), the CPU 10 calculates the X component of the increase / decrease table for all the mathematical expressions to be processed (step S234), sorts the calculated X components, and creates one shared increase / decrease table. The area 304d is sequentially set (step S236).

  Next, the CPU 10 calculates each component of the increase / decrease table for each of the plurality of mathematical expressions (step S238). Specifically, for example, when Y = f (X) and Y = g (X) are mathematical expressions to be processed, f (X) and f ′ (X) and g (X) and g ′ (X) For each component 304c, the component of the area 304d is calculated, and stored in association with one shared increase / decrease table area 304d.

  Next, predetermined display data is set for components not related to one of the mathematical expressions (step S240). The predetermined display data is data of a display body that is known to be different from characters, numbers, and symbols used in the normal increase / decrease table. For example, blanks, circles, diagonal lines, and the like may be set as appropriate.

  FIG. 46 is a diagram showing an example of a screen display in the present embodiment. As shown in the figure, in the expression editor screen W27 in the first display area G1, a plurality of mathematical expressions “Y = X3-2X” and “Y = sin (X)” are input, but the independent variable X is Since they are common, an increase / decrease table screen W28 of one shared increase / decrease table is displayed in the second display area G2. The user can compare the increasing / decreasing tendency of a plurality of mathematical expressions at once on the increase / decrease table screen W28.

  As described above, according to the present embodiment, by displaying a plurality of mathematical expressions having the same independent variable in a single increase / decrease table, it is possible to reduce the troublesomeness of the display switching and to facilitate the comparative study, thereby improving the learning effect. Can be increased.

  The application of this embodiment is not limited to the case where the characters of the independent variables used in the mathematical formula are the same, and it is displayed as a common increase / decrease table on the assumption that the characters are the same even if different characters are used. It is good also as composition to do. In that case, when different characters are used instead of step S230, a step is provided for selecting whether to display the increase / decrease table separately or as a common increase / decrease table, and the user arbitrarily selects Make it possible.

[Eleventh embodiment]
Next, as an eleventh embodiment to which the present invention is applied, an example in which a graph in a range desired by a user can be displayed by specifying a range to be displayed as a graph on the displayed increase / decrease table will be described.

  This embodiment is basically realized by the same components as those in the first embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and the description of the first embodiment is referred to.

  FIG. 47 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores a link trace program 408-11 instead of the link trace program 408 in the first embodiment.

FIG. 48 is a flowchart for explaining the flow of link trace processing in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the link trace program 408-11.
In the link trace process according to the present embodiment, when the link trace process is executed, the CPU 10 calls the graph drawing program 410 to display a graph of the mathematical expression to be processed in the first display area G1 (step S40). Next, the increase / decrease table display control program 406 is called to display the increase / decrease table of the mathematical expression to be processed in the second display area G2 (step S42).

  Next, the CPU 10 displays a pointer at the left end of the graph line for the displayed graph (step S44), and corresponds to the coordinates of the pointer in the increase / decrease table displayed in the second display area G2. The area is displayed in a different display form from the other areas (steps S46 to S48). Further, arrow marks are displayed at predetermined positions in the vertical and horizontal directions of the pointer (steps S50 to S56).

  Here, in the increase / decrease table displayed in the second display area G2, when an operation for designating a range is input (step S250; NO → S252; YES), the maximum for each of the X component and Y component in the designated range. The value and the minimum value are calculated (step S254), and the graph coordinate axis range setting data 306c is updated from the calculated values (step S256). Then, the graph is redrawn in the updated range (step S258). Then, the process returns to step S44.

  FIG. 49 is a diagram showing an example of a screen display in the present embodiment. FIG. 6A shows a screen corresponding to the first step S56 after the link trace process is executed. As shown in the figure, in the first display area G1, a graph screen W29 is displayed according to the default range setting, and an increase / decrease table screen W30 is displayed in the second display area G2.

  FIGS. 5B to 5C show examples of operations for specifying a range in the increase / decrease table displayed in the second display area G2. As shown in the figure, when an operation is performed to touch the portion of the increase / decrease table displayed with the stylus pen 1208, the area of the increase / decrease table is surrounded by a line 30a. It shows that the area surrounded by the line 30a is selected. When the stylus pen 1208 is slid (dragged) while touched, the display area of the increase / decrease table changes according to the sliding direction, and the line 30a is deformed along with the sliding, so that the selection range is desired. Can be specified as: For example, when the stylus pen 1208 is slid in the right direction on the screen from the state shown in FIG. 5B, the increase / decrease table displayed on the increase / decrease table screen W30 slides to the left as shown in FIG. Accordingly, the range surrounded by the line 30a is enlarged toward the right. If the desired area is surrounded by the line 30a, an operation of releasing the stylus pen 1208 is performed. If the stylus pen 1208 is separated, the selection range is determined and input (corresponding to step S252).

  If a selection range is input, the graph coordinate range is updated based on the maximum and minimum values of the X and Y components in the selection range. Specifically, for example, the maximum value and the minimum value of the coordinate axes for displaying 1.1 times the maximum value and 1.1 times the minimum value, respectively. Then, based on the updated graph coordinate range setting, the graph screen W31 of the previously selected range portion is displayed in the first display area G1, as shown in FIG.

  Therefore, according to the present embodiment, the graph of the desired range of the increase / decrease table can be displayed on the full screen, so that the place of interest can be displayed in more detail, and the learning effect can be enhanced.

[Twelfth embodiment]
Next, as a twelfth embodiment to which the present invention is applied, an example in which a process for obtaining an increase / decrease table component is displayed will be described.

  This embodiment is basically realized by the same components as those in the first embodiment. That is, the configuration and functional blocks of the multifunction scientific calculator 1200 are the same as those in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and the description of the first embodiment is referred to.

  FIG. 50 is a diagram showing an example of the configuration of the storage area of the RAM 30 in the present embodiment. As shown in the figure, the RAM 30 of the present embodiment includes a differential expression data storage area 314R, and stores differential expressions calculated when calculating an increase / decrease table of mathematical expressions and data of the solutions.

  FIG. 51 is a diagram showing an example of the configuration of differential data 314 stored in the differential data storage area 314R in the present embodiment. As shown in the figure, the differential equation data 314 includes (1) a primary differential equation 314a for storing a primary differential equation obtained from a mathematical expression to be processed, and (2) a root of the primary differential equation. A primary differential equation root 314b to be stored; (3) a primary differential equation denominator solution 314c that is a solution in which the denominator of the primary differential equation = 0; (5) a secondary differential root 314e for storing the root of the secondary differential formula, and (6) a denominator of the secondary differential formula = 0. The secondary differential equation denominator solution 314f is stored.

  FIG. 52 is a diagram showing an example of the configuration of the storage area of the ROM 40 in the present embodiment. The ROM 40 in the present embodiment stores an increase / decrease table data creation program 404-12 in place of the increase / decrease table data creation program 404 in the first embodiment.

FIG. 53 is a flowchart for explaining the flow of the increase / decrease table data creation process in the present embodiment. The processing described here is realized by the CPU 10 reading and executing the increase / decrease table data creation program 404-12.
In the increase / decrease table data creation process in the present embodiment, as shown in the figure, first, the first-order differential expression of the mathematical expression Y = f (X) to be processed is calculated and stored in the differential expression data storage area 314R ( In step S300, the graph drawing program 410 is called to display a first-order differential expression graph in the first display area G1 (step S302). Next, the root of the primary differential expression is calculated and stored in the differential expression data storage area 314R (step S304), the denominator of the primary differential expression is calculated (step S306), and the solution of denominator = 0 is calculated. It stores in the differential expression data storage area 314R (step S308).

Next, the CPU 10 controls the display so that the pointer is displayed at the left end of the graph line of the first-order differential expression previously displayed (step S310), and the pointer is moved from the left end toward the right end (step S312).
When the graph coordinate value indicated by the pointer coincides with the root of the first-order differential expression or the solution where the denominator of the first-order differential expression = 0 (step S314; YES), the X value of the graph coordinate value is displayed (step In step S316, the pointer is stopped at the position for a predetermined time (step S318). The processes in steps S312 to S318 are repeated until the pointer reaches the right end of the graph line of the first-order differential equation (step S320; NO).

  If the pointer has moved until it reaches the right end of the graph line of the primary differential expression (step S320; YES), then the CPU 10 calculates the secondary differential expression of the mathematical expression to be processed and stores it in the differential expression data storage area 314R. Then (step S322), the graph drawing program 410 is called to display a second-order differential expression graph in the first display area G1 (step S324). Next, the root of the secondary differential expression is calculated and stored in the differential expression data storage area 314R (step S326). Further, the denominator of the secondary differential equation is calculated (step S328), and the solution of denominator = 0 is calculated and stored in the differential equation data storage area 314R (step S330).

Next, the CPU Y10 displays a pointer at the left end of the graph line of the second-order differential expression previously displayed (step S332), and performs display control so as to move the pointer from the left end toward the right end (step S334).
When the graph coordinate value indicated by the pointer coincides with the root of the secondary differential equation or the solution where the denominator of the secondary differential equation = 0 (step S336; YES), the X value of the graph coordinate value is displayed (step In step S338, the pointer is stopped at the position for a predetermined time (step S340). The processes in steps S334 to S340 are repeated until the pointer reaches the right end of the graph line of the second order differential expression (step S343; NO).

  If the pointer moves until it reaches the right end of the graph line of the primary differential expression (step S342; YES), the CPU 10 creates the increase / decrease table data 304 based on the differential expression data 314 (step S344), and the increase / decrease table data End the creation process.

54 to 55 are diagrams showing examples of screen display in the present embodiment.
FIG. 54A shows a state in which a mathematical expression for displaying an increase / decrease table is input on the formula editor screen W33. The inputted mathematical formula is stored as mathematical formula data 302 in the mathematical formula data storage area 302R. If a mathematical expression is input, as shown in FIG. 54 (b), a primary differential graph screen W35 of the mathematical formula input in the first display area is displayed, and the pointer P is on the graph line L3 of the primary differential expression. Is displayed to move from the left end to the right end.

  As shown in FIG. 54 (c), the moving pointer P intersects the X coordinate axis, and the graph coordinate value indicated by the pointer P coincides with the root of the first-order differential expression. Therefore, the pointer P stops on the spot for a predetermined time. Then, the graph coordinate value 35a at that time is displayed (corresponding to steps S316 to S318). When the predetermined time has elapsed, as shown in FIG. 54 (d), the pointer P is again displayed so as to move toward the right end of the graph line L3, and again stops at a position intersecting the X axis A3 for a predetermined time, The graph coordinate value at that time is displayed.

  When the pointer P reaches the right end of the graph line L3 of the primary differential expression, as shown in FIG. 55 (a), the secondary differential expression graph screen W36 of the mathematical formula input to the first display area G1 is displayed. The pointer P is displayed so as to move on the graph line L4 of the second-order differential expression from the left end toward the right end (corresponding to step S334).

  As shown in FIG. 55 (b), the moving pointer P intersects with the X coordinate axis A4, and the graph coordinate value indicated by the pointer P coincides with the root of the secondary differential expression. The operation stops, and the graph coordinate value 36a at that time is displayed (corresponding to steps S338 to S340). When the predetermined time has elapsed, the pointer P is again displayed so as to move toward the right end of the graph line L3. When the pointer P reaches the right end of the graph line L4 of the second-order differential expression, as shown in FIG. 55 (c), the graph line L5 of the input mathematical formula is displayed in the first display area G1. A graph screen W37 is displayed, and an increase / decrease table screen W38 is displayed in the second display area G2.

  In this way, by displaying the series of screens shown in FIGS. 54 to 55, it is possible to show the user the process of creating an increase / decrease table of mathematical expressions while displaying the graph. More preferably, only the elements of the increase / decrease table are displayed in the second display area G2, and while the primary differential expression graph is displayed, the element part of the primary differential expression is highlighted and the secondary differential expression is displayed. It is good also as a structure which reverse-displays the element part of a secondary differential expression, while displaying the graph of a type | formula. Furthermore, while displaying the first-order differential expression graph, the first-order differential expression is displayed on the screen, and while the second-order differential expression graph is displayed, the second-order differential expression is displayed on the screen. Displaying this is preferable because the process becomes clearer.

  In addition, the movement of the pointer P is automatically executed. For example, the steps S312 and S334 are set as steps in which the user manually moves the operation input key 1204 or the stylus pen 1208, and the user moves while considering the movement. Of course, you may be able to do.

  The first to twelfth embodiments to which the present invention is applied have been described above. However, the application of the present invention is not limited to these embodiments, and additional components may be added as appropriate without departing from the spirit of the invention. Of course, it is possible to delete or change.

The figure which showed an example of the structure in 1st Embodiment. The figure for demonstrating the structure of the display screen of LCD in 1st Embodiment. The functional block diagram which shows an example of a function structure of the multifunctional scientific calculator in 1st Embodiment. The figure which shows an example of a structure of the storage area of RAM in 1st Embodiment. The figure which shows an example of the formula data memorize | stored in the formula data storage area in 1st Embodiment. The figure which shows an example of the increase / decrease table data memorize | stored in the increase / decrease table data storage area in 1st Embodiment. The figure which shows an example of the graph data memorize | stored in the graph data storage area in 1st Embodiment. The figure which shows an example of a structure of the storage area of ROM in 1st Embodiment. The figure which shows an example of the arrow TBL in 1st Embodiment. The flowchart for demonstrating the flow of the whole process in 1st Embodiment. The flowchart for demonstrating the flow of the increase / decrease table data creation process in 1st Embodiment. The flowchart for demonstrating the flow of the link trace process in 1st Embodiment. The figure which shows the example of the screen display in 1st Embodiment. The flowchart for demonstrating the flow of the increase / decrease table data creation process in 2nd Embodiment. The figure which shows the example of the screen display in 2nd Embodiment. The figure which shows an example of a structure of the storage area of ROM in 3rd Embodiment. The flowchart for demonstrating the flow of the whole process in 3rd Embodiment. The figure which shows the example of the screen display in 3rd Embodiment. The figure which shows the example of the screen display in 3rd Embodiment. The figure which shows an example of a structure of the storage area of ROM in 4th Embodiment. The flowchart for demonstrating the flow of the graph display process in 4th Embodiment. The figure which shows the example of the screen display in 4th Embodiment. The figure which shows an example of the numerical formula data memorize | stored in the numerical formula data storage area in 5th Embodiment. The figure which shows an example of the increase / decrease table data memorize | stored in the increase / decrease table data storage area in 5th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 5th Embodiment. The flowchart for demonstrating the flow of the increase / decrease table data creation process in 5th Embodiment. The flowchart for demonstrating the flow of the increase / decrease table display process in 5th Embodiment. The figure which shows the example of the screen display in 5th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 6th Embodiment. The flowchart for demonstrating the flow of the whole process in 6th Embodiment. The figure which shows the example of the display screen in 6th Embodiment. The figure which shows an example of a structure of the storage area of ROM40 in 7th Embodiment. The flowchart for demonstrating the flow of the increase / decrease table display process in 7th Embodiment. The figure which shows the example of the screen display in 7th Embodiment. The figure which shows an example of numerical formula data memorize | stored in the numerical formula data storage area in 8th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 8th Embodiment. The flowchart for demonstrating the flow of the increase / decrease table display process in 8th Embodiment. The figure which shows the example of the screen display in 8th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 9th Embodiment. The flowchart for demonstrating the flow of the link trace process in 9th Embodiment. The figure which shows the example of the screen display in 9th Embodiment. The figure which shows an example of the numerical formula data memorize | stored in the numerical formula data storage area in 10th Embodiment. The figure which shows an example of the increase / decrease table data memorize | stored in the increase / decrease table data storage area in 10th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 10th Embodiment. The flowchart for demonstrating the flow of the increase / decrease table data creation process in 10th Embodiment. The figure which shows the example of the screen display in 10th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 11th Embodiment. The flowchart for demonstrating the flow of the link trace process in 11th Embodiment. The figure which shows the example of the screen display in 11th Embodiment. The figure which shows an example of a structure of the storage area of RAM in 12th Embodiment. The figure which shows an example of a structure of the differential expression data memorize | stored in the differential expression data storage area in 12th Embodiment. The figure which shows an example of a structure of the storage area of ROM in 12th Embodiment. The flowchart for demonstrating the flow of the increase / decrease table data creation process in 12th Embodiment. The figure which shows the example of the screen display in 12th Embodiment. The figure which shows the example of the screen display in 12th Embodiment.

Explanation of symbols

30 RAM
302 Formula data 304 Increase / decrease table data 304e Undefined variable condition 306 Graph data 314 Differential data 40 ROM
400 Learning support program 402 Formula input program 404 Increase / decrease table data creation program 406 Increase / decrease table display control program 408 Link trace program 412 Arrow TBL
G1 1st display area G2 2nd display column L Graph line M1, M2 Arrow mark P Pointer

Claims (3)

Formula input means for inputting a formula,
A parameter expression generating means for generating a parameter expression of the mathematical expression with the root sign term as a parameter , when the configuration of the independent variable term of the inputted mathematical expression is a root sign term ;
Increase / decrease table display control means for performing control to display the increase / decrease table of the parameter formula generated by the parameter formula generation means as the increase / decrease table of the input mathematical formula,
Increase / decrease table display control device. The decrease table display control means, if the copying operation of the equation is made on a predetermined screen display area, increase or decrease guide display control apparatus according to claim 1, wherein the means for displaying an increase or decrease table of the equations. On the computer,
Formula input function to input formula,
A parameter expression generating function for generating a parameter expression of the mathematical expression using the root sign term as a parameter when the configuration of the independent variable term of the input mathematical expression is a root sign term ;
Increase / decrease table display control function for performing control to display the increase / decrease table of the parameter formula generated by the parameter formula generation function as the increase / decrease table of the input mathematical formula,
A program to realize

Images