Abstract: A graph display apparatus includes a display unit and a processor. The display unit includes a display screen. The processor performs following processes of: determining an expression as a graph display object according to positions on the display screen, the positions being designated by a user; generating an operation receiver for changing a numerical value of a coefficient included in the determined expression, according to an operation of the user; displaying the graph of the determined expression and the generated operation receiver on the display screen; and changing the graph displayed on the display screen, according to the operation of the user on the displayed operation receiver.

Abstract: A graph display apparatus includes a display unit and a processor. The display unit includes a touch panel. The processor performs the following processes: controlling the display unit to display a graph on a graph display area in a coordinate range, the graph corresponding to an expression; acquiring a position designated by a touch of a user on the graph display area; and when a drag operation is detected after the touch of the user ends, changing the coordinate range with the designated position fixed in response to the drag operation, thereby reducing or enlarging the graph, and controlling the display unit to display the reduced or enlarged graph.

Abstract: A graph display apparatus includes a display unit and a processor. The display unit includes a touch panel. The processor performs the following processes: controlling the display unit to display a graph on a graph display area in a coordinate range, the graph corresponding to an expression; acquiring a position designated by a touch of a user on the graph display area; and when a drag operation is detected after the touch of the user ends, changing the coordinate range with the designated position fixed in response to the drag operation, thereby reducing or enlarging the graph, and controlling the display unit to display the reduced or enlarged graph.

Abstract: A graph display control device includes a formula display control unit, a graph display control unit and an operation-display-element display control unit. The formula display control unit displays a plurality of function formulas containing parameters on a display unit. The graph display control unit displays a graph image corresponding to one of the plurality of function formulas displayed by the formula display control unit, on the display unit so as to be discriminable according to the plurality of function formulas. The operation-display-element display control unit discriminately displays an operation display element for designating a numerical value of a parameter contained in at least one of the plurality of function formulas, on the display unit in correspondence to the graph images respectively displayed discriminately in relation to the function formulas by the graph display control unit.

Abstract: A formula display control device includes a display unit, a text display control unit, a formula designation unit, a template formula generation unit and a template formula display control unit. The text display control unit displays text including a formula on the display unit. The formula designation unit designates the formula in the text displayed on the display unit in response to a user operation. The template formula generation unit replaces a coefficient portion in the formula with an input frame to generate a template formula when a coefficient is included in the designated formula. The template formula display control unit displays the template formula generated by the template formula generation unit as text which is displayed on the display unit.

Abstract: A graph display apparatus includes a display unit and a processor. The display unit includes a touch panel. The processor performs the following processes: controlling the display unit to display a graph on a graph display area in a coordinate range, the graph corresponding to an expression; acquiring a position designated by a touch of a user on the graph display area; and when a drag operation is detected after the touch of the user ends, changing the coordinate range with the designated position fixed in response to the drag operation, thereby reducing or enlarging the graph, and controlling the display unit to display the reduced or enlarged graph.

Abstract: A graph display apparatus includes a display unit and a processor. The display unit includes a display screen. The processor performs following processes of: determining an expression as a graph display object according to positions on the display screen, the positions being designated by a user; generating an operation receiver for changing a numerical value of a coefficient included in the determined expression, according to an operation of the user; displaying the graph of the determined expression and the generated operation receiver on the display screen; and changing the graph displayed on the display screen, according to the operation of the user on the displayed operation receiver.

Abstract: A graph display control apparatus includes a processor. The processor operations including: storing a function equation in a memory; displaying a graph corresponding to the stored function equation on a coordinate system of a display; designating a plurality of points on the displayed graph in response to user's operations; obtaining a slope value of a tangent to the displayed graph at each coordinate corresponding to each of the plurality of designated points; plotting the corresponding slope values as one value of a coordinate on the coordinate system; performing regression calculation based on the plurality of plotted points to obtain a regression function equation of a graph corresponding to the plurality of plotted points; and displaying a graph corresponding to the regression function equation obtained by the regression calculation on the display.

Abstract: A graph display control device includes a formula display control unit, a graph display control unit and an operation-display-element display control unit. The formula display control unit displays a plurality of function formulas containing parameters on a display unit. The graph display control unit displays a graph image corresponding to one of the plurality of function formulas displayed by the formula display control unit, on the display unit so as to be discriminable according to the plurality of function formulas. The operation-display-element display control unit discriminately displays an operation display element for designating a numerical value of a parameter contained in at least one of the plurality of function formulas, on the display unit in correspondence to the graph images respectively displayed discriminately in relation to the function formulas by the graph display control unit.

Abstract: In a display apparatus, a processor performs an information storing process of storing the displayed information to be correlated with the locus of the handwriting recognized by the recognition process in the memory, when it is determined by the handwriting position determining process that the locus of the handwriting position is superposed on the information which is displayed on the display unit, and an information output process of reading and outputting the information, which is stored in the memory to be correlated with the handwritten locus recognized by the recognition process by the information storing process, when it is determined by the handwriting position determining process that the locus of the handwriting position is not superposed on the information which is displayed on the display unit.

Abstract: A formula display control device includes a display unit, a text display control unit, a formula designation unit, a template formula generation unit and a template formula display control unit. The text display control unit displays text including a formula on the display unit. The formula designation unit designates the formula in the text displayed on the display unit in response to a user operation. The template formula generation unit replaces a coefficient portion in the formula with an input frame to generate a template formula when a coefficient is included in the designated formula. The template formula display control unit displays the template formula generated by the template formula generation unit as text which is displayed on the display unit.

Abstract: An electronic apparatus includes: a display device; and a processor configured to: display a graph corresponding to a function formula on the display device, wherein a coefficient of a term included in the function formula comprises a variable; determine a numeric value range of numeric values which are to be inputted to the variable, based on a degree of the term and a display state of the graph; generate an operation receiver for allowing a user to variably specify a numeric value within the determined numeric value range; display the operation receiver on the display device. When a numeric value is specified within the numeric value range through the operation receiver, the processor displays a graph corresponding to a function formula in which the specified numeric value is inputted to the variable on the display device.

Abstract: An electronic calculator is very useful for learning manipulation procedure to perform a predetermined process by designating a position on a display screen of the calculator. Manipulation is executed on a touch screen 16a of the display screen with a touch pen. When a function expression is entered to execute a process for displaying a graphic, a position and content of manipulation in each manipulating process are previously recorded in an external recording medium 13 in association with the order of manipulation. Thereafter, the position and content of manipulation are read from the external recording medium 13 every manipulation to display the position of manipulation and a mark indicating the content of the manipulation, thereby instructing manipulation to be executed. When touch manipulation is executed as instructed, a process is performed to enter the function expression and display a graphic, and manipulation to be executed in the following order of manipulation is displayed on the display screen.

Abstract: In a display apparatus, a processor performs an information storing process of storing the displayed information to be correlated with the locus of the handwriting recognized by the recognition process in the memory, when it is determined by the handwriting position determining process that the locus of the handwriting position is superposed on the information which is displayed on the display unit, and an information output process of reading and outputting the information, which is stored in the memory to be correlated with the handwritten locus recognized by the recognition process by the information storing process, when it is determined by the handwriting position determining process that the locus of the handwriting position is not superposed on the information which is displayed on the display unit.

Abstract: A programmable calculator includes: a display unit; a calculation processing section configured to perform calculation processing; a calculation screen display control section configured to control the display unit to display a calculation screen; a base state setting section configured to set, as a base state, a calculation state; a base state storing section configured to store the base state that is set together with the calculation screen corresponding to the base state; an operation pattern storing section configured to store an operation pattern of a series of user operations that are input after the base state was set by the base state setting section; and a guide display control section configured to control the display unit to display a calculation screen corresponding to the arbitrary base state stored in the base state storing section, and to display, as guide indications, the stored operation pattern.

Abstract: A programmable calculator includes: a display unit; a calculation processing section configured to perform calculation processing; a calculation screen display control section configured to control the display unit to display a calculation screen; a base state setting section configured to set, as a base state, a calculation state; a base state storing section configured to store the base state that is set together with the calculation screen corresponding to the base state; an operation pattern storing section configured to store an operation pattern of a series of user operations that are input after the base state was set by the base state setting section; and a guide display control section configured to control the display unit to display a calculation screen corresponding to the arbitrary base state stored in the base state storing section, and to display, as guide indications, the stored operation pattern.

Abstract: An electronic calculator is very useful for learning manipulation procedure to perform a predetermined process by designating a position on a display screen of the calculator. Manipulation is executed on a touch screen 16a of the display screen with a touch pen. When a function expression is entered to execute a process for displaying a graphic, a position and content of manipulation in each manipulating process are previously recorded in an external recording medium 13 in association with the order of manipulation. Thereafter, the position and content of manipulation are read from the external recording medium 13 every manipulation to display the position of manipulation and a mark indicating the content of the manipulation, thereby instructing manipulation to be executed. When touch manipulation is executed as instructed, a process is performed to enter the function expression and display a graphic, and manipulation to be executed in the following order of manipulation is displayed on the display screen.