JPH0330054A - Document processor - Google Patents

Abstract

PURPOSE:To facilitate the control executed by an operator by executing the control so that a space exists in the end of a character/symbol-string to which a specific symbol is added at the time of a mathematical expression input mode, and inhibiting a space display in other mode than the mathematical expression input mode. CONSTITUTION:A character and a symbol which are inputted are displayed on a display device such as a CRT, etc. When a mathematical expression input mode for inputting a mathematical expression is selected, an under-cursor is used, and a surplus space is displayed in the end of each mathematical expression term. (The upper limit and the lower limit of an integral symbol, the inside of a square root symbol, a numerator and a denominator of a fraction, and the end of the upper part and the lower part of SIGMA), it is a space which exists in order to add a numerical value, etc., afterward to the end of each mathematical expression term which is inputted. The last space of the mathematical expression term which becomes necessary at the time of its input is displayed in an input window, and when it is outputted to the inside of a document screen, it is suppressed in a lump. In such a way, even at the time of inputting the mathematical expression, the control by an operator can be executed easily by using the same regular cursor.

Description

[Detailed description of the invention]

[Field of Industrial Application] The present invention relates to a document processing device that is capable of performing advanced mathematical input and editing processing on a document editing screen using mathematical symbols. [Prior Art] In conventional document processing devices such as Japanese word processors, it is required to create documents that contain both text and mathematical formulas. I tended to use it.

[Problem to be solved by the invention]

In the above-mentioned conventional document processing devices, the cursor shape changes during document input and mathematical expression input, so when switching from document input to mathematical expression input, the cursor shape changes drastically, making it difficult for the operator to see and inputting data. There were problems such as confusion when confirming the location. Furthermore, when a vertical bar cursor is used, a problem arises in that the current input character width mode, which can normally be easily confirmed by the size of the cursor, becomes difficult to understand. Furthermore, it is troublesome for the designer to design the processing/control system to enable two types of cursor display. SUMMARY OF THE INVENTION An object of the present invention is to provide a document processing device that can solve the above problem by using the same under cursor while inputting mathematical expressions as when inputting documents. [A Thousand Steps to Solve the Problem] The present invention provides an input means for inputting characters and symbols, a display means for displaying the characters and symbols input by the input means,
an input mode selection means for selecting an input mode including a formula input mode for inputting a formula; and when a formula input mode is selected by the input mode selection means, displaying a specific symbol on the display means; When inputting a character/symbol string to which the symbol is added, the space for sequentially inputting and displaying the character/symbol string to which the symbol is added is controlled so that it exists at the end of the character/symbol string to which the symbol is added, and the input display is performed using the mathematical input mode. and display control means for suppressing display of the space when a mode other than the mathematical expression input mode is selected by the input mode selection means. In another aspect of the present invention, there is provided an input means for inputting characters/symbols, a display means for displaying the characters/symbols inputted by the input means, and an instruction cursor for indicating the characters/symbols on the display means. , an input mode selection means for selecting an input mode including a formula input mode for inputting a formula, and when the formula input mode is selected by the input mode selection means, the input mode displayed on the display means. When a specific symbol or a character/symbol string to which the symbol is added is indicated by the instruction cursor, a space for sequentially inputting and displaying the characters/symbol string to which the symbol is added is provided. The space is controlled to exist at the end of the character/symbol string, and when a mode other than the formula input mode is selected by the input mode selection means after the input is displayed in the formula input mode, the display of the space is suppressed and displayed. and display control means. [Function] In the document processing device of the present invention, the same cursor as that used when inputting documents is used when inputting mathematical formulas, and a space for input is attached to the mathematical formulas on the window display, and the formulas are displayed on the document screen. When displayed, X=Nino [Example] Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a document processing device that is an embodiment of the present invention. 1 is a CPU (microprocessor) as a central processing unit, which performs calculations and logical judgments for character processing and mathematical formula processing. Reference numeral 2 denotes a ROM (read-only memory) used as a control memory, which includes a control program according to the flowcharts shown in FIGS. 23 to 33 for screen display processing when inputting mathematical formulas, mathematical formula editing processing, etc. C.P.
Various control procedures performed by the UI are stored in advance. 3 is a writable RAM (Random Access Memory), which is used to execute the control procedures stored in ROM 2, as well as to temporarily store various data provided from each component, and to perform calculations and operations of CPU 1. It is used as working memory in logical judgment. 4 is a keyboard for inputting characters, and this keyboard 4
Various keys for giving commands to the CPU 1 are also arranged on the top, as will be described later with reference to FIG. A keyboard controller 5 executes key code conversion processing (conversion into internal codes) for symbols input from the keyboard 4. Reference numeral 6 denotes a buffer memory for document creation and editing, which stores key codes input from the keyboard 4 as character codes. 7 is a CRT (cathode ray tube), which is a display device for displaying characters and mathematical formulas entered from the keyboard 4 and for displaying a cursor at a specified position. In this embodiment, a CRT is used as the display device, but a liquid crystal display or the like may also be used. 8
is a CRT controller for driving the CRT7, and in the CRT7, it controls the positioning on the screen of the character string or formula that you want to display at the position indicated by the cursor, and by referring to the internal character generator. Display control is performed by converting code information into dot pattern data and displaying characters or symbols. Reference numeral 9 denotes a printer for printing documents created on the screen, and is an intelligent printer having a printer controller 10, which will be described later. 10 is a printer controller that controls the printer 9, and receives character data sent from the CPUI through the BUS,
Analyzes control data etc. and drives printer 9. FIG. 2 is a diagram showing an example of the arrangement of the keyboard 4. As shown in FIG. In the figure, K1 is a character key group used to input ordinary letters, numbers, symbols, etc. For example, it has a keyboard layout according to the JIS standard, and it can input hiragana from kana keys, etc., and also convert kana to kanji. The function allows you to input kanji. K2 is a group of function keys used to instruct the execution of special processing such as moving the cursor, inputting mathematical expressions, and inputting mathematical symbols, and there are four cursor movement keys r-J r-J rTJ rlJ that instruct the movement of the cursor. Two cursor movement keys r4J to instruct the cursor to move by formula unit
r) and g. Furthermore, by pressing the cursor movement key r-1 r>a and the function key at the same time, the cursor can be moved to the first or last mathematical expression. Furthermore, there is an r-mathematical formula input J key as a function key for instructing the start of mathematical formula input. By pressing the r mathematical expression input J key, a mathematical expression input window and mathematical expression soft keys as shown in FIG. 3 are displayed, and it becomes possible to input mathematical expressions. Furthermore, the function keys that can be used while inputting a mathematical expression include the ``mathematical symbol 1r execution 1r insertion 1r deletion 1 key''. "The mathematical symbol 1 key instructs the window to display a symbol unique to mathematical formulas that is not on the keyboard, for example, when entering a symbol that is unique to mathematical formulas and is not on the keyboard (such as ω, ε, A, etc.) This is a function key for The "Delete" key is used to delete entered formulas and characters, and the r insert j keys are used to enter the input mode (
This key is used to select ``insert/barite'', and the mode is switched cyclically. The ``R Execute'' key is a function key that instructs to output the mathematical expression input in the mathematical expression window to the document screen. K3 is a soft key group, consisting of eight soft keys. In normal mode, these eight keys are assigned the following functions: r full-width, j double-width Jr, half-width, 1 V superscript, subscript 1, underline 1, r equal allocation, 1 r centering 1, and r right alignment 1. However, when the mode is changed, the functions of these eight soft keys change. For example, in the formula input mode, 1 fraction J 111 rΣ1 rnJ ru2
The rn1r-1 key is assigned. When the eighth key lj-J is further pressed, the contents of the soft keys change as shown in Figure 3. FIG. 3 is a diagram showing an initial screen display in the mathematical expression input mode in an embodiment of the document processing apparatus according to the present invention. r while editing a document
By pressing the mathematical expression input 1 key, a mathematical expression window as shown at the bottom left of the screen is displayed, and a group of usable soft keys are displayed at the bottom of the screen in correspondence with the soft keys. The subsequent input of mathematical expressions is performed using this soft key detail K3, character key group K1, and function key group K2. In this embodiment, there are a total of 20 types of soft keys that can be used to input mathematical expressions. An overview of the functions of each key is explained below.・Fraction ■When this key is pressed, one character of the fraction grid will be displayed, the cursor will move to the input position of the first character of the denominator, and the mode will become denominator input mode. ■Enter the denominator and press the "r→" key on the space displayed on the right end of the denominator to end the denominator input mode, move the cursor to the first character of the numerator, and enter the numerator input mode. ■Enter the numerator and press the r-J key on the space displayed on the right end of the molecule.J-1 to finish inputting the fraction. ■When you press this key, one character of the J (root) line is displayed, the cursor moves to the first character in J, and the mode becomes J input mode. ■Enter the information in J and press the t-41 key on the space displayed at the right end of J to exit the I input mode. ■When this key is pressed, S with three lines will be displayed, the cursor will move to the position immediately after S on the lower line of S with three lines, and the mode will be set to the lower limit input mode. ■Enter the lower limit and press the r→1 key on the space displayed on the right edge of the lower limit to exit the lower limit input mode and move the cursor to the position immediately following 1 on the line above 1 in the 3-line grid. , and enters upper limit input mode. ■Enter the upper limit, and press the r-J key on the space displayed on the right end of the above formula.・Σ・■a U to complete the first input. ■When this key is pressed, a double-angle Σ is displayed, the cursor moves to the beginning of the bottom of the Σ, and the mode enters the input mode for the variable value of the first term of the sum. ■Enter the expression that represents the variable value of the first term, and press the r→1 key on the space displayed at the right end to exit the lower limit input mode and move the cursor to the top position of Σ. , becomes the input mode for the variable value of the last term of the sum. ■Enter the variable value of the last term of the sum, and press the r→1 key on the space displayed on the right end to finish inputting Σ. ■When this key is pressed, a double-width n is displayed and the cursor moves to the beginning of the lower part of H. The rest is the same as Σ. ■When this key is pressed, a double-width U is displayed, and the cursor moves to the beginning of the bottom of the U. The rest is the same as Σ. ■When you press this key, a double-width hundred is displayed and the cursor moves to the beginning of the expression below Σ. The rest is the same as Σ. ■When you press this key, the corresponding parentheses will be displayed as a pair (starting parenthesis and ending parenthesis), the cursor will move inside the pair of parentheses, and the mode will become input within the pair of parentheses. ■Finish the input inside the parentheses and press the r-1 key on the rightmost space to end the bare parenthesis input. ■When you press this key, lim will be displayed in half-width characters, the cursor will move to the beginning of the bottom of lim, and you will enter the bottom input mode. ■Enter the information at the bottom, and press the →1 key on the space at the right end of the bottom to exit the 1ia+ input mode. ■When you press this key, a message will be displayed requesting the number of rows and columns of the matrix to be input (up to 3 rows and 3 columns in this example), and the corresponding {matrix} will be displayed to indicate the number of rows and columns. A matrix of size is displayed (Matrix)
Ru. [Matrix] ■ Matrix element input is, for example, in the case of a matrix with 3 rows, 3 columns, 1 matrix, and 1, from 1 row and 1 column, 1 row and 2 columns, l rows and 3 columns,
This is done by sequentially inputting 2nd row, 1st column, 2nd row, 2nd column, 2nd row, 3rd column, 3rd row, 1st column, 3rd row, 2nd column, and 3rd row, 3rd column. (Press the "j→" key at the right end of each row to input the next row, and press the r→1 key at the right end of the last row to finish inputting the matrix.) ■To the right of the parentheses for multiple rows When you press this key, the cursor moves to the line above the parentheses and enters upper subscript input mode. ■ Finish inputting the upper subscript and press the r→1 key at the right end to finish inputting on the subscript. ■If you press this key subscript superscript down on the right side of the multi-line parentheses, the cursor moves to the line below the parentheses and enters the lower subscript input mode. ■Finish inputting the lower subscript and press the r-J key at the right end to finish inputting the lower subscript. FIG. 4 is an explanatory diagram showing how the cursor moves in the mathematical expression input mode on a conventional model. When you press the r-J key, you move l columns from left to right in normal character input, but
In formula input mode, the behavior changes slightly. Basically, it moves one column from left to right in the same way as when entering characters, but fractions,
If there is a mathematical symbol such as 1, Σ, etc. that requires input of characters/symbols at the bottom and upper part of the mathematical symbol, from the center of the mathematical symbol to the beginning of the bottom, from the end of the bottom to the beginning of the top,
Move one by one from the end at the top to the center of the next mathematical symbol. (See the cursor position in Figure 4 for details)1
The ←1 key performs the opposite operation to the r -1 key. The r11 key moves the cursor to the beginning of the upper expression rather than the lower expression when there is a mathematical symbol with a lower expression or an upper expression, such as a fraction i or Σ, and the r↓'' key The reverse operation is performed, and the movement of normal character input E is different. FIG. 5 is an explanatory diagram of the cursor movement method in the mathematical expression input mode according to the present invention. When moving the cursor on conventional models, you can only move the cursor one by one, so in the case of mathematical formulas in particular, the cursor may move up and down using the r→Jr4-J keys, so you have to move the cursor to the desired position. requires a large number of strokes and time. In the present invention, in addition to the conventional means of moving the cursor one by one, there is also a means of moving the cursor in units of mathematical symbols input using soft keys. i.e. r4J
By pressing the r>1 key, it is now possible to move in units of mathematical symbols input from the soft keys, and the cursor has been improved so that it can be easily moved to the desired position. FIG. 5 is a diagram showing an example of cursor movement by pressing the r4J r}J key. To explain using Fig. 5, with the cursor on y, press the 1 key to move sequentially over the mathematical symbols entered using the soft keys. In the example in Figure 5, from above y to above S, from above S to J
Move upwards, from above J to above the fractional rule, and from above the fractional rule to Σ. FIG. 6 shows another example in the formula input mode of the present invention.
This is an explanatory diagram of two cursor movement methods. In the case of the method shown in Figure 5, if you want to move the cursor to the beginning or the end of a formula, you need to enter r4Jrto1 multiple times, but with this method, you can move the cursor to the beginning of the formula or the end of the formula with one key operation. Finally, you will be able to move the cursor. To explain using Fig. 6, when the cursor is on y, press the 1 key while holding down the function 1 key, and move the cursor to the last mathematical symbol input using the soft keys, that is, as shown in Fig. 6. In the example above, you can move it all at once onto Σ. Also, by pressing the r4J key while holding down the "r function", it is possible to move all at once to the first mathematical symbol input using the soft keys, that is, to the 1 in the example of FIG. 6. FIG. 7 is an explanatory diagram showing a deletion method in the mathematical expression input mode in a conventional model. If you try to delete all the characters, move the cursor to a, press the delete J key 4 times to delete one character, and then press the r delete 1 key 1 time when there is no data in J. It is necessary to delete J by pressing the key twice, and in this example, it was necessary to press the r delete 1 key five times. FIG. 8 is an explanatory diagram of the deletion method in the mathematical expression input mode according to the present invention. As shown in the figure, in the present invention, by simply pressing the 1 Delete 1 key once while the cursor is on the mathematical symbol entered using the soft key, the entire mathematical term covered by that mathematical symbol can be deleted at once. It looks like this. In this example, by pressing down the key once, I
It is possible to delete everything at once. FIG. 9 is a diagram for explaining a method for outputting a created mathematical formula into a document screen according to the present invention. In the present invention, a formula is created in the formula window, and r execution 1
By pressing the key, the created formula will be output to the cursor position on the document screen. If you print it out as it is at that time, the line pitch will be the standard value of the system, and the line spacing of the multiple lines that make up the formula will become larger.
There is a strong tendency for printed results to become difficult to see. Furthermore, if you output it as is, when editing such as inserting characters before the formula, the inputted formula may be destroyed on the display screen due to the movement of the character string. In the present invention, two methods shown in FIG. 9 are adopted as means to address the above-mentioned drawbacks. First, regarding the line pitch, a method is adopted in which an appropriate value for printing a mathematical formula is determined within the system, and appropriate line pitch information is added and output at the time of output. r4J seen at the left end of the example display screen in FIG. 9 is the appropriate line pitch value determined in this way, and rsJ is a line pitch symbol for returning the line pitch to its original value. On the other hand, regarding the destruction of mathematical formulas, we have adopted a method of displaying and outputting one block code ◆ by adding a frame as shown in Figure 9. This block turns the entire formula into a block, making it unaffected by previous editing processing. Fig. 10 is a diagram for explaining a method in which the method shown in Fig. 9 (row bitch) is further improved. As shown in Figure 10, by pressing the r execution 1 key, the operator is requested to set the line pitch.
If you select Standard, the appropriate line pitch information is added by the system and output as shown in Figure 9 *3o+m
, 4mm, and 5mm are selected, the specified line pitch information is added and output, and when None is selected, the line pitch is not added and outputted, increasing the freedom of the operator. An increasing effect is produced. Further, in this embodiment, the values of the line pitch that can be set are determined as shown in FIG. 10, but the values are not limited to these values. Further, the value selection method may be set by inputting a desired numerical value using a key, instead of using the menu ↓ method as shown in FIG. 10. Figure tt-a is a diagram for explaining a method of displaying mathematical expression input in a conventional document processing device. As shown in the figure, the cursor in the formula is a vertical bar cursor instead of the normal under cursor. This is the i
This is thought to be because when using an under cursor like the one shown in the t-b diagram, it is necessary to display an extra space at the end of the formula, which has the disadvantage of making the display difficult to read. However, if a vertical bar cursor is used, on devices that use an under cursor during normal document input, it will feel unnatural to the operator, making it difficult to understand the current input character width mode, and it will be necessary to add functionality to the display program. There are drawbacks such as. FIG. 11-b is a diagram for explaining the display method for inputting numerical formulas according to the present invention. As shown in the figure, an under cursor is used and an extra space is displayed at the end of each formula term (upper and lower limits of 1, inside of J, numerator and denominator of fractions, and the end of the upper and lower parts of Σ). This is a space that exists so that you can add numbers, etc. to the end of each entered formula term; otherwise, it would be difficult to add numbers, etc. to the end of each formula term. In this embodiment, the last space of the formula term, which is required at the time of input, is displayed in the input formula window, and is sub-responsed all at once when outputting to the document screen. FIG. 11-c is a diagram for explaining a method that further improves the display method for inputting numerical formulas described in conjunction with FIG. 11-b. In this embodiment, as shown in the figure, the space explained in Figure 11-b is displayed only for the formula term where the cursor is present, thereby reducing the unnaturalness in the display. be. Of course, in this embodiment as well, when outputting to the document screen, this space is displayed as subresponse. FIG. 12-a is a diagram illustrating a case where fractions are successively input using a conventional document processing device. When fraction lines are large enough for multiple characters, they need to be connected when displaying and printing, so it is common to use ruled lines. If you enter a fractional number, a problem will occur where the two fractional lines are connected. Figures 12-b are diagrams illustrating a case where fractions are input continuously in the document processing apparatus of the present invention. As shown in the figure, when you enter fractions consecutively, two
This has been improved by inserting a period between two fractional lines to eliminate the drawbacks of the previous version. In this example, a period is inserted between two consecutive fractional lines (H L, but as will be described later with reference to Figure 20-a, a half-width or full-width space is inserted). In this example, the fractional ruler was used as an example, but
As will be described later with reference to FIG. 20-c, the same applies to the continuation of ruled lines when, for example, over-par is represented by ruled lines. Furthermore, the same applies not only to ruled lines but also to the case where symbols that are connected and displayed/printed by complementation when they are consecutive under normal control are used as mathematical symbols. FIG. 13 is an explanatory diagram showing the shift mode transition when a mathematical formula is input in the present invention. As shown in the figure, when inputting a mathematical formula, alphanumeric characters are usually entered following the mathematical symbol assigned to the soft key. A method is used to forcibly change to alphanumeric mode if the Figure 14 shows bare parentheses, {pair}, (bare) in the present invention.
, [Bear], 1Bear 1 is a diagram for explaining the display method when Bear 1 is input and the input process into the Bear parentheses. In the present invention, different processing is performed when a mathematical formula is input within parentheses input using the bare parentheses soft key and when a mathematical formula is input within parentheses input one by one using normal keys. . Parentheses entered using normal keystrokes are treated as normal characters, whereas parentheses entered using the bare parentheses softkey are treated as characters entered inside them.
Brackets are automatically scaled (both horizontally and vertically) to the size of the symbol. In the present invention, in order to allow the operator to visually distinguish the difference between the two types of parentheses on the display, the display format of parentheses entered using the paired parentheses soft key is changed from that of normal parentheses. The system uses a method to display the information as follows. A specific example is shown in Figure 14. In the figure, the parentheses in (a+b) are input using normal keystrokes, and ``continued'' indicates parentheses entered using the paired parentheses soft key, and paired parentheses are highlighted. ing. Furthermore, once automatic enlargement is performed, multiple lines of parentheses cannot be entered using normal key input, so there is no need to distinguish bare parentheses by highlighting them on the display. Therefore, as shown in Figure 14, enlarged paired brackets are returned to their normal display. Furthermore, when the enlarged parentheses are reduced to a single line, they are displayed in reverse video again. FIG. 15 is a diagram illustrating a special case method of automatic enlargement processing of bare parentheses according to the present invention. In order to incorporate multi-line parentheses into a document, it is common to construct multi-line parentheses by combining multiple types of symbols. For example, if { with three lines is used as a table formula, it is necessary to align the center of the entire continuation of the formula, and if you adopt the method of combining multiple types of symbols to construct multiline parentheses as described above, It becomes impossible to display the center of the parentheses on even-numbered lines aligned with the center of the expression. For example, if a mathematical symbol (J, 1i+a, vector, overbar, etc.) that takes two lines is entered inside pair of parentheses, if you expand the pair of parentheses to two lines, the pair will be aligned with the center of the expression. The parentheses cannot be displayed. In the present invention, as shown in FIG. Number of lines of formula entered in +
1) It is possible to display the center of the pair of parentheses aligned with the center of the expression. is displayed. FIG. 16 is an explanatory diagram showing a state when numerical values are input in a matrix in a conventional document processing device. The figure shows an example in which numerical values are entered in a matrix of 3 rows and 3 columns, but the first digit of each column is not aligned. FIG. 17 is an explanatory diagram showing the state when numerical values are input into a matrix in the apparatus of this embodiment. As shown in the figure, in this embodiment, by automatically performing decimal tab processing within the matrix, it is possible to align the first digits of each column and display them. FIG. 18 is an explanatory diagram showing a state in which a large number of fractions, I, etc. are used in upper and lower subscripts in a conventional document processing device. For normal expressions, the center of the expression is displayed. However, if you align the centers of the mathematical expressions in the upper and lower subscripts at the beginning of each subscript in the same way as above, the upper and lower subscripts will be displayed as shown in Figure 18. A problem arises in that it becomes difficult to distinguish between the two, or even between these subscripts and the following expression. FIG. 19 is an explanatory diagram showing a display state when a large number of fractions, J, etc. are used in the upper and lower subscripts in the apparatus of this embodiment. In this example, for the upper subscript, the lowest line of the formula that makes up the subscript is always the tip of the upper subscript, and for the lower subscript, the top line of the formula that makes up the subscript is always used. , are always displayed aligned to the line at the beginning of the lower subscript (in the example, next to 1). By adopting this method, there will always be one space between the upper and lower subscripts, so the upper and lower subscripts will not be mixed up, and the two will be clearly distinguished. It also becomes clear to distinguish between the subscript of and the following expression. Figures 20-a, 20-b, and 20-c are the 12th
As explained in the figure, when fractions are input consecutively,
FIG. 7 is a diagram for explaining another example of a method for preventing fractional rules from connecting. In the embodiment shown in Fig. 12, a period is inserted between the fractional lines, but in the embodiment shown in Fig. 20-a, the problem is solved by inserting a half-width space. According to this method, there is no need to display unnecessary periods, which further improves the display. In addition, in the example shown in Figure 20-b, without inserting a half-width space, the left fractional rule is made into a ruled line code that extends only to the left and does not extend to the right, and the right fractional rule is made to extend only to the right and does not extend to the left. This is an example of solving the problem of connected fractional rules by converting to a ruled line code, which eliminates the need to display half-width spaces that are not actually input, and is further improved.Next, the second 0-c? il is an example of a case where a similar problem occurs in cases other than consecutive fractional rules. The figure shows a case where an over-par (same as a vector) is input next to J, and the J rule and over-pur rule are connected. Figure 20-d solves the problem shown in Figure 20-c.
-a Figure 9 This is a case where the problem is solved by the method shown in Figure 20-b. Figures 21-a and 21-b show that when a formula with an even number of rows is entered within paired parentheses, the automatic extension to the number of rows in the formula + bare parentheses on IJ rows is shown in Figures 21-a and 21-b. death,
FIG. 4 is a diagram for explaining an example of application to matrix input in relation to a method of displaying the center of bare parentheses aligned with the center of an expression. FIG. 21-a is a diagram illustrating an example in which a matrix of 2 rows and 1 column is input. As with the case of paired parentheses, if you display it as a two-row matrix, you will not be able to align the center of the matrix with the center of the equation and display it. Furthermore, the problem arises that the line spacing between the l-th line and the second line becomes narrower, making it difficult to distinguish between the first and second lines. In this embodiment, as shown in the figure, when a matrix of 2 rows and 1 column is input, a pair of matrix parentheses of 2 rows + 1 row is generated, and the first row of the matrix is set as the first row. The second line is displayed on the third line, and a space line always exists between the lines. FIG. 21-b is a diagram illustrating an example in which a matrix of 3 rows and 1 column is input. When a matrix with 3 rows and 1 column is input, a pair of matrix parentheses with 3 rows and 2 rows is generated as shown in Figure 21-b in almost the same way as shown in Figure 21-a. , display the first row of the Gatsu matrix on the first row, the second row on the third row, and the third row on the fifth row, and be sure to put 1 between the rows.
This method employs a method in which space lines exist. [Effects of the Invention] As explained above, according to the present invention, even when inputting mathematical formulas,
Since the same cursor as usual is used, it is easier for the operator to see and control the device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the document processing device of the present invention, FIG. 2 is a layout diagram of the keyboard shown in FIG. 1, and FIG. A display screen diagram showing state transitions, Fig. 4 is an explanatory diagram showing an example of cursor movement processing r-J in units of columns in inputting mathematical formulas, Fig. 5 is an explanatory diagram of high-speed cursor movement processing, and Fig. 6 is an illustration Figure 5 is an explanatory diagram of a faster cursor movement process than that of Figure 5. Figure 7 is an explanatory diagram showing the transition state when one character of a formula is deleted using a conventional device. An explanatory diagram of the process of deleting by operation. Figure 9 is an explanatory diagram showing how the created formula is output with the line pitch and block added to the document screen. An explanatory diagram showing the sor movement process. Cursor movement process and output Explanatory diagram of control of 12-a
Fig. 12-b is an explanatory diagram showing an example of display when fractions are continuously input with the conventional device; Fig. 12-b is an explanatory diagram showing an example of display when fractions are continuously input with the device of the present invention; Fig. 13: An explanatory diagram showing the shift state transition when the formula soft key is pressed. Fig. 14 is an explanatory diagram showing the difference in display between normal parentheses and paired parentheses. Fig. 15 is an explanatory diagram showing the difference in display between normal parentheses and paired parentheses. FIG. 16 is an explanatory diagram showing an example of a case where numerical formulas are input into a matrix using a conventional device. FIG. Fig. 18 is an explanatory diagram showing an example of inputting a numerical value, and Fig. 18 is an explanatory diagram showing an example of inputting J and a fraction in the upper and lower subscripts using the conventional device. Figure 20-a is an explanatory diagram showing an example where J and fractions are entered in Figure 20-b. Fig. 20-C is an explanatory diagram showing an example in which the method shown in Fig. 20-a is further improved; Fig. 20-C is an explanatory diagram showing an example when J and over par are input in succession with the conventional device; Fig. 20-d is Figure 21-a is an explanatory diagram showing an example of inputting J and over par consecutively with the device of the present invention.
Explanatory diagram showing an example of inputting numerical values into the column matrix, 2nd
Figure 2-a is a diagram showing an example of an input formula, Figure 22-b is an explanatory diagram showing a control method using the structure control data table of the formula control data table, and Figure 22-d is a formula An explanatory diagram of the character table, Fig. 23 is a flowchart of mathematical expression processing, Fig. 24 is a flowchart of function key correspondence processing, Fig. 25 is a flowchart of soft key correspondence processing, 26th rgJ is a flowchart of high speed cursor movement processing, 27th Figure 28 is a flowchart of deletion processing, Figure 28 is a flowchart of execution key processing, Figure 29 is a flowchart of cursor movement processing, Figure 30 is a flowchart of fraction processing, Figure 3l is a flowchart of pair parenthesis processing, and Figure 32 is a flowchart of pair parenthesis processing. Flowchart of in-matrix character input processing. FIG. 33 is a flowchart of subscript upper and lower display processing. 1... CPU 2... ROM 3... RAM 4... Keyboard 5... Keyboard controller 6... Buffer memory 7... Display device 8... Display device controller 9... Printer 10 ...Printer controller K 3 K 2 2nd figure l 2 3 1st figure 1 0 9 9 bp
baσσσσ17[F σt
F 17 [F (F3 Figure 6 Figure 5 Figure 7 Figure 1 U Kyodai 1 1 Figure younger brother 2-k) Figure 1 4 Figure 1 3 Figure 1 5 Figure 1 9 Figure 2 0-b Figure 20-eFigure 20-dFigure 22-'bFigure 22-cFigure 21-aFigure 21-bFigure 22-dFigure 29Figure 30 Figure 31 Figure 32

Claims (2)

[Claims] (1) An input means for inputting characters and symbols, a display means for displaying the characters and symbols input by the input means, and an input mode for selecting an input mode including a formula input mode for inputting mathematical formulas. a selection means; and when a formula input mode is selected by the input mode selection means, when displaying a specific symbol on the display means, a character/symbol string to which the symbol is added is sequentially input and displayed. control so that the space exists at the end of the character/symbol string to which the symbol is added, and after the input is displayed in the formula input mode, when a mode other than the formula input mode is selected by the input mode selection means, A document processing device comprising: display control means for suppressing display of the space and displaying the space. (2) An input means for inputting characters/symbols, a display means for displaying the characters/symbols inputted by the input means, an instruction cursor for indicating characters/symbols on the display means, and inputting a mathematical formula. input mode selection means for selecting an input mode including a formula input mode to When specifying a character/symbol string to which a symbol is added using the instruction cursor, the space for sequentially inputting and displaying the characters/symbol string to which the symbol is added is the same as the character/symbol string to which the symbol is added. display control means that controls the space to be present at the end of the display, and suppresses display of the space when a mode other than the formula input mode is selected by the input mode selection means after the input is displayed in the formula input mode; A document processing device comprising: