JPH04310170A - Document preparing device including numerical formula - Google Patents

Abstract

PURPOSE:To provide the document preparing device capable of easily preparing documents including such as fractional expressions, expressions including radical signs, determinants, indicies, and operation expressions. CONSTITUTION:When a fraction input command is provided to a means 11, denominator and numerator parts are stored in means 12 and 13. A means 14 automatically produces the prescribed length of denominator/numerator division line and a means 15 prepares an image of the fractional expression. When a radical sign input command is provided to a means 21, radical sign elements are stored in a means 22, a means 23 produces a radical sign according to this, and a means 24 prepares the overall image. Means 31 to 34 can produce determinants and means 41 to 45 can provide indicies. When an operation expression input command is provided to a means 51, means 54 and 55 indicate the location of characters to be inputted to the periphery of operational codes, enabling character input for each location.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document creation device, and more particularly to a document creation device that can easily create documents containing mathematical formulas.

0002

2. Description of the Related Art With the development of computer technology, document creation software for computers, word processors, etc. are also progressing day by day. Such document creation devices have become widespread in offices and homes, providing an environment in which even ordinary people without specialized knowledge can easily create documents. On the other hand, it also improves the quality of created documents and improves the quality of documents created using so-called DTP (Desk Top Pub).
There are also commercially available document creation devices that are capable of ``lishing''.

0003

However, there is a problem in that document creation devices that are currently in widespread use cannot easily create documents containing mathematical formulas. Mathematical formulas are frequently used in writing scientific and technical literature. Such mathematical formulas need to be laid out using a different formatting from ordinary text, and conventional document creation devices require complicated tasks such as specifying character input position, character size, and inputting special arithmetic symbols. was needed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a document creation device that can easily create documents containing mathematical formulas.

[0005]

[Means for Solving the Problems] (1) The first invention of the present application provides a method for inputting a fractional formula from a fractional formula creation start instruction to a creation end instruction in a document creation device. a fraction input recognition means that separates the input character or expression into a numerator part and a denominator part using the division code as a boundary when a character or expression is input with a division code; numerator part storage means for storing characters or formulas recognized as part; denominator part storage means for storing characters or formulas recognized as denominator part; dividing line generating means for generating a denominator/child dividing line having a length corresponding to the longer one by comparing the length with the horizontal length of the denominator stored in the denominator storing means; A fractional expression that creates an image of a fractional expression by composing the numerator part stored in the means, the denominator part stored in the denominator part storage means, and the denominator/child dividing line generated by the dividing line generating means. a creation means, an output means for outputting an image of the created fractional formula,
It has been established.

(2) The second invention of the present application is such that, in order to easily input a mathematical formula containing a radical, a document creation device starts creating a mathematical formula containing a radical from an instruction to start creating the formula and ends the creation. Until the instruction, when a character or expression is input, there is a radical input recognition means that recognizes the input character or expression as an element within the radical, and a radical input recognition means that recognizes the input character or expression as an element within the radical. Calculate the horizontal length and vertical length of the internal radical element storage means to be stored and the internal radical element stored in the radical internal element storage means, and calculate the horizontal length and vertical direction accordingly. a radical symbol generating means for generating a radical symbol having a length of , an intra-radical element stored in the intra-radical element storage means, and a radical symbol generated by the radical symbol generating means; The present invention is provided with a radical expression creation means for synthesizing and creating an image of a mathematical expression including a radical, and an output means for outputting the image of the created radical expression.

(3) In the third invention of the present application, in order to easily input a determinant, in a document creation device, characters or Determinant input recognition means that recognizes the input characters or formulas as elements within the determinant when a formula is input, and element storage means within the determinant that stores the characters or formulas recognized as the elements within the determinant. Then, calculate the horizontal length and vertical length of the element in the determinant stored in the determinant element storage means, and create a determinant with the corresponding horizontal length and vertical length. A frame symbol generating means for generating a frame symbol, an element within the determinant stored in the element storing means within a determinant, and a determinant frame symbol generated by the frame symbol generating means are combined to generate an image of the determinant. The apparatus is provided with a determinant creating means for creating a determinant, and an output means for outputting an image of the created determinant.

(4) In the fourth invention of the present application, in order to easily perform the task of adding subscripts, when an instruction to start adding subscripts is given in a document creation device, the object of adding subscripts is a subscript input recognition means that recognizes a target character and a subscript addition position for the target character, and recognizes characters or expressions input until an instruction to end the subscript assignment work is given as a subscript element; a subscript element storage means for storing a character or expression recognized as a subscript element; a size determining means for determining the size of a subscript based on the size of a target character recognized by the subscript input recognition means; and a subscript input recognition means. an allocation position determining means for determining a subscript allocation position based on the subscript assignment position recognized by the means; and a subscript element stored in the subscript element storage means;
A subscript adding means for creating an image in which a target character is assigned a subscript with the size determined by the size determining means and allocated to the allocation position determined by the allocation position determining means, and the created image is output. An output means is provided.

(5) In the fifth invention of the present application, in order to easily input an arithmetic expression, in a document creation device, characters or When an expression or a predetermined code is input, an arithmetic expression input recognition means that recognizes the input character or expression as an element in the arithmetic expression and the predetermined code as an input instruction code, and a calculation expression input recognition means used in the arithmetic expression. an arithmetic expression structure storage means for storing an arithmetic symbol and a plurality of positions defined with respect to the arithmetic symbol; a forme information storage means for storing forme information for each of the plurality of positions; and one of the plurality of positions. position indicating means for instructing, position correcting means for correcting the position indicated by the position indicating means based on the input instruction code recognized by the arithmetic expression input recognition means, and a storage area corresponding to a plurality of positions; Arithmetic expression element storage means stores the elements in the arithmetic expression recognized by the arithmetic expression input means in a storage area corresponding to the position indicated by the position indicating means, and the arithmetic expression The elements within an arithmetic expression stored in the corresponding storage area in the element-in-expression storage means are allocated based on the corresponding formatting information in the formatting information storage means, and an arithmetic expression consisting of an operational symbol and an element within an arithmetic expression is created. The present invention is provided with an arithmetic expression creation means for creating an image of the arithmetic expression, and an output means for outputting the image of the created arithmetic expression.

0010

[Operation] (1) According to the first invention of the present application, a fractional expression is divided into a numerator part and a denominator part, and a division code is inserted between the two parts. The denominator/child dividing line is automatically generated by the dividing line generating means. This denominator/child dividing line has a length depending on whichever is longer, either the numerator part or the denominator part. Further, the input numerator part and denominator part are automatically assigned by the fractional expression creation means. Therefore, the operator can input complex fractional expressions with simple operations.

(2) According to the second invention of the present application, when an instruction to start creating a mathematical formula containing a radical is given, characters or formulas input after that are automatically allocated within the radical as elements within the radical. It will be done. Further, a radical of a size corresponding to the element within this radical is automatically generated and assigned. Therefore, the operator can input expressions including radicals with simple operations.

(3) According to the third invention of the present application, when an instruction to start creating a determinant is given, characters or expressions input thereafter are automatically assigned as elements within the determinant. Further, a determinant frame symbol having a size corresponding to the element within the determinant is automatically generated and allocated. Therefore, the operator can input the determinant with a simple operation.

(4) According to the fourth invention of the present application, when an instruction to start the subscript adding operation is given, the target character to which the subscript is to be added and the subscript adding position for this target character are recognized, and the subsequent input character or expression is automatically assigned as a subscript element. At this time, the size of the subscript element is automatically determined by the size determining means, and the layout position is automatically determined by the layout position determining means. Therefore, the operator can perform the subscript assignment work with simple operations.

(5) According to the fifth invention of the present application, when an instruction to start creating an arithmetic expression is given, characters or expressions input thereafter are recognized as elements within the arithmetic expression. Arithmetic symbols used in the arithmetic expression and a plurality of positions defined with respect to the arithmetic symbols are stored in advance in the arithmetic expression structure storage means, and formatting information for each position is stored in the formatting information storage means. When the input instruction code is given, the position indicated by the position indicating means changes, so it is possible to specify the allocation position of the element in the arithmetic expression to be input from now on. The operator only needs to specify the desired allocation position and input the elements in the arithmetic expression. The input content is automatically allocated to the designated position based on a predetermined formatting. Therefore, the operator can input an arithmetic expression with a simple operation.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on illustrative embodiments. FIG. 1 is a block diagram showing the basic configuration of a document creation device according to an embodiment of the present invention. The major components of this device are a computer 100, input means 200, and output means 300. As the computer 100, a workstation is used in this embodiment. Further, as input means 200, a keyboard and mouse connected to this workstation are used, and as output means 300, a display and a printer also connected to this workstation are used. Of course, other devices may be used as these peripheral devices. The block diagram shown in the computer 100 is as follows:
It is a functional expression of processing by this computer, and each block is a memory or CPU in the computer.
It is a component that can be realized by combining hardware such as and software executed by a CPU. Each block shown here is only related to the formula input function, but in reality, this computer 1
In addition to these blocks, 00 includes blocks for general document creation functions.

[0016] The advantage of this device is that it is possible to easily input mathematical expressions while looking at the display screen of the display connected as the output means 300. A window can be opened at a desired position on the display screen of the display. In this device, windows for two screens as shown in FIG. 2 are normally opened on the display screen 310. The document screen 311 is a screen that shows an image of a document to be created, and is a so-called WYSIWYG screen.
(What You See Is What You
Based on the concept of Get), an image that is exactly the same as the image printed on the printer is displayed. The entered mathematical formula will be displayed on this document screen 311. On the other hand, a menu of various commands is displayed on the command screen 312. The operator can input the displayed command by specifying it using a mouse or the like. In this device, two types of cursors are displayed in consideration of convenience of operation. The first cursor is a cursor called a caret CT, and the second cursor is a cursor called a mouse cursor MC. The former is document screen 3
11, the latter serves as a mouse pointer. FIG. 3 shows a command menu related to inputting mathematical expressions. In the device of this embodiment, the input means 20
Commands 61-69 shown in Figure 3 by mouse as 0
, enter characters, symbols, and special codes using the keyboard, and input mathematical formulas. Here, the formulas are (1) fractional formulas, (2) formulas containing radicals, (3
) Determinant, (4) Subscript, and (5) Arithmetic expression, and the input work and operation of the device will be explained.

1. Fractional Formula Input processing of a fractional formula consists of a fraction input recognition means 11, a numerator part storage means 12, a denominator part storage means 13, a dividing line generation means 14, and a fractional formula creation means 1 in the computer 100 shown in FIG.
This is done by each component of 5. When inputting a fractional formula, the operator specifies a command 61 on the command screen 312 shown in FIG. 3 using the mouse. This command 61 is a command that instructs to start creating a fractional formula. When this command is input from the mouse, the fraction input recognition means 11 recognizes the characters or expressions input from the keyboard thereafter, dividing them into a numerator part and a denominator part until the instruction to finish creating a fraction formula is given. , the numerator part is stored in the numerator part storage means 12, and the denominator part is stored in the denominator part storage means 13. The numerator part and denominator part are distinguished by a division code. The device of this embodiment recognizes the characters or expressions input before the division code as the numerator part, and recognizes the characters or expressions input after the division code as the denominator part.

The dividing line generating means 14 is a part of the molecule part storing means 1.
The horizontal length of the numerator part stored in the denominator part 2 is compared with the horizontal length of the denominator part stored in the denominator part storage means 13, and denominator division is performed with a length corresponding to the longer one. Generate a line. The fraction formula creation means 15 then generates the numerator part stored in the numerator part storage means 12, the denominator part stored in the denominator part storage means 13, and the denominator/child dividing line generated by the dividing line generating means. , and create an image of the fractional expression. The image of the fractional formula created in this way is output to the output means 300.

Next, the input processing of fractional expressions will be explained with reference to a specific example shown in FIG. Figure 4(a) to (j)
2 is a diagram showing the transition of the document screen 311 during the operation of inputting a fractional formula. As described above, a caret CT is displayed on the document screen 311 to indicate the layout position of the character to be input. Figure 4(a)
This is the screen when the character "X=" is input, and the caret CT is at the position of the next character to be input. Although this character string "X=" constitutes a part of the mathematical expression, it can be input in the same way as ordinary sentences without performing any special input processing. However, when creating a document according to rules such as inputting all the characters that make up a mathematical formula in italics, it is necessary to give instructions to change the font, but in this specification, such font changes etc. A description of the processing will be omitted.

Now, in the state shown in FIG. 4(a), if it is necessary to input a fractional expression following "X=", the operator specifies command 61 with the mouse. The fraction input recognition means 11 recognizes the start of creation of a fraction expression by this command 61. At this time, the numerator part and the denominator part are not yet stored in the numerator part storage means 12 and the denominator part storage means 13. In this manner, when both the numerator part and the denominator part are undefined, the dividing line generating means 14 generates a denominator dividing line having a minimum unit length. In this embodiment, the length of one character is defined as the length of the minimum unit. Therefore, the fractional formula created by the fractional formula creating means 15 is a formula consisting only of denominator and digit dividing lines with a length of one character, and the display is as shown in FIG. 4(b). Of course, the length of the minimum unit does not necessarily have to be the length of one character, and can be set to any length. In this embodiment, the input of the fractional formula is performed from the numerator part, so the caret CT is displayed in the numerator part.

Here, when the operator inputs, for example, the character "A" from the keyboard, this character "A" is stored in the molecule part storage means 12. The length of the molecule remains the minimum unit length of one character, and the display becomes as shown in Figure 4(c). Furthermore, when the character "B" is inputted, the character string stored in the molecule part storage means 12 has a length equal to two characters "AB". Therefore, the dividing line generating means 14 generates a dividing line having a length of two characters. In this way, the display becomes as shown in FIG. 4(d), and the dividing line appears to be extended by inputting the character "B". FIG. 4(e) shows a state in which the character string "+BCD" is further input. If you input not only characters but also various expressions (for example, expressions containing radicals, determinants, arithmetic expressions, etc., which will be described later), the dividing line will extend according to the length of the expression.

In the state shown in FIG. 4(e), the caret CT
is located at the end of the molecule part, and as you enter more characters, those characters will continue into the molecule part. Therefore, in order to input the denominator part, the division code is input. In this embodiment, "control f (hereinafter abbreviated as Cf)" input from the keyboard is used as the division code, but the division code can also be input using other control codes or command input using the mouse. It doesn't matter. When Cf is input in the state shown in FIG. 4(e), the fraction input recognition means 11 recognizes the characters or expressions input thereafter as the denominator part. Therefore, as shown in FIG. 4(f), the caret CT moves to the denominator (in this embodiment, the denominator is allocated while being centered, so the caret CT comes to the center of the denominator). If the user then inputs the character ``2A'', the display will appear as shown in FIG. 4(g). In this state, the numerator part storage means 12 stores the character string "AB+BCD", and the denominator part storage means 13 stores the character string "2A". Furthermore, as the denominator, “+2B+2C
'', the character string in the denominator is longer than the character string in the numerator, so the dividing line generating means 14 generates a dividing line with a length matching the denominator. If the creation of the fractional formula is to be terminated at this point, by inputting the creation end instruction code, the final fractional formula is created as shown in FIG. 4(h). In this embodiment, Cf is also used as the creation end instruction code, and if Cf is input after the denominator "2C" is input, the creation of the fractional formula is completed.

In the end, the work required to create the fractional formula shown in FIG. , Cf (completion instruction for creating a fractional formula), in this order, and there is no need to consider allocation positions or create dividing lines. In this way, the present device greatly simplifies the input work of fractional formulas. Note that it is also possible to incorporate further fractional expressions into fractional expressions. For example, as shown in Figure 4(i), the molecular part is “AB+B”.
If you input command 61 again at the point where you input "C", a dividing line for another fractional expression will be generated within the numerator, and the caret CT will move to the numerator of the second fractional expression in this nested structure. do. Therefore, enter "D", Cf (division code of the second fractional formula), "E", Cf (instruction to finish creating the second fractional formula) to complete the second fractional formula,
Furthermore, Cf (division code of the first fractional expression), “2A+
2B+2C”, Cf (instruction to finish creating the first fractional formula)
By inputting , you can create a nested fractional formula as shown in Figure 4(j).

2 Mathematical expressions containing radicals The input processing of mathematical expressions containing radicals is performed by the radical input recognition means 21, the radical element storage means 22, the radical symbol generation means 23, in the computer 100 shown in FIG. radical expression creation means 24;
This is done by each component of When the operator inputs a mathematical formula that includes radicals, the operator uses the command screen 3 shown in Figure 3.
Specify a command 62 in 12 using the mouse. This command 61 is a command that instructs to start creating a mathematical formula including radicals. When this command is input from the mouse, the radical input recognition means 21 recognizes any characters or expressions input from the keyboard afterward until the instruction to finish creating a mathematical formula including the radical is recognized as an element within the radical. and stores it in the radical element storage means 22. The radical symbol generating means 23 determines the horizontal length and vertical length of the radical symbol element stored in the radical symbol element storage means 22, and calculates the horizontal length and vertical dimension according to the determined horizontal length and vertical length. Generates a radical symbol with length. Then, the radical expression creation means 24 uses the radical element storage means 2
2 and the radical symbol generating means 23
The radical symbol generated by , is synthesized to create an image of the radical expression. The image of the radical expression created in this way is output to the output means 300.

[0025] Next, input processing of mathematical expressions including radicals is performed as follows.
This will be explained based on a specific example shown in FIG. Figure 5(a)
-(h) are diagrams showing changes in the document screen 311 during the process of inputting a mathematical formula including radicals. Now, as shown in Figure 5(a), when the character "X=" is input and it is necessary to input a mathematical expression that includes a radical following "X=", the operator can use the mouse to Specify command 62. The radical input recognition means 21 recognizes, by this command 62, the start of creating a mathematical expression including a radical. At this time, the intra-radical element storage means 22 has not yet stored any intra-radical elements. In this manner, in a state where the element within the radical is undefined, the radical symbol generating means 23 generates a radical symbol of the minimum size. In this example, 1
Generates a radical symbol of a size appropriate for the number of characters. Therefore, the radical expression created by the radical expression creation means 24 is as shown in FIG. 5(b). Note that the radical input recognition means 21 recognizes the characters or expressions input thereafter as elements within the radical, so the caret CT is
It will now appear inside the radical.

[0026] Here, when the operator inputs, for example, the character string "AB" from the keyboard, this character string "
AB'' is stored in the intra-radical element storage means 22 as an intra-radical element. Since the length of the element within the radical sign is two characters, the radical sign generating means 23 generates a radical sign whose horizontal length corresponds to two characters. In this way, the display display is as shown in Figure 5(c).
The horizontal line of the radical symbol appears to be extended by inputting the letter "B". Figure 5(d) further shows “+
This shows a state in which the character string "BCD" has been input. If you enter not only characters but also various expressions (for example, expressions containing different radicals, determinants, arithmetic expressions, etc.), the radical symbol will grow depending on the length of the input. To end the creation of a mathematical formula that includes radicals, just input an end instruction. In this embodiment, Cf is also used as an end instruction. The characters after entering the termination instruction will be allocated outside the radical symbol.

Radical symbols can extend not only horizontally, but also vertically. For example, in the state shown in FIG. 5(b), if the above-mentioned fractional expression creation command 61 is input, the radical symbol will extend vertically as shown in FIG. 5(e). This is because the contents of the intraradical element storage means 22 overlap with the storage contents of the numerator part storage means 12 and the denominator part storage means 13, resulting in a two-stage structure of the numerator part and the denominator part. In this way, each block in Figure 1 shows a function realized by software, and even if the components are shown as separate blocks, they do not necessarily represent the actual hardware memory area. They don't necessarily have to be separate things. If you input the numerator part from the state shown in Figure 5(e), the result will be as shown in Figure 5(g), where you will input Cf (division code), continue inputting the denominator part, and finally enter it again. By inputting Cf twice (the first time is an instruction to end the creation of a fractional expression, and the second time is an instruction to end the creation of a radical expression), the final result is a root with a fractional expression as an element in the radical, as shown in Figure 5(h). The formula is obtained.

In this manner, the operator does not have to perform any work to create radical symbols, and can very easily create mathematical expressions that include radical symbols.

3 Determinant The input process of the determinant is performed by the determinant input recognition means 31 and determinant element storage means 32 in the computer 100 in FIG.
, the determinant frame symbol generation means 33, and the determinant creation means 34. When inputting a determinant, the operator specifies a command 63 on the command screen 312 shown in FIG. 3 using the mouse. This command 63
is a command that instructs to start creating a determinant. When this command is input from the mouse, the determinant input recognition means 31 recognizes the characters or expressions input from the keyboard thereafter as elements within the determinant until the instruction to finish creating the determinant, and converts them into the determinant. It is stored in the internal element storage means 32. The determinant frame symbol generation means 33 includes the determinant internal element storage means 32
The horizontal and vertical lengths of the elements in the determinant stored in the determinant are determined, and a determinant frame symbol having corresponding horizontal and vertical lengths is generated. Then, the determinant creation means 34 combines the elements in the determinant stored in the element storage means 32 in the determinant and the determinant frame symbol generated by the determinant frame symbol generation means 33, and Create an image of The image of the determinant thus created is output to the output means 300.

The above process is similar to the process of creating a mathematical expression including radicals, described above, and detailed explanation will be omitted here. With this function, for example, a determinant as shown in FIG. 6 can be easily created.

4. Subscript The subscript input process is carried out by the subscript input recognition means 41, subscript element storage means 42, size determination means 43, allocation position determination means 44, and subscript adding means 4 in the computer 100 shown in FIG.
This is done by each component of 5. When inputting a subscript, the operator specifies one of the commands 64 to 67 on the command screen 312 shown in FIG. 3 using the mouse. Command 64 is a command to start adding a superscript, command 65 is a subscript, command 66 is a superscript, and command 67 is a command to start adding a bottom subscript. When these commands are input from the mouse, the subscript input recognition means 41
From then on, characters or expressions entered from the keyboard until the end of the subscript assignment task are recognized as subscript elements,
It is stored in the subscript element storage means 42.

[0032] The subscript input recognition means 41 also recognizes the target character to which a subscript is to be added and the position at which the subscript is to be added to this target character, and the recognition result is transferred to the size determining means 43.
and is given to the allocation position determining means 44. The size determination means 43 determines the size of the subscript based on the size of the target character recognized by the subscript input recognition means 41. Generally, the size is determined so that the subscript is slightly smaller than the target character. Allocation position determining means 44
determines the subscript allocation position based on the subscript addition position recognized by the subscript input recognition means 41. The subscript addition position can be recognized by which command is input from the mouse. That is, commands 64, 65, 66
, 67 correspond to upper right, lower right, upper left, and lower left positions, respectively. For example, if the command 64 is input, the subscript will be added to the upper right part of the target character, so the allocation position determining means 44 will assign the subscript in consideration of the position and size of the target character. Determine the position.

The subscript adding means 45 includes the subscript element storage means 4
The subscript element stored in 2 is allocated to the allocation position determined by the allocation position determination means 44 with the size determined by the size determination means 43, and an image is created in which a subscript is attached to the target character. . In this way, the result of adding subscripts is output to the output means 300.

Next, the process of adding subscripts will be explained with reference to a specific example shown in FIG. Figure 7(a) - (i
) is a diagram showing the transition of the document screen 311 during this subscript adding work. FIG. 7(a) shows the screen when the character "A" is input, and the caret CT is at the position of the next character to be input. The task of adding a superscript to the letter "A" is as follows. First, the operator specifies command 64 (superscript) using the mouse. The subscript input recognition means 41 recognizes the start of the subscript adding operation by this command 64, and stores the characters or expressions input thereafter in the subscript element storage means 42. Further, information indicating the size and position of the target character "A" to be subscripted is provided to the size determining means 43 and the allocation position determining means 44. Thereby, the size determining means 43 determines the size of the character or formula to be inputted, and the layout position determining means 44 determines the layout position thereof. In the device of this example, to indicate this size and position,
A caret CT is displayed on the screen. That is, if the command 64 is input in the state shown in FIG. 7(a), the state shown in FIG.
b) The size and position of the caret CT change as shown in . The caret CT in FIG. 7(a) has a size corresponding to the target character "A", and the caret CT in FIG.
Figure 7 (b) shows the position to input the equivalent character.
) The caret CT has a size corresponding to the subscript to be input from now on, and indicates the position at which the subscript is input.

Here, when the operator inputs, for example, the character "2" from the keyboard, this character "2" is stored in the subscript element storage means 42, and the subscript adding means 45 creates an image of this subscript "2". Figure 7 (
c) A display display as shown in is obtained. Further, when the character "35" is input, the character string stored in the subscript element storage means 42 becomes the three characters "235", and a display as shown in FIG. 7(d) is obtained. Here, an instruction to end the subscript assignment work (in this example, C
If f) is input, the caret CT returns to its original size, and a character equivalent to the target character "A" can be input.

[0036] With this device, it is also possible to add another subscript to the subscript. For example, in the state shown in Figure 7(c),
If you further input the command 64, you will get a display as shown in Figure 7(e). That is, the caret CT becomes smaller and moves to the upper right position of the subscript "2". For example, if you enter the character "3",
This character "3" is assigned as a subscript (double subscript) to the subscript "2", and the display shown in FIG. 7(f) is obtained. If the command 64 is further input in this state, the caret CT becomes even smaller, and triple subscript input is also possible. Conversely, if you continue to input Cf from this state, the caret CT will move from the triple subscript position to the double subscript position,
Furthermore, the process returns to the normal subscript position, and finally the subscript adding work is completed. In this way, subscripts can be added in a nested structure.

Although the superscript by command 64 has been described above, the processing for other subscript commands is exactly the same. For example, subscripting with command 65:
Subscripts as shown in FIG. 7(g) are added, upper and lower subscripts by command 66 are subscripted as shown in FIG. 7(h), and lower front subscripts are added by command 67 as shown in FIG. Subscripts are added as shown. In addition, in the device of this embodiment, when adding a superscript or a bottom subscript, if multiple characters are input in sequence, the allocation position is corrected by scrolling to the left from the first input character. and the newly entered character is always the target character "A"
It is arranged so that it is close to .

5 Arithmetic expression Input processing of an arithmetic expression is performed by an arithmetic expression input recognition means 51 and an arithmetic expression element storage means 52 in the computer 100 in FIG.
, arithmetic expression structure storage means 53, position correction means 54, position instruction means 55, typesetting information storage means 56, arithmetic expression creation means 5
7, is performed by each component. When inputting a subscript, the operator inputs a predetermined arithmetic expression command (in this example, command 68) in the command screen 312 shown in FIG.
There are two options available: Σ as command 69 and Π as command 69). When this command is input from the mouse, the arithmetic expression input recognition means 51 recognizes that if any character or expression is input from then on until the instruction to finish creating the arithmetic expression (in this embodiment, the Cf code is input). Then, this input character or expression is recognized as an element within the arithmetic expression. Here, the elements in an arithmetic expression are characters or expressions that are stored in the element in an arithmetic expression storage means 52 and are to be allocated around an arithmetic symbol. Further, an input instruction code is used as a code for specifying the allocation position of the element within this arithmetic expression. In this embodiment, two types of codes, control f (Cf) and control b (Cb), are prepared as input instruction codes.

The arithmetic expression structure storage means 53 stores an arithmetic symbol used in each arithmetic expression and a plurality of positions defined for this arithmetic symbol. For example, for the arithmetic expression Σ that calculates a sum, the operator symbol ``Σ'' and this ``Σ''
'', three positions defined as shown in FIG. 8(a) are stored. These three positions correspond to areas for allocating characters and expressions in the arithmetic expression Σ. In addition to this, the apparatus of this embodiment also stores the operation symbol and the position related to the operation expression Π for calculating the product. Further, in the formatting information storage means 56, formatting information (layout position, character size, etc.) for each of these positions is stored. The position indicating means 55 has a function of indicating one of a plurality of defined positions. For example, in the case of the arithmetic expression Σ mentioned above,
One of the positions ■, ■, ■ will be designated. The position correction means 54 has a function of correcting the position indicated by the position instruction means 55 based on the input instruction code recognized by the arithmetic expression input recognition means 51. As described above, in this embodiment, two input instruction codes, Cf and Cb, are prepared, but the position indicated by the position indicating means 55 changes from ■→■→ It is modified in ascending order as ■, and each time Cb is input, it is modified in descending order as ■→■→■.

The element-in-arithmetic-expression storage means 52 has storage areas corresponding to a plurality of positions, and stores the element in the arithmetic-expression recognized by the expression input means 51 in the memory corresponding to the position indicated by the position indication means 55. Store in area. Then, the arithmetic expression creation means 57 stores the arithmetic expression elements stored in the corresponding storage areas in the arithmetic expression element storage means 52 at each of the plurality of positions defined regarding the arithmetic symbols, in the formatting information storage. The layout is performed based on the corresponding typesetting information in the means 56, and an image of the arithmetic expression consisting of the arithmetic symbol and the elements within the arithmetic expression is created. The image created in this way is output by the output means 30.
Output by 0.

Next, the processing of inputting an arithmetic expression will be explained with reference to a specific example shown in FIG. As mentioned above, for the operation symbol "Σ", three positions ■, ■, ■ are defined as shown in FIG. 8(a). Figure 8(b) to (g
) is a diagram showing the transition of the document screen 311 during input work for this arithmetic expression Σ. First, the operator inputs a command 68 using the mouse. Based on this command 68, the arithmetic expression input recognition means 51 recognizes the start of the input work regarding the arithmetic expression Σ, recognizes the characters or expressions input thereafter as elements in the arithmetic expression, and stores them in the element storage means 52 for the arithmetic expression. Store. As described above, in this embodiment, two codes, Cf and Cb, are used as input instruction codes, so when these two codes are input, they are provided to the position correction means 54.

As described above, when the command 68 instructs to start inputting the arithmetic expression Σ, the arithmetic expression creation means 57 creates an image of the arithmetic symbol "Σ" stored in the arithmetic expression structure storage means 53. The output means 300
to be displayed on the display screen. In this initial state, the position indicating means 55 indicates position (2). In the device of this embodiment, the caret CT is displayed at the position indicated by the position indicating means 55, so in the initial state, the caret CT is displayed at the position ■ as shown in FIG. 8(b). CT is displayed. The size of this caret CT corresponds to the size of the character (defined in the formatting information storage means 56) allocated to this position ■.

If the character string "i=1" is input in the state shown in FIG. . At this time, the data will be stored in the storage area corresponding to the position (3) indicated by the position indicating means 55. The arithmetic expression creation means 57 stores this character string “i=1” in the formatting information storage means 56.
An allocated image is generated based on the formatting information regarding the position (■) of the arithmetic expression Σ stored in the image. In this way, the character string "i=1" is assigned to the position ■, and the display becomes as shown in FIG. 8(c).

[0044] When the input of the characters to be assigned to position ■ is completed in this way, the operator inputs the input instruction code Cf.
Enter. This code is given to the position correcting means 54, and the position indicated by the position indicating means 55 is corrected in ascending order. That is, the position indicating means 55 now indicates the position ■. Therefore, the caret CT moves to position 3, and the display becomes as shown in FIG. 8(d). Subsequently, if the character "k" is input, this character is stored in the storage area corresponding to the position (■) in the arithmetic expression element storage means 52. The arithmetic expression creation means 57 uses this "k"
An image is generated in which characters are laid out based on the formatting information regarding the position (■) of the arithmetic expression Σ stored in the formatting information storage means 56. In this way, the character "k" is assigned to position ■, and the display is shown in Figure 8 (e
) become that way.

[0045] When the input of the character to be assigned to position (3) is thus completed, the operator inputs the input instruction code Cf again. This code is given to the position correcting means 54, and the position indicated by the position indicating means 55 is corrected in ascending order. That is, the position indicating means 55 now indicates the position ■. Therefore, caret CT is at position ■
(the size also changes), and the display becomes as shown in FIG. 8(f). Next, if we input the character "Ai"("i" is input by inputting the subscript described above), this character is stored in the storage area corresponding to the position ■ in the calculation formula element storage means 52. Ru. The arithmetic expression creation means 57 generates an image in which the character "Ai" is allocated based on the forme information about the position (■) of the arithmetic expression Σ stored in the forme information storage means 56. In this way, the character "Ai" is assigned to the position ■, and the display becomes as shown in FIG. 8(g). Finally, an instruction to finish creating the arithmetic expression (in this example, C
f), this task is completed.

[0046] In the above work, input Cf and set the position ■
Although the character string was input in the order of →■→■, it is also possible to send the character string in the reverse order of the position ■→■→■ by inputting Cb. Therefore, while inputting position ■, position ■
If you realize that the character you entered was incorrect, you can input Cb again to re-enter the position ■.

[0047] In the above embodiment, an example was given for the arithmetic expression Σ for calculating a sum, but the same operation can be performed for an arithmetic expression Π for calculating a product. In addition, Fig. 8 (h)
It is also possible to define the positions ■, ■ for the calculation formula C that calculates the combination as shown in Figure 8(i), or to define the positions ■, ■, ■ for the integral calculation formula as shown in Figure 8(i). You can also do it. In addition to this, it is possible to define various calculation expressions.

Although the present invention has been described above based on the illustrated embodiment, the present invention is not limited to this embodiment, and can be implemented in various other ways. In particular, the block diagram shown in FIG. 1 is a functional block diagram showing this device divided into five functions (fractional expression, expression including radical, determinant, subscript, and arithmetic expression) for convenience of explanation. The actual hardware and software configurations are not limited to this block diagram. In practice, these five functions not only function individually, but also function in combination with each other. For example, it is possible to assign a fractional expression or an expression containing a radical sign to the arithmetic expression Σ. Furthermore, the block diagram in Figure 1 shows only the components necessary to perform the five functions described above, and in reality, each of these block elements is part of a general document creation device. It will be incorporated and used.

[0049]

As described above, according to the document creation device of the present invention, documents containing fractional expressions, expressions containing radicals, determinants, subscripts, arithmetic expressions, etc. can be easily created.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of a document creation device including mathematical formulas according to the present invention.

FIG. 2 is a diagram showing an example of a display screen of a display in the apparatus shown in FIG. 1;

FIG. 3 is a diagram showing an example of the command screen shown in FIG. 2;

FIG. 4 is a display screen diagram showing a fractional expression input operation in the apparatus shown in FIG. 1;

FIG. 5 is a display screen diagram showing an input operation of an expression including a radical in the apparatus shown in FIG. 1;

6 is a display screen diagram showing a determinant input operation in the apparatus shown in FIG. 1; FIG.

7 is a display screen diagram showing a subscript input operation in the apparatus shown in FIG. 1; FIG.

FIG. 8 is a display screen diagram showing an operation of inputting an arithmetic expression in the apparatus shown in FIG. 1;

[Explanation of symbols]

11...Fraction input recognition means 12...Numerator part storage means 13...Denominator part storage means 14...Dividing line generation means 15...Fraction formula creation means 21...Radical input recognition means 22...Radical element storage means 23...Radical symbol Generation means 24...Radical expression creation means 31...Determinant input recognition means 32...Determinant element storage means 33...Determinant frame symbol generation means 34...Determinant equation creation means 41...Subscript input recognition means 42...Subscript element storage means 43...Size determination means 44...Allocation position determination means 45...Subscript adding means 51...Arithmetic expression input recognition means 52...Equation element storage means 53...Arithmetic expression structure storage means 54...Position correction means 55...Position indicating means 56 ... Formatting information storage means 57 ... Arithmetic formula creation means 61 to 69 ... Command 100 ... Computer 200 ... Input means (keyboard/mouse) 300 ... Output means (display/printer) 310 ... Display screen 311 ... Document screen 312 ... Command screen CT …Caret MC…Mouse cursor

Claims (5)

[Claims] Claim 1: When a character or expression is input together with a division code between the instruction to start creating a fractional expression and the instruction to end the creation, the input character or expression is divided into the numerator part using the division code as a boundary. fraction input recognition means for separately recognizing the characters and denominator parts; numerator part storage means for storing the characters or expressions recognized as the numerator part; and denominator part storage means for storing the characters or expressions recognized as the denominator part. a lateral length of the molecular part stored in the molecular part storage means;
dividing line generating means for comparing the horizontal length of the denominator stored in the denominator storing means and generating a denominator dividing line having a length corresponding to the longer one; and the numerator storing means. a numerator part stored in the denominator part storage means, a denominator part stored in the denominator part storage means, and a denominator/child dividing line generated by the dividing line generating means to create an image of a fractional expression. 1. A device for creating a document containing a mathematical formula, comprising: a mathematical formula creating means; and an output means for outputting an image of the created fractional formula. [Claim 2] When a character or expression is input between the instruction to start creating a mathematical expression that includes a radical and the instruction to end the creation, a root that recognizes the input character or expression as an element within the radical. a radical symbol input recognition means, a radical symbol element storage means for storing a character or an expression recognized as the radical symbol element, and a horizontal length of the radical symbol element stored in the radical symbol element storage means; radical symbol generating means for determining the length in the vertical direction and generating a radical symbol having a horizontal length and a vertical length corresponding to the determined length; a radical expression generating means for synthesizing the radical symbol elements generated by the radical symbol generating means and the radical symbol generated by the radical symbol generating means to create an image of a mathematical expression including the radical symbol; An apparatus for creating a document containing a mathematical formula, comprising: an output means for outputting an image of the image. [Claim 3] Determinant input recognition means that recognizes the input character or formula as an element within the determinant when a character or formula is input between an instruction to start creating the determinant and an instruction to end the creation. and a determinant-internal-element storage means for storing characters or formulas recognized as the determinant-internal elements;
The horizontal and vertical lengths of the elements in the determinant stored in the determinant-in-element storage means are determined, and the determinant frame has the horizontal and vertical lengths corresponding to the determined horizontal and vertical lengths. A frame symbol generation means for generating a symbol, an element within the determinant stored in the element storage means within the determinant, and a determinant frame symbol generated by the frame symbol generation means are combined, and the determinant is generated by 1. An apparatus for creating a document containing a mathematical formula, comprising: a determinant creating means for creating an image; and an output means for outputting an image of the created determinant. [Claim 4] When an instruction to start a subscript assignment task is given, a target character to which a subscript is assigned and a subscript assignment position for this target character are recognized, and an instruction to end the subscript assignment task is given. subscript input recognition means that recognizes the characters or expressions input during the above as subscript elements; subscript element storage means that stores the characters or expressions recognized as the subscript elements; size determining means for determining the size of the subscript based on the size of the target character; allocation position determining means for determining the allocation position of the subscript based on the subscript assignment position recognized by the subscript input recognition means; The subscript element stored in the subscript element storage means is allocated to the allocation position determined by the allocation position determination means with the size determined by the size determination means, and a subscript is added to the target character. 1. A device for creating a document containing mathematical formulas, comprising: a subscript adding means for creating an image; and an output means for outputting the created image. [Claim 5] When a character, an expression, or a predetermined code is input between the instruction to start creating an arithmetic expression and the instruction to end the creation, the input character or expression is used as an element in the arithmetic expression and the specified code is input. an arithmetic expression input recognition means for recognizing each code as an input instruction code; an arithmetic expression structure storage means for storing an arithmetic symbol used in an arithmetic expression and a plurality of positions defined with respect to the arithmetic symbol; a forme information storage means for storing forme information for each of the positions; a position instructing means for instructing one of the plurality of positions; a position correcting means for correcting the position indicated by the indicating means; and a storage area corresponding to the plurality of positions; an arithmetic expression element storage means for storing in a corresponding storage area, and each of a plurality of positions defined for the arithmetic symbol;
The elements within the arithmetic expression stored in the corresponding storage area in the element storage means for the arithmetic expression are allocated based on the corresponding formatting information in the formatting information storage means, and the elements within the arithmetic expression What is claimed is: 1. An apparatus for creating a document containing a mathematical formula, comprising: a mathematical formula creating means for creating an image of the mathematical formula; and an output means for outputting the image of the created mathematical formula.