JPH01108670A - Mathematical formula input and edit system - Google Patents

Abstract

PURPOSE:To surely perform designation and to prevent a wasteful operation due to mis-designation, etc., from being performed in a character string designation processing at the time of performing an operation of insertion to a non- inputted argument, etc., by displaying the non-inputted argument. CONSTITUTION:The title system is realized by storing the number and the input order of the argument which belongs to an inputted function in a system in a process to generate a mathematical formula by a means to display a non- inputted mark at the display position of the non-inputted argument, or providing the argument and separating marks 215 and 217 to separate the argument and displaying the non-inputted mark at the position of the argument in a display processing when no character or character string is inputted and the separating marks 215 and 217 are inputted at the time of inputting the argument. The non-inputted mark is arranged so as not to be developed at the time of printing. In such a way, since it is possible to recognize the position visually at the time of inputting to a non-input position after the mathematical formula being generated, it is possible to reduce the error in the designation and to improve operability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to document creation devices such as Japanese word processors and native computers, and particularly to a mathematical formula input/edit method suitable for input/edit proofreading of mathematical formulas, etc.

[Conventional technology]

Although it was possible to create a formula, it did not take into account the operation of completing a series of formulas without inputting function arguments, etc. while creating a formula, and then attempting to input the missing arguments.

For example, n, which is the second argument of Σ, is displayed, and even if you try to input n after formula creation, the uninput position is not displayed, so the operator uses the mouse to visually search for the uninput position and input it. Or the editing position was specified. No consideration was given to the operation of creating a mathematical formula without inputting so-called undetermined parts, and then re-entering the uninputted parts after completing a series of formula creation.

[Problem that the invention seeks to solve]

In the conventional technology, no consideration was given to editing and re-inputting to the uninputted position, and the operator specified the uninputted position by visual estimation. There may be cases where the input position determined by the system does not match, and only after the string is entered or edited.
There was a problem in knowing the specification error.

An object of the present invention is to display the position of the uninputted part in formula input/editing, so that the operator can visually grasp the uninputted position, and to input characters or character strings into the uninputted position again. It is an object of the present invention to provide a formula input/editing method that reduces specification errors and enables early detection of errors during input.

[Means for solving problems]

The purpose of the above is that when a function, etc. is input when creating a mathematical formula, the system remembers the number of arguments, input order, and display position of the function, and prevents even one argument from being input to the function. This can be achieved by providing means for displaying an uninput mark at the display position of an uninput argument when displaying the function.

[Effect]

The method for displaying an uninput mark at the display position of an uninput argument is that when a function is input during the process of creating a formula, the system remembers the number, input order, and display position of the arguments attached to the function. Also, provide a delimiter to distinguish between arguments, and if no characters or character strings are entered when inputting an argument, but only a delimiter is entered, a non-input mark is displayed at the position of that argument during display processing. This can be achieved by Also, care should be taken not to expand this uninput mark when printing.

By displaying the uninput mark in this way, when inputting into an uninput position after creating a formula, you can visually grasp the position, which reduces specification errors when specifying. Improves sex.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a word processor will be described with reference to the drawings.

The mathematical formula targeted by the present invention is shown in FIG. 3(a).

The characters that make up a mathematical formula are divided into regular characters and mathematical symbols. A mathematical symbol is a symbol with a special meaning used in mathematics, and in Figure 3(a), it is Σ.

- (fractional bar), V, etc. A mathematical symbol (hereinafter referred to as a function symbol) has a string attached to it, as in the following, to form the meaning of a mathematical formula. The character string attached to this function symbol is called an argument, and the function symbol and its arguments together are called a function. A number of these functions come together to form a mathematical expression. Also, although the above-mentioned arguments may be just strings, they may contain other functions, forming a hierarchical structure. The data of these formulas are stored in the storage device 402, and the format is as shown in FIG.
It is stored in the form of first-class characters and functions, and delimiters 313 that identify hierarchical relationships.

However, formulas have a hierarchical structure. Figure 3(c) shows the hierarchical structure of the formula in Figure 3(a). When displaying a formula, the formula data in Figure 3(b) is expanded according to the hierarchical structure and each character is Column dimensions and coordinates need to be calculated.

Next, the hardware configuration of the present invention will be explained. FIG. 4 is a diagram showing the equipment configuration of the present invention. The hardware to which the present invention is applied includes an input device 401 such as a keyboard for inputting character strings, mathematical symbols, etc., a storage device 402 for storing character codes of input characters, and a CRT display for displaying character strings, etc. It is composed of a display device 403 and a control device 404 that controls each of the above sections.

Of these, the control device 404 will be explained in detail.

The control device 404 has a number input section 405. Formula display section 40
69 Character string specification section 407. It is composed of four mechanisms of the formula editing section 408.

(1) Mathematical formula input section 405 As described above, a mathematical formula is composed of a collection of character strings and functions. A function is formed by a function symbol and arguments, but the number and display position of the attached arguments differ depending on the function symbol. Therefore, the formula input unit 405 has a table (hereinafter simply referred to as an argument table) that summarizes the number of attached functions for all function symbols.

When the user inputs a function symbol from the input device 401, the formula input unit 405 calculates the number of arguments attached to the input function symbol from the argument table, displays the function symbol on the display device 403, and displays the first Takes argument input,
The operator inputs a character string constituting an argument, and inputs a delimiter at the end of the argument to indicate that one argument has ended. The formula input unit 405 takes in input arguments for the number of arguments determined from the argument table.The input function symbols, arguments, and delimiters are arranged in a line in the order of input as shown in FIG. 3(b). The information is stored in the storage device 402.

(2) Mathematical formula display section 406 In order to display mathematical formulas, instead of characters or lines with fixed sizes, two-dimensional areas of different sizes are basically considered, and these are displayed according to the type of mathematical symbols. They must be placed vertically or horizontally.

That is, it is necessary to set the size of an area (hereinafter referred to as argument area) for each function symbol and argument, and to arrange each argument at a fixed position depending on the type of function symbol. In this case, the method of arranging each function symbol is stored in the data section of the program.

This will be specifically explained using the following formula as an example.

Σ Xl i=1 The above formula is stored as the fifth formula data in the storage device 402
(b) Stored as shown. The number of arguments of the function symbol Σ is calculated from the argument table and it is found that there are 3 arguments, so i = 1 (512) is the first argument (522) and n (5
13) as the second argument (523), and XI (514) as the third argument.
Expand to argument (524) (Figure 5(c))
. Also, the placement of each argument is stored in the data section of the program, and it can be seen that the first argument is placed below Σ, the second argument is placed above Σ, and the third argument is placed to the right of Σ. .

Next, the coordinates for arranging each character string are calculated using the following calculation formula.

Define the size of the above argument area as follows.

Σ −1englx, lengthly (function symbol)
i=1...length2x, length2y (first argument) n...1eng3x, 1eng3y (second argument) X i -1eng4x, length4y
(Third argument) Also, each argument area has its own horizontal character string reference line (hereinafter referred to as the baseline), and these are used as base', base2, etc. as above. b
Assume ase3°base4.

First, Σ, i=1. The size of the area n and Xi is determined from each function symbol, the sum of the widths of the characters included in the argument, and the maximum value of the height. If the argument is not input, the size is fixed (hereinafter referred to as the uninput area).

The baseline varies depending on the type of function symbol, but character string...character string height Σ...(length to the bottom of Σ/2) + (normal character height/2) Fraction...Numerator 10 normal character height/2 uninput arguments...
- Set to the height of half-width characters.

In the above formula, each baseline is base=
(length/2) + (normal character height/2)
base2 = length2y base3 = 1eng3y base4 = length4y.

Next, change the above formula to Xi　　　　　　...b Divide it into 2 parts and calculate the size of each part using the following formula.

lengax=max (lenglx, 1eng2
x, length3x) length = length
+length2y+length3ylengthbx = 1e
ng4x lengthby” 1eng4y basea=1eng3y+baselbaseb=l
eng2y Based on the obtained data of a and b, set the position of each argument by arranging a and b so that each baseline coincides with the X direction (Figure 5(a)).

In the above processing, if there is a function among the arguments and the size of the argument cannot be determined, the size of the inner function is determined using the same procedure, and then the size of the argument is calculated.

If the hierarchical structure of the function is deeper, the process is repeated while performing recursive calls until the size of the argument to be determined is determined, and the size and coordinates of the argument are determined.

(3) Character string specification section 407 When a part of the mathematical expression displayed by the mathematical expression display section 406 is specified using the input device 401, the specified character or function symbol is located in the data stored in the storage device 404. Search for

(4) Numerical formula editing section 408 Edits the characters or arguments obtained by the character string specifying section 407, such as insertion and correction. The input method is the same as the character string input section, and when storing in the storage device 402, the re-input character string data is inserted into the specified character string position.

Next, in the apparatus comprising the above mechanism, the specific contents of this embodiment will be explained using the processing flow diagram in FIG. 1 and the mathematical formula expansion examples in FIGS. 2(a) to 2(c).

In this mathematical formula display process, uninput arguments were displayed with country marks. The formula in FIG. 2(a) is stored in the storage device 402.
is stored as shown in FIG. 2(b). Step 10
1 is the mathematical formula data (second
(b)) is the process of expanding and arranging the
6 takes out the data in FIG. 2(b) and develops it as shown in FIG. 2(c). Here, to expand the argument of the function symbol Σ (213), first, K=1 (214) is the first argument of Σ (
224), and then find the second argument, but since the delimiters 215 and 217 are consecutive,
It turns out that the second argument has not been input, and the uninput mark (2
26), and then expands Xi (218) as the third argument (228). The formula display section (406) displays the formula developed in this way in the (2) formula display section 40.
The coordinate calculation described in section 6 is performed (step 102).

Next, in step 103, a display discrimination process is performed. This is because function notations Σ, H, J, f, etc. usually need to be displayed in different sizes to distinguish them from character strings. Steps 104 to 107 are processes for displaying the respective function symbols and character strings (specifically, developing character patterns into bitmap memory and returning control to display and print processing); 109 is a process related to displaying uninputted arguments; in the case of display on the screen, an uninputted mark is displayed; in the case of printing, the uninputted argument is not displayed.

Next, a method for inserting a character string into a non-input section in a device having the above mechanism will be described.

Move the cursor over the figure mark of the formula entered in the formula input section and press the Insert> key. A special mark is displayed (black and white reversed) and the mode enters character string input mode. Therefore,
Enter the character string or mathematical symbol you want to re-enter, and press <Execute>
The insertion process ends by pressing the key.

Although the present invention has been explained using mathematical formulas as an example, it is clear that the present invention can also be applied to inputting chemical formulas and musical scores.

〔Effect of the invention〕

According to the present invention, by displaying uninputted arguments, reliable specification can be performed in character string specification processing when inserting into the uninputted arguments, etc., and unnecessary operations due to specification mistakes can be prevented. is effective.

[Brief explanation of the drawing]

FIG. 1 is a flow diagram of the present invention, and FIG. 2(a) to (c)
The figure is a diagram showing data development when displaying uninput arguments according to the present invention. FIG. 3(a) shows an example of a mathematical formula handled by the present invention, and FIG. 3(b) shows the data in FIG. 3(c).
The figure shows its hierarchical structure. FIG. 4 shows a hardware configuration to which the present invention is applied. 5(a) to 5(C) show how to obtain the display coordinates of a mathematical formula in the present invention.

Claims (1)

[Claims] 1. Enter mathematical symbols and character strings (arguments) of coefficients in a hierarchical relationship with them in a document creation device that creates or edits and proofreads documents according to instructions from an input device and displays document information on a display device. In a document creation method having a means for storing the hierarchical relationship, and a means for correcting a formula input by the input means, an uninput mark is displayed at a position of an uninput argument among arguments in a hierarchical relationship. A method for inputting and editing mathematical formulas, characterized in that when inputting and editing the mathematical symbols, characters, or character strings, a non-input position is clearly indicated and input to the non-input position is facilitated.