JPH01130249A - Expression arithmetic processor - Google Patents

Abstract

PURPOSE:To constitute the title processor so that a user can instruct the storage and read-out by only writing a symbol by discriminating whether the symbol is written on an expression written already or not and determining the storage or the storage call. CONSTITUTION:When DELTA is written on an expression, storage is executed, and in other case, storage read-out is executed. In case of storing the expression or a value, if there is a mark, =, a calculated value is stored, but unless there is the mark, =, the format of the expression, namely, all of a numeral and an operation code for constituting the expression are stored as it is. In case of executing the storage read-out, all the numerals and operation codes that have been stored are read out without minding the stored value or expression, and from a position where DELTA is written, the numeral and the operation code are outputted in order as if a user has inputted them. By said processing, when DELTAis written on the expression, it is stored, and when DELTA is written in a null place, the stored expression is developed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mathematical expression processing device that can input and process mathematical expressions as coordinate data.

[Conventional technology]

Conventionally, in an input/output integrated device such as the one shown in the embodiment of the mathematical expression recognition device filed by the present applicant as Japanese Patent Application No. 62-194311, in order to store expressions, values, etc., "
As in ``MiY'' (if you memorize it as a writing Y and later use Y in the formula,
It is configured so that the formulas and values stored in Y can be called up and used.

[Problem that the invention is trying to solve] However,
In the conventional example above, when you want to memorize the formula that has been written up to that point while inputting the formula, and then again store a new formula that has been added to the previous formula, you can use the "=" definition symbol and the definition variable in the middle of inputting the formula. , and if you wanted to add an expression, you had to erase the definition variable with "mi" before you could write it. Also, when defining or storing, write "mi" on the right side and write the defined variable name, and use only the defined variable name mentioned above for calling.
For users, this was troublesome and difficult to understand. Furthermore, even if a new definition is rewritten, the already written equations are not recalculated, so it is troublesome to rewrite the calculation equations again.

[Means (and effects) for solving the problem] According to the present invention, there is provided a means for determining whether a symbol such as ○, Δ, etc. is overwritten on a numerical formula or value; In the formula already written as the storage means for storing and the means for reading memory, mark ○,
By providing a detection means for detecting whether a symbol such as Δ is present and a recalculation means, if a specific symbol is drawn on an already written formula or value, the formula or value is memorized. , if the specific symbol is included in another formula that has already been written, recalculation is performed using the newly stored formula or value. Furthermore, when a specific symbol is written in a blank area, the symbol is used to read out an expression or value.

〔Example〕

FIG. 1 shows a first embodiment of the present invention, and is a drawing that best expresses the features of the present invention. In the figure, A is a display that performs the display shown in FIG. A possible digitizer, SIO, is a recognition means that recognizes numbers, operators, symbols, etc. from the coordinate point sequence from the digitizer. S20 is activated when the recognition result of the recognition means SIO is a symbol, and the SIO recognizes the input symbol position and information to be described later. From the information in the storage means IM,
A discriminating means for discriminating whether a symbol has been inputted over a mathematical formula or a number, S30, is activated when the symbol is inputted overlappingly as a result of the discriminating means, and stores the mathematical formula or numerical value that has already been input at the symbol position. Store in M. Similarly 3
40, after the storage operation, the information storage means I stores a mathematical formula that includes the input symbol from among the mathematical formulas that have already been input.
Search within M and recalculate the corresponding formula.

Further, if the result of the recognition means S10 is equal, S
50 is activated. S50 is a detecting means, which detects whether a symbol exists in a mathematical expression related to the recognition result "equal". If the result of the detection means S50 is that there is a symbol, the mathematical formula value reading means S60 is activated, reads out the contents of the memory M corresponding to the symbol, and replaces the symbol in the mathematical formula.

Further, the symbol-free side output of the detection means S50 and the result of the numerical formula value reading means S60 are connected to the calculation means S70 and calculated. Finally, as a result of the calculation means S70, the recognition means 51
The result when the result of 0 is neither symbol nor equal,
Output when the discrimination results of the discrimination means S20 do not overlap,
and the results of the recalculation means S40 are all stored in the information storage means IM.

Further, a part of the information means IM is connected to the display means A and is configured to be displayed.

FIG. 2 is a block diagram showing the configuration of this embodiment.
The same numbers for each part as shown in the figure are used.The present invention makes extensive use of control by a microprocessor, and C is for controlling the embodiment of the present invention and recognizing mathematical expressions from coordinate data input from a digitizer. SIO in control figure 1
- ROM in which programs such as control means of S70 are stored
, D is a working storage device RA necessary for performing the above control.
M includes the memory M1 information storage means IM in FIG. 1, and E is a central processing unit CPU that performs the control.

FIG. 3 is a data structure diagram of the information storage means IM of the RAMD in which the mathematical formulas shown in FIG. 7 are stored. Incidentally, the recognition of mathematical expressions, the creation of data, etc. are described in detail in the specification of Japanese Patent Application No. 194311/1982, so the explanation thereof will be omitted here. The data in the figure is the formula “3+5=8” in Figure 7, “△X
2=16" is stored as each number, operation code, and code position information, and the delimiter between expressions is '7FFF.
(Hex)” code. Also, the code “ooo” indicates the end of all data.

(Fax)" is used. These mathematical formula data are stored starting at address 2000 of the RAM address indicated by the address in the figure.The position information of the above code refers to the numbers and operators that are displayed. 16X16do used for
The position of the upper left corner of the font t on the screen is (x, y
) is expressed in coordinates.

FIG. 4 is a flowchart of storage processing in this embodiment,
The user inputs a △ symbol used for memorization and recall into the digitizer surface shown in FIG. 1B, and it is called when it is recognized as △. First, in step S21, the position coordinates S (x, y) of △
This S (x, y) is the center of the written △ (x,
y) coordinate, and in step S22 all data codes are 0 from address ♀000 in the formula data of FIG.
Compare with the position information of x+Y up to OOOH. The comparison is performed, for example, as x 1'<S (x) <x 1 +16. In other words, it is determined whether S (x, y) is included inside the 16×16 dot character font.

From address 2000 to end of all data Xn<S (X
)<Xn+16. Yn<S('Y)<yn+
If X n and Y n of 16 do not exist, the process moves to the input routine as if a normal numerical operator etc. were input. This applies to the case shown in Figure 7. Also, the above xn
+Y” exists, the process moves to step S30. In the case of FIG. 7a, x2172 in FIG.
Determine from the delimiter in the formula data in the figure, and
RA of the first diagram with the numerical code string written after that as the value
Store in △ storage area M in M. In the case of FIG. 7A, it is assumed that the equation from X21Y2 to addresses 2000 to 2015 in FIG.

Finally, in step S40, a recalculation routine is called, the answer to the equation in which Δ is used is changed, and all storage processing is completed.

FIG. 5 is a flowchart that operates when memory is recalled in this embodiment. When you write a mathematical formula and try to find the answer using "=",
Alternatively, it is called at the time of recalculation in step S40 in FIG. 4 above. First, in step S50, it is determined whether or not the calculation formula to be calculated contains △ from the numbers in the formula and the operation code. If not, the process moves to step S70, where normal calculations are performed and the process is completed. If the value is included, the process moves to step S60, the value stored in the memory M in step S30 of FIG. Next, in step S70, normal calculation processing is performed and all processing is completed.

FIG. 7 is a diagram showing a display state during one operation of a device embodying the present invention, and is a display example showing an example of the present invention, which is an input/output integrated device in which a transparent digitizer is superimposed on a liquid crystal display. In the figure, a is a triangle drawn on an already written mathematical formula, and is drawn to memorize the value of the formula. b is written to use the value of the formula memorized above,
When calculating the subsequently written formula, the memorized value is called up and the calculation is performed.

Also, draw other values in different places, and write △ on top of them as shown in figure a.
If you draw △, a new value will be stored in △, and as shown in the figure (the formula using △ will be recalculated, and the calculation result will be obtained using the new value.

As mentioned above, if you write △ on a formula or value that has already been written, you can memorize the value of that formula, and if you write it as part of a formula in a blank space, you can call the memorized value when you get the calculation result. I can do it. Also, if Δ is used in a formula written elsewhere at the time of memorization, recalculation can be performed.

In this example, △ was used as a symbol for memorization, but it can also be other symbols such as ○, ◎ 9 characters, special characters, etc., and only one type (or more than one can be used). It is easily achievable.

[Other Examples]

In the above embodiment, the memorized value is called at the time of recalculation or calculation, but in this embodiment, when a symbol is written in a blank area, it is immediately called and the value or expression is expanded. Ru. The configuration is all (same. 6th
The figure shows the memory of this example.

This is a processing flowchart of memory readout, which is called when the user writes "△" based on the input state of the mathematical expression. The operation will be briefly explained below according to the flowchart shown in FIG.

In the figure, steps S8 and 89 are steps 321. Since it is exactly the same as S22, the explanation will be omitted here. Therefore, if △ is written above the equation in step S9, the process advances to step S10 to perform storage; otherwise, the process advances to step Sll to perform storage reading. In step SIO, a formula or a value is stored. In this case, as in the previous embodiment, if there is an "=", the calculation is performed and the value is stored; however, if there is no "=", the formula is stored as it is, i.e. Memorize all the numerical operation codes that make up the formula. In step 311, memory reading is performed, and all the numbers and operation codes that have been memorized are read out without being aware of the stored values or formulas, and they are read from the position where "△" is written.
Outputs numbers and operation codes in the same order as if input by the user. This completes all processing.

By performing the above processing, if you write △ above an expression, it will be memorized, and if you write ∆ in a blank space, the memorized expression or numerical value will be immediately expanded as if it had been input, and the same expression, This is effective in saving time when entering numerical values repeatedly.

〔Effect of the invention〕

As explained above, by determining whether a symbol is written on an already written formula and deciding whether to store or recall the symbol, the user can store or read the symbol simply by writing it. It can provide a quick and easy operating environment for memory functions. In addition, convenient functions such as recalculation using a previously written formula and memorization while inputting a formula can be easily and intuitively operated in an interactive environment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the features of the present invention. FIG. 2 is a block diagram of an embodiment of the present invention. FIG. 3 is a diagram of the formula data configuration in the memory of an embodiment of the present invention. FIG. 4 is an embodiment of the present invention. FIG. 5 is a storage/read processing flow diagram of an embodiment of the present invention. FIG. 6 is a storage, read, and processing flow diagram of an embodiment of the present invention. FIG. 7 is a display input screen of an embodiment of the present invention. Example a is symbol input for memorization, and symbol input for memory readout.

Claims (2)

[Claims] (1) In a device that inputs mathematical formulas or numerical values from a coordinate input means and displays the processing results, at least a recognition means that recognizes that a specific symbol has been input, and a system that is related to the coordinate position where the symbol is input. A mathematical calculation process comprising: a determining means for determining whether a mathematical formula or numerical value has already been input at a position; and a storage control means for storing or reading out the mathematical formula or numerical value based on the result of the determining means. Device. (2) A first feature characterized in that when a mathematical formula including a symbol has already been input and memory information related to the symbol is redefined, the mathematical formula including the symbol is recalculated.
The mathematical expression processing device described in Section 1.