JPS61275958A - Electronic calculator with graphic display function - Google Patents

Abstract

PURPOSE:To detect the operation of a specific key to generate and display a regression graph by performing the statistical calculation processing of input numerical values on a basis of preliminarily set X-axis and Y-axis ranges to obtain display plot data. CONSTITUTION:Input data from a key input part 1 is sent to a control part 20. The control part 20 stores various control programs and gives control commands and calculation data to a numerical formula storage part 19, an operating part 21, a numerical formula buffer 22, and a display buffer 23 and gives address data and read/write commands to a storage part 24 consisting of a RAM or the like. the display buffer 23 is address by data sent from the storage part 24 through an address decoder 25 to output and display data, which is written in a text display buffer 23a and a graph display buffer 23b, on a display part 26. The leftmost end and the rightmost end in the X-axis direction are set as a minimum value Xmin and a maximum value Xmax respectively, and those in the Y-axis direction are set as a minimum value Ymin and a maximum value Ymax, and coordinate positions are displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a small electronic calculator equipped with a graph display function.

[Prior art and its problems]

Conventionally, for example, Nogusonal Computer (Hasokon),
In electronic calculators such as pocket computers,
There is a RASIC program that can be created to display graphs by inputting data.

However, in the conventional small electronic calculators with graph display functions mentioned above, it is necessary to set up a dedicated graph program, which makes it difficult for people who are not familiar with programming to create graphs. Input operations are extremely troublesome even for humans.

[Purpose of the invention]

The present invention has been devised in view of the above points, and is a compact device equipped with a graph display function that can create statistical graphs with simple key operations and also create and display regression graphs based on the statistical graphs. The purpose is to provide electronic calculators.

[Key points of the invention]

According to the present invention, as statistical data is input, the points are plotted on an instant display section, and then a regression graph is created and displayed based on the data.

[First Embodiment of the Invention] The present invention will be described in detail below with reference to the drawings. In Fig. 1, numeral 1 indicates the key input section, including numeric key 2, function key 3, function key 4, "," key 5, ":" key 6, and G key.
rILph key 7, tth Ra for inputting range data
nge key 8, LR key 9 to specify statistical data memory
, Execution (EXE) key 10 for executing graph creation operations
゜DT key 11 to specify data input, CL key 12 to clear input data, L to instruct regression graph display
It is equipped with an ine 1 key 13. The input data from the key human power section 1 is sent to the control section 20. This control unit 20 stores various control programs,
While giving a sampling signal to the key human power section 1,
Control commands are given to the formula storage section 19, calculation section 21, formula buffer 22, and display buffer 23. The above control unit 2
0 provides calculation data to the calculation section 21 and formula buffer 22 in response to key operations of the key manual section I, and also provides address data and read/write commands to the storage section 24 constituted by a RAM or the like. Then, the calculation unit 21
It is connected to the formula storage section 19, the formula buffer 22, and the storage section 24. The above-mentioned mathematical formula sofa 22 also serves as an input buffer and temporarily stores human input data, and the mathematical formulas read from the mathematical formula storage section 19 are written therein. Furthermore, the data output from the calculation unit 21 is
It is sent to the display buffer 23. This display Nonotsufa 23
is from the text display buffer 23a and graph display buffer 23b, and from the storage unit 24 to the address decoder 2.
The data sent through the controller 5 specifies a sear address, and the data from the arithmetic unit 21 is written to the specified address.

The display buffer 23 is the text display buffer 2
3&, the data written in the graph display buffer 23b is output to the display section 26 and displayed. Display this data on display section 2
6 has a configuration in which the number of segments in the Y-axis direction is M, for example, 96, and the number of segments in the X-axis direction is N, for example, 64.
In the x-axis direction, the leftmost end is set as the minimum value Xm1n, the rightmost end as the maximum value
, y), the coordinate position is displayed using (x, y) data.

Therefore, the storage unit 24 includes a statistical data memory 31.
, A memory 32, B memory 33, previous put memory 3
4. This time plot memory 35, range data Xmin
, Xmax%Ymin, YmaxsX-axis scale descale data width) X5cale.

Y-axis scale data (Y-axis scale width) Range memory 36 that stores range specification data such as Yacale, X memory 37 that stores X-axis data, Y memory 38 that stores Y-axis data, X memory 39, calculation data memory 40 are provided.

Next, the operation of the above embodiment will be explained. First, the operation when plotting statistical data will be explained according to the flowchart of FIG. First, as shown in Stella 7'AJ in Fig. 2, press number key 2 and Range key 8.
Set the range and scale of the X@ and Y axes. That is, when the Range key 8 is operated, the range setting items are displayed on the display section 26, so that
Input data in the order of x, -Ymax, Yacale. The above range data is sent from the control section 20 to the storage section 24 and written into the range memory 36. Next, the two-variable statistical data is input using the numeric key 2 and the DT key 11. In this case, depending on the type of regression,
, Y input statistical data.

Linear regression To delete data, operate the CL key 12t instead of the DT key 11. Then, the above input data
, Y are sent to the formula buffer 22 and temporarily stored.

On the other hand, the control unit 20 waits in step A2 until the data X and Y are input, and when the data is input, it advances to Stella fk3 and checks which of the D'r key 11 and the CL key 12 was operated. If the DT key 11 has been operated, the process proceeds to step A4. In this step A4, the input X.

The Y data is input to the statistical data memory 31, and statistical calculation processing of data input times n1ΣX1ΣY1Σxy, ΣX is performed. Thereafter, in steps A5 and A6, the above data x and yt-x memory 37 and Y memory 38 are stored, respectively. Thereafter, the calculation shown in step A7 is performed to calculate the position data X in the X-axis direction, and the data is written into the current plot memory 35 in step A8.

Next, as shown in step A9, By calculating data Y&C, do in the Y-axis direction.

Calculate the point position y. Next, as shown in Stella fklO, the nine dot position data (x, y) calculated in steps A7 and A9 are written into the graph display buffer 23b. Then, in the Stella fA11, the graph display buffer 23b
According to the contents of the display section 26 as shown in FIG.
Proceed to the top (point A). Thereafter, plots are displayed in the same manner according to the input data X, YK.

Further, when clearing the X and Y data stored in the statistical data memory 31, after inputting the corresponding data using the numeric keys 2, the CL key 12 is operated. This CL key 1
2 is operated, Stella fk1 starts from step A3.
2, the X and Y data are deleted from the statistical data memory 31. That is, the contents of X and Y input from n1ΣX1ΣY, ΣXY, and ΣX are deleted. Then, in steps k13 to AJ7, the x1y data is obtained in the same manner as in the Stella 7''A5 to A9, and as shown in step 118, the data (x,
y) is deleted (reversed), and (x
, y) is turned off.

When creating a regression graph, input data X and Y are plotted and displayed as described above, and the Line 1 key 13 is operated in the friend state. This Line
The operation of the 1 key 13 is detected in step 119 following step AJJ in FIG.
If the Line key 13 is not operated, step A
Return to step 2 and prepare for the next input data.

Next, details of the regression graph creation process in step A20 will be explained with reference to the flowchart of FIG. first,
As shown in step B1, the X memory 39 in the storage section 24
Initialize the contents of , that is, set it to "1". Next, the coefficient B of the regression line is calculated by the calculation shown in step B2, and stored in the B memory 33 in the storage section 24 in step B3. In step B2 above, the values of X and Y in the formula are the input data X and Y used as they are in the case of linear regression, but in the case of logarithmic regression, exponential regression, and power-law regression, the values shown below are used. is used.

Logarithmic regression...X - + Logarithm of the XO value Y - + Value of Y Exponential regression...' - Logarithm of the value of y Thereafter, the constant term A of the regression equation is obtained by the calculation shown in step B4, and is stored in the A memory 32 in step B5. Next, as shown in step B6, the above A and B are input into the formula storage section 19, and the regression formula rY=F'(X)J is set. This regression formula depends on the type of regression: linear regression...Y-A+BX logarithmic regression-Y-A+B-tn X-exponential regression...
Y=AaeBX Power regression...Y=A-X". Next, in step B7, the above regression formula rY-
Input F(X)J into the formula buffer 22. Then, the actual value X at the dot position X is determined by the calculation shown in step B8, and is stored in the X memory 37 in step B9. After that, Stella fB10. In Bll, the value of Y is determined by the calculation rY=F'(X)J and stored in the Y memory 38. Furthermore, in step B12, the dot position y is determined by the following calculation. Then, in steps B13 and B14, the data (X).

y) is input into the plot memory 35 this time, and then input into the graph display buffer 23b. Then step B15VC
As shown, it is determined whether the data held in the X memory 39 is "1" or not, and if it is not "1", the process proceeds to step B16 and the current plot held in the current plot memory 35 and previous plot memory 34 is compared. Find the dot (p=q) that connects the dots that were lit last time, and use Stella fB1.
7, the data is input to the graph display buffer 23b.

Thereafter, in step BIB, a graph is displayed on the display section 26 as shown in FIG. 3(c) according to the contents of the graph display buffer 23b. Note that FIG. 3 (, ) shows a display example regarding linear regression. If it is determined in step B15 that the content of the memory 39 is "1", the process immediately proceeds to step BIB to display the starting point position in a graph. Then step B19
At step B20, it is determined whether or not the content X of the X memory 39 is equal to the total number of bits M in the X-axis direction.

The data is written in the y0 memory, and the (Xo+)'o) data is further transferred to the previous plotting memory 34 in step B21. Then, as shown in 7°B22, rx6+I
The data of J is written into the X memory 39 and the process returns to step B8. Thereafter, similar operations are repeated to create a regression graph as shown in FIG. 3(c) based on each x and y data.

If the content X of the X memory 39 reaches the value M, the determination result in step B19 becomes Yes and the graph creation process ends.

[Second embodiment of the invention] Next, a second embodiment of the present invention will be described.

In statistical processing, you may also enter frequencies.
r Xl e 3'l; nl DT J, then (xl.

The purpose is to input n□ pieces of data called yl).
In this case, if each (x, -y) point is given a weight of n, it is possible to plot such statistical data with frequencies. FIG. 4 shows an example in which it is possible to plot statistical data with frequencies, in which the storage capacity of the address corresponding to one pit of the display section 26 in the graph display buffer 23b is set to, for example, 4 bits, and the data at that dot is The frequency is stored and the display command is not output only when the content of the address is oooo'. Since the rest of the structure is the same as that of the first embodiment shown in FIG. 1, the same reference numerals as in FIG. 1 will be used and detailed explanation will be omitted.

Next, the operation of the second embodiment will be explained with reference to the flowchart shown in FIG. First, in the stage AZIC of FIG. 6, the ranges and scales of the X-axis and Y-axis are set in the same manner as in the first embodiment. Next, as shown in step A2, it is determined whether or not data X, Y, and m have been input. If data has been input, the process advances to step A3. This station, PuA
3, it is determined whether the DT key 11 or the CL key 12 has been operated, and if the DT key 11 has been operated, the first
The processes of steps A4 to A9 are executed in the same manner as in the embodiment.

Then, in step 121, the value of y obtained in step A9 is
At this time, the current time is written to the memory 35 in the storage unit 24. Next, the process advances to step 122, and the data m at (x, y) in the graph display buffer 23b is read out to the calculation unit 21. Then, as shown in step 7''123, the currently input nine degree data m is added to the read data m, and the addition result is written to (x=y) of the graph display buffer 23b in step A24. , when only data x and Y are input and frequency data m is not input, "+1" is added to data m in the graph display buffer 23b. Next, as shown in step 25, display processing is performed according to the contents of the graph display buffer 23b, and then the process proceeds to step fA19, where it is determined whether the Llns 1 key 13 has been operated. If the Line 1 key 13 is not operated, the process returns to step A2 to prepare for the next data input, but the Line 1 key 13 is not operated. If key Z3 is being operated, the process advances to step A20 and the regression graph creation process shown in FIG. 4 is executed.

On the other hand, if the operation of the CL key 12 is detected in step A3, step AI2 is performed as in the first embodiment.
- AJ7 are executed, and the value of data y obtained in step AJ7 is written in the current f lot memory 35 in step 126. Then, as shown in step A27, the data m at (x, y) in the graph display buffer 23b is
is read out to the arithmetic unit 21, and in step 12B, the frequency data m input this time is subtracted from the data m. Then, the above subtraction result m is written to (xy) of the graph display buffer 23b as shown in step Aj9, and the contents of the graph display buffer 23b are displayed on the data display section 26 in step AJ5. Thereafter, the statistical data with frequencies can be plotted and displayed by similar processing.

In the second embodiment, the graph display buffer 23b has the weight of the same data, and the friend stores all the input data in the statistical data memory 31 and counts the weight when the same data is input. You can also try to remember it.

〔Effect of the invention〕

As detailed above, according to the present invention, the preset
Based on the axis range and Y-axis range, statistical calculation processing is performed on the input numerical values to obtain display plot data, and then, when a specific key is operated, the operation of the specific key is detected and a regression graph is created. Since I made it to display,
.

When Y data is input, it can be immediately plotted on the display, and the distribution of this data can be easily recognized visually as well as input. After data is plotted, a regression graph can be displayed on the display by pressing a specific key, so it is easy to understand the status of statistical distribution, such as the regression status and comparison of the regression graph with the actual r-event distribution. can do.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a block diagram showing the circuit configuration, FIG. 2 is a flowchart showing statistical data plotting operation, and FIG. ) to (c) are diagrams showing examples of graph display, FIG. 4 is a flowchart showing details of regression graph creation processing, FIG. 5 is a block diagram showing the circuit configuration in the second embodiment of the present invention, and FIG. It is a flowchart which shows the statistical data plotting processing operation of the same Example. 1...Key human power department, 2...Number key, 7...Gr
aph key, 8...Rings key, 9...I, R
Key, 1o...DT key, 1l-DT-IF-112
・CL key, 13...Lln・1 key, 19...
Formula storage unit, 2o...Control unit, 21...Calculation unit, 2
2... Formula buffer, 23... Display buffer, 23
a... Text display buffer, 23b... Graph display buffer, 24... Storage section, 25... Address decoder, 26... Display section, 31... Statistical data memory,
34... Previous plot memory, 35... Current plot memory, 36... Range memory, 37... X memory, 38... Y memory, 40... Calculation data memory. Applicant's agent Patent attorney Takehiko Suzue Figure 3

Claims (1)

[Claims] A means for inputting numerical data, a means for specifying graph creation, a display section for displaying the graph, a range memory for storing range data of numerical values that can be graphed for this display section, and settings for this range memory. means for calculating statistical graph data for the input numerical values based on the data; means for plotting and displaying the statistical graph data obtained by this means on the display section; A graph display function characterized by comprising means for performing regression calculation processing based on graph data to create regression graph data, and means for displaying the regression graph data created by this means on the display section. A small electronic calculator.