JPH049637Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a graph output device that outputs a graph of a plurality of stored data.

[Prior art and its problems]

Conventionally, in a printing device having the above-mentioned functions, when printing various types of data in a graph according to the amount of data, the printing scale of the graph is automatically set according to the maximum value of the data. Further, when the maximum value or minimum value of the print scale is specified by manual operation, the print scale is set based on this specified value.

FIG. 1 shows an example of printing each piece of data shown in a list map in the form of a bar graph using the conventional printing device. However, when the values of all data are very close as in this example, it is extremely difficult to compare each data as can be seen from the graph. On the other hand, if the printing scale is set by manually specifying the minimum value of the printing scale, it is necessary to carefully consider what value should be selected as the minimum value, and Inputting and specifying values manually is extremely troublesome.

[Purpose of invention]

This idea was developed against the background of the above-mentioned circumstances, and its purpose is to output a graph that automatically selects the graph output in the form that makes it easiest to compare each piece of data, depending on the values of all data. The goal is to provide equipment.

[Example of idea]

This invention will be specifically explained below based on an embodiment shown in FIGS. 2 to 4. FIG. 2 is a block circuit diagram of a small electronic calculator equipped with a thermal printer. In the figure, numeral 1 is a key input section, including numeric keys, various calculation keys, etc. (not shown)
In addition, key 1a for specifying data list printing
and a key 1b for specifying graph printing. When a key is operated in this key input section 1, the key input data corresponding to the operated key is sent to the CPU.
(central processing unit) 2.

The CPU 2 is composed of a microprocessor that controls various operations, and based on microprogram instructions stored in a ROM (read-only memory), it processes the CN (control unit), RAM (AV, M,
Random access memory with various registers such as m, a, D and X, Y, △AV) and
Performs various calculation control of ALU (calculation unit) and
It sends and receives data to and from the data storage section 3 comprised of the following, and also sends print data or display data to the print control section 4 or display control section 5.

The print control unit 4 writes the data transferred from the CPU 2 into the V and S memories, and also outputs character designation data to the character decoder 6. In addition, this print control section 4
outputs a platen drive signal to the platen drive section 7 and a head drive section signal to the head drive section 8 in accordance with the print command output from the CPU 2. According to these drive signals, the platen drive unit 7 rotates the platen 9 on which the thermal recording paper is wound in the forward direction, and the head drive unit 8 rotates the platen 9 on which the thermal recording paper is wound.
Thermal head 10 equipped with 7 printing elements
is moved back and forth along the width direction of the recording paper. Further, this thermal head 10 has character dot pattern data corresponding to the character data decoded by the character decoder 6.
The dot pattern data is sequentially read from the character generator 11, and printing is performed based on this dot pattern data. In the character generator 11, dot pattern data corresponding to each character such as letters and numbers is stored, as well as dot pattern data that is the basis for printing a bar graph in the right direction and a bar graph in the left direction. , storage area
Stored in S ₁ and S ₂ .

On the other hand, the display data input to the display control section 5 is converted into a format suitable for display and displayed on the display section 12.

Next, the operation of the small computer configured as described above will be explained.

First, as shown in the list map in Figure 1,
The data of the month and the sales data at that time are written in the data storage section 3, and then when the key 1b for designating graph printing is operated, the process according to the flowchart of FIG. 3 is executed. step
At _A1 , an average value for all sales data stored in the data storage section 3 is calculated and written to the AV register. Next, in step _A2 , the errors between each sales data in the data storage section 3 and the average value data stored in the AV register are individually compared, and among the sequentially calculated errors, the largest in the positive direction is The absolute value of the error and the maximum error in the negative direction are written to the M and m registers, respectively. Then,
The data size of one division of the vertical axis printing scale (in this case, the vertical axis printing scale has graduations at positions divided into 40 equal parts along the width direction of the recording paper) is determined and written to the a register ( Step A ₃ ,
Here, "4/5" indicates rounding to the nearest 4. Then X
Data indicating the positions of the left end and right end of the print scale is written to the register and the Y register (steps A ₄ and A ₅ ). After this, in step A ₆ ,
The scale of the vertical axis is printed based on the contents of the Y and a registers. Here, the "initial position" is the position where the thermal head 10 is at the left edge of the recording paper,
At this time, data "-Xxa" is printed. In the process of the thermal head 10 moving rightward, data "0" is printed at the scale "X" position, and data "Y×a" is printed at the scale "X+Y" position (right edge of the recording paper). ” will be printed. Thereafter, the thermal head 10 at the right end of the recording paper is moved to the position of the scale "X", that is, the position where the error from the average value data is "0" (step _A7 ).

Next, the process moves to step _A8 , and the data storage section 3
The first data among the sales data within is read out and written to the D register. After this, the error between the data in this D register and the average value data is calculated and written to the △AV register (step
_A3 ). Then, in the next step _A10 , it is determined whether ΔAV is positive or not, and if it is determined to be positive, the process moves to step _A11 . Memory S at step A ₁₁
Data “1” is written to
At _A12 , data for determining the amount of movement of the thermal head 10 is written into the memory V in accordance with the error stored in the ΔAV register. Said step
A If it is judged as “NO” in ₁₀ , proceed to step
At step _A13 , data "2" is written to the memory S, and at step _A14 , the thermal head 10 is written in accordance with the absolute value of the error stored in the ΔAV register.
Data for determining the amount of movement of is written to the memory V. After steps A ₁₂ and A ₁₄ , the process moves to step A ₁₅ . In step _A15 , a bar graph is printed based on the contents of memories S and V. In other words, the print control unit 4 moves the thermal head 10 in the direction according to the contents of the memory S (if "1", the right direction; if "2", the left direction).
to move by an amount based on the contents of memory V,
While outputting a drive signal to the head drive section 8, the storage area S1 or _S2 of the character generator 11 is specified based on the contents of the memory S to create a desired bar graph (even if the memory S is " ₁ "). Dot pattern data of a rightward bar graph (for example, a rightward bar graph, and a leftward bar graph if the memory S is "2") is output in synchronization with the driving of the thermal head 10.

After step A ₁₅ above, move on to step A ₁₆ .
It is determined whether reading of all the sales data stored in the data storage section 3 has been completed, and if the judgment is "NO", the process returns to step _A7 , and the sales data is read out in the next step _A8 . Step A ₁₆
If it is determined to be ``YES'', the graph printing process ends.

FIG. 4 shows an example of a bar graph printed based on the flowchart shown in FIG. 3 above. In other words, the average value of all sales data stored in the data storage unit 3 is calculated as "2000", and a bar graph showing the error for each month with this average value as "0" is printed for each month. be. in this way,
If a graph showing the error with respect to the average value can be printed for each month, it will be extremely easy to compare sales data for each month.

Figure 5 shows the sales data printed in Figure 4.
This figure shows a printing status diagram of another embodiment in which bar graph printing was performed by automatically setting the printing scale based on the maximum and minimum values of sales data, and in this case also a comparison of sales data for each month. becomes extremely easy.

In each of the above-mentioned embodiments, an example was shown in which a bar graph was used as the graph, but it goes without saying that printing using a line graph can be carried out in exactly the same manner.

[Effect of idea]

As explained in detail above, this idea extracts the maximum and minimum values from the data to be output as a graph, sets the upper and lower limits of the graph using these values, and outputs the graph. , it is possible to output a graph in a form that makes the differences between each data value most clear, making it extremely easy to compare data.

[Brief explanation of the drawing]

Fig. 1 is a graph printing state diagram using a conventional printing device, Figs. 2 to 4 show an embodiment of this invention, Fig. 2 is an overall block circuit diagram of a small electronic calculator with a printer, and Fig. 3 is a graph printing state diagram using a conventional printer. The figure is a flowchart for explaining the graph printing operation, Figure 4 is a graph printing state diagram printed by executing the flowchart in Figure 3, and Figure 5 is a graph created by the printing operation of another embodiment. It is a graph printing state diagram. 1...Key input section, 2...CPU, 3...Data storage section, 4...Print control section, 9...Thermal head, 10...Character generator, V, S...Memory.

Claims (1)

[Claims for Utility Model Registration] In a graph output device that stores a plurality of data and outputs the data in a graph based on the size of the data value, the data with the maximum value is extracted from the stored data and the upper limit setting means for setting the value of as the upper limit of the graph output range; lower limit setting means for extracting the minimum value data from the stored data and setting the value of the data as the lower limit of the graph output range; A graph output device comprising graph output means for graphing and outputting the stored data within a graph output range set by the setting means and the lower limit setting means.