JPH0620058A - Method and device for plotting graph - Google Patents

Abstract

PURPOSE:To provide the device and the method for plotting graph which easily plot a scale having an arbitrary periodicity and are superior in flexibility. CONSTITUTION:The scale is plotted by a scale plotting means 3 based on a graph plotting condition of a graph plotting condition designating means 1 and periodicity data of an arbitrary scale stored in a scale periodicity storage means 2, and a numerical data string of a data input means 4 is plotted by a data plotting means 5, and a graph is displayed by a display means. When periodicity data is changed, a scale in another notation is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graph drawing apparatus and a graph drawing method for drawing a graph having a scale having an arbitrary periodicity using a computer.

[0002]

2. Description of the Related Art The periodicity of a scale drawn on a scale of a graph depends on the base system of the unit of data drawn on the graph. The decimal system is often used, but there are also unit systems based on the non-decimal number system such as time, angle, and imperial system. In the conventional graph drawing apparatus, the scale interval of the scale has been made variable for automatic scaling, but the periodicity of the scale has not been made variable in order to correspond to an arbitrary number system. It didn't come.

[0003]

As described above, in the conventional graph drawing apparatus and graph drawing method, in order to display a scale having an arbitrary different periodicity, the scale drawing means corresponds to the periodicity. However, there is a problem that flexibility is lacking because it is necessary to change the above or prepare another scale drawing means corresponding to the periodicity.

The present invention has been made in order to solve the above problems, and provides a graph drawing apparatus and a graph drawing method which can draw a scale having an arbitrary periodicity easily and have a great flexibility. With the goal.

[0005]

In a graph drawing apparatus according to the present invention, a graph drawing specifying unit specifies a graph drawing condition, and a scale periodicity storing unit stores periodicity data of an arbitrary scale. At least one cycle of an arbitrary scale is stored as one of the periodicity data, the scale drawing means draws a scale based on the graph drawing condition and the periodicity data, and the display means displays the scale and data input. The means inputs the numerical data string to be drawn as a graph, the data drawing means draws the numerical data, and the display means displays the data.

Also, in the scale periodicity storage means,
The display attribute of the scale line is specified for each cycle.

Further, in the scale periodicity storage means,
A priority is designated for each cycle, and a scale having a high priority is preferentially drawn by the scale drawing means.

Further, when the lengths of all the cycles stored in the scale periodicity storage means are expressed as an integral multiple of a certain unit length and all the cycles start from a common reference point, the scale drawing means Then, a P _i base counting means is provided for each period P _i , the count value of this counting means is set to 0 at the reference point, and the count value is incremented or decremented by 1 each time the position moves from this reference point by a unit length When there is at least one cycle in which the count value becomes 0 at a certain position, the scale corresponding to the one with the highest priority in this cycle is drawn at this position.

Further, in the scale periodicity storage means,
The priority of the cycle is shared by the cycles, and the higher the cycle, the higher the priority.

In the graph drawing method according to the present invention, in the graph drawing method, a scale is drawn based on the drawing condition of the graph and the periodicity data of the condition or an arbitrary scale preset and stored.

If there are a plurality of types of periodicity data, a scale having a high priority is drawn.

Further, the cycle priority is shared by the cycles, and the longer the cycle, the higher the priority.

[0013]

In the graph drawing apparatus according to the present invention, the scale periodicity data is stored in the scale periodicity storage means so that the scale drawing means can draw each cycle of the periodicity data based on the graph drawing condition and the periodicity data. It is possible to draw the scale of any scale by drawing the scale of each scale and arbitrarily changing the periodicity data stored in the scale periodicity storage means.

Further, by designating the display attribute of the scale line for each cycle, the display of the scale line for each cycle can be distinguished.

By designating a priority for each cycle and preferentially drawing a scale with a high priority, it is possible to draw a scale composed of a free combination of a plurality of cycles.

Further, by changing the count value of the counting means for each period in the scale drawing means, the scale can be sequentially determined, and the scale corresponding to the one having the highest priority is drawn at this position.

Further, the cycle priority is shared by the cycles, and the longer the cycle, the higher the priority, so that the storage capacity of the scale periodicity storage means can be made relatively small.

In the graph drawing method according to the present invention, the scale of any scale can be drawn by arbitrarily changing the periodicity data.

Further, even if there are a plurality of types of periodicity data,
It is possible to draw a scale with a high priority cycle.

Further, the cycle priority is shared by the cycles, and the storage capacity thereof can be small.

[0021]

【Example】

Example 1. FIG. 1 is an overall configuration diagram of a graph drawing device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a graph drawing condition designating means for designating a graph drawing condition, and arbitrary periodicity data in the drawing condition of the graph drawing condition designating means 1 is stored, or stored in advance if not specified. Scale periodicity storage means 3 which uses certain data as periodicity data, based on the graph drawing conditions designated by the graph drawing condition designation means 1 and the scale periodicity data stored in the scale periodicity storage means 2. Scale drawing means for drawing a scale.

Further, 4 is a data input means for inputting a numerical data string to be drawn as a graph, 5 is a data drawing means for drawing the numerical data string input by the data input means 4, and 6 is a scale drawing means 3. It is a display unit for displaying the drawn scale and the data drawn by the data drawing unit 5 in a graph. The graph drawing device is composed of the components indicated by reference numerals 1 to 6 in FIG.

FIG. 2 is a detailed flowchart showing the concept of the operation of drawing a graph by this graph drawing device. FIG. 3 is a detailed flowchart of the scale drawing in step III in FIG. 2 (a).

Next, referring to FIGS. 1 to 4, a first embodiment will be described.
The operation of will be described. In the graph drawing method according to the first embodiment, the graph drawing apparatus shown in FIG. 1 draws a graph as follows in accordance with the flowcharts of FIGS. FIG. 2A is a flowchart of the operation for drawing the scale of the graph. First, in step I, the graph drawing conditions are specified by the graph drawing condition specifying means 1 in FIG. Then, in step II, the scale periodicity data in the drawing condition is stored in the scale periodicity storage means 2.

In this case, unless otherwise specified for the scale periodicity data, the data previously stored in the scale periodicity storage means 2 is used as the scale periodicity data. Next, in step III, the scale drawing means 3 draws a scale based on the drawing conditions of the graph designated in step I and the periodicity data of the scale stored in step II. The screen is output on the CRT display.

FIG. 2B is a flow chart of the operation of drawing the numerical data to be drawn as a graph. In step V, the numerical data to be drawn as a graph is input in the data input means 4, and in step VI, this numerical data is converted into data suitable for the display form in the data drawing means 5 and drawn. Step it VII
Then, the display means 6 outputs the scale on the graph drawn in FIG.

As a concrete example of the graph drawing apparatus, the operation of drawing the scale of FIG. 4 will be described. First, in step I, graph drawing conditions are specified. Specifically, the graph drawing conditions are the maximum value and the minimum value of the coordinate axis on which the scale is drawn, the reference point and the periodicity data of the scale, and the periodicity data of the scale is specified as follows. First, a certain section is designated as a basic unit section, and then the length of the cycle is designated as an integral multiple of the basic unit section. In this case, the cycle starts from the reference point.

When the plotting condition of the graph and the periodicity data of the scale are thus defined, in the scale of FIG. 4, Max is the maximum value of the coordinate axes, Min is the minimum value, and Min is the reference point in this case. If d is specified as the basic unit section as the scale periodicity data, the period length can be specified as 3. Next, in step II, scale periodicity data is stored. In this case, only 1 is stored as the length of the scale period of the scale.

Next, in step III, the scale is drawn based on the drawing conditions of the graph and the periodicity data of the scale. The operation of drawing this scale will be described in detail. In step III, as shown in the flowchart of FIG. 3, it is judged whether or not a cycle exists between the minimum value and the maximum value of the coordinate axis (step 301). The distance from the reference point is an integer multiple of the length of the cycle of the basic unit section, and the scale is drawn at the cycle position at that cycle position (step 302). Repeat for the number of cycles of the periodicity data. This step III
And the scale is drawn. Actually, in the scale of FIG. 4, since the stored period is only 3 in length, the scale is drawn at a position where the distance from the reference point is an integral multiple of 3 × d.

In the first embodiment, the periodicity data stored in the scale periodicity storage means 2 is changed, for example, the periodicity data in the drawing condition in the graph drawing condition designating means 1 is changed, or the stored contents of the periodicity data is changed. Since it can be arbitrarily changed by changing, the scale based on an arbitrary determination method can be displayed.

Example 2. FIG. 5 is an explanatory diagram of a scale used for describing scale drawing. The configuration of the graph drawing device according to the second embodiment is the same as that of FIG. 1 except that the scale periodicity storage unit 2 shown in FIG. 1 has a function of designating the display attribute of the scale line for each period.

Next, the scale drawing operation of the second embodiment when the periodicity data has a plurality of cycles as shown in FIG. 5 will be described. As in the first embodiment, the graph drawing conditions include Max as the maximum value and M as the minimum value of the coordinate axes.
If in is designated as Min, the reference point is designated as Min, and scale periodicity data is designated as d as the basic unit section, the length of the scale period can be designated as 1, 3. That is, the scale of FIG. 5 is a combination of a scale having a period of 1 and a scale having a period of 3. Therefore, in the scale drawing of step III in FIG. 2 referred to in Example 2, first, a scale is drawn on the coordinate axis to be drawn as a scale having a cycle of 1 at a position where the distance from the reference point is an integral multiple of 1 × d. Then, as a scale with a cycle of 3, a scale is drawn at a position where the distance from the reference point is an integral multiple of 3 × d. In this way, the scale of FIG. 5 is drawn.

Example 3. FIG. 1 is also referred to in the third embodiment, and in FIG. 1, the scale periodicity storage means 2 is used.
In the above, the priority is designated for each cycle, and the scale drawing means 3 preferentially draws the high-priority scale, and the other configurations are the same as those in the second embodiment.

When the periodicity data has a plurality of cycles, there is always a position where the scales overlap in the scale drawing in FIG. 2 (a) step III. In that case, the priority of which scale is adopted If is set for each cycle, it is possible to specify the scale of the cycle to be prioritized at the position where the scales overlap. In the case of the second embodiment, the scale with the period of 3 is drawn with priority at the position where the scales overlap, but if the priority of the scale period is explicitly specified in this case, the scale of the periodicity data is changed. Table 1 below shows the columns of the cycle and the priority of the cycle.

[0035]

[Table 1]

Example 4. In the above embodiment, in the scale drawing operation in step III, the scale is drawn as shown in the flowchart of FIG. 3. Next, the scale drawing operation according to the flowchart of FIG. 6 will be described. With this method, the scales can be sequentially drawn. Here, the drawing of the scale of FIG. 4 used in the first embodiment, that is, FIG. 7 will be described as an example. The drawing conditions specified in the first embodiment are used as the drawing conditions for the scale graph of FIG.

In the graph drawing apparatus according to the fourth embodiment, the length of the cycle stored in the scale periodicity storage means 2 is represented as an integral multiple of a certain unit length in FIG. When the cycle starts from the reference point,
The scale drawing means 3 uses the respective cycles P _i (P in the fourth embodiment).
Each _i = 3) is provided with a P _i- adic counting means (for example, a ring counter or the like), and the count value of this counting means becomes 0 at the reference point, and the count value is incremented by 1 each time the position is moved from the reference point by a unit length. Then, a scale corresponding to the cycle in which the count value becomes 0 at a certain position every time the P _i advance is performed is drawn at that position.

Next, the operation of the fourth embodiment will be described mainly with reference to FIG. First, in step 601 of FIG. 6, one count is assigned to each period of the periodicity data of the scale. At this time, when the length of the cycle is P _i , a P _i- ary number is assigned. This count value is set to 0 at the reference point and is incremented by 1 each time the basic unit section moves in the positive direction. In the scale of FIG. 4, since the period length of the periodicity data of the scale is only 3, a ternary count is assigned to this period. Then, the count value with a cycle length of 3 is as shown by 701 in FIG. Here, using this count, the scale is drawn in order in the positive direction from the minimum value to the maximum value of the coordinate axis.

In step 602, the count value of each cycle at the minimum scale drawing position is calculated. The minimum scale drawing position is the position where the scale may be drawn between the minimum and maximum values of the coordinate axis, that is, the minimum value among the positions where the distance from the reference point is an integer multiple of the basic unit section. The position is close to (including the minimum value). In the scale of FIG. 7, the minimum scale drawing position is position 702. Since this position 702 is Min and Min is also a reference point, the count value at this position is 0.

Next, the count value of each cycle is examined at positions where the scale may be drawn in order from the minimum scale drawing position, and the scale is drawn by the following operation. First step 6
In 03, it is judged whether or not the count value of all cycles is 0 at a certain position, and if it is present, in step 604, the scale with the highest priority among the cycles of which count value is 0 is drawn. If not, the scale is not drawn at that position.

Next, at step 605, it is judged whether the position moved from that position in the positive direction by the basic unit section can be used for scale drawing, that is, whether it does not exceed the maximum value of the coordinate axis. finish. If not, go to the next step 606. In step 606, the count value of each cycle is incremented by one. And step 60
Returning to step 3, the scale drawing operation is performed at the position where the basic unit section has moved in the positive direction. This operation is repeated until the scale drawing operation is completed.

This operation will be examined on the actual scale of FIG. First, in step 603, the minimum scale position Min
Since the count value at 0 is 0, the process proceeds to step 604. In this case, since there is only one cycle, the scale of this cycle is drawn.
Next, at the step 605, the position 703 moved to the basic unit section
Can draw a scale, so the count value is set to 1 in step 606.
As it advances, the count value becomes 1. Returning to step 603,
Since there is no cycle in which the count value is 0, step 605 is skipped. Next, since the scale drawing is possible at the position 704 moved to the basic unit section, if the count value is advanced by 1 in step 606, the count value becomes 2.

Returning to step 603, since there is no cycle in which the count value is 0, step 605 is skipped. Next, since the scale drawing is possible at the position 705 moved to the basic unit section, if the count value is advanced by 1 in step 606, the count value returns to 0.
Returning to step 603, the count value is 0, so step 60
4, the scale is drawn at the position 705. This operation is repeated up to the position 706 (the closest position that does not exceed Max).

Example 5. Next, in this drawing method, as shown in FIG.
Let's look at the drawing operation of the scale. As the graph drawing conditions, if Max is specified as the maximum value of the coordinate axes, Min is specified as the minimum value, Min is specified as the reference point, and d is specified as the basic unit section as the periodicity data of the scale, the length of the cycle of the scale is 1, 2, It can be specified as 5, 10. When the priority of each cycle is set for each cycle, the columns of the set of the cycle of the scale periodicity data and the priority of the cycle are as shown in Table 2 below. That is, the longer the scale period, the higher the priority.

[0045]

[Table 2]

FIG. 1 can also be applied to the fifth embodiment. The difference from the fourth embodiment is that the cycle length of the cycle data stored in the scale periodicity storage means 2 is 1, 2, 5, 10. When the scale drawing means 3 includes the respective P _i base counting means of P _i = 1, 2, 5, 10 and there is at least one cycle in which the count value becomes 0 at a certain position, among these cycles The scale drawing means 3 draws the scale corresponding to the one having the highest priority at that position.

FIG. 9 shows the count values n ₁ , n of the ₁ , 2, 5, and 10 decimal counting means corresponding to the scale and its position shown in FIG.
₂ , n ₅ and n ₁₀ are shown, and among the count value 0, the one in the shaded frame has the highest priority and is the scale to be drawn.

First, at step 601, one count is assigned to each cycle of the periodicity data. A binary count n _{1 for} a cycle length ₁ ; a binary count n _{2 for} a cycle length ₂ ; a quinary count n 5 for a cycle length ₅ ;
A decimal number n ₁₀ is assigned to a period length of 10. Next, at step 602, since the minimum scale drawing position Min is also a reference point, the count values of each cycle are all 0 (count value column 901 in FIG. 9).

Next, at step 603, since there is a cycle with a count value of 0, the routine proceeds to step 604, where the cycle with a count value of 0, that is, the cycle with the highest priority among all cycles, in this case, the cycle Draw a scale with a length of 10.
Next, from step 605 to step 606, if the count value of each cycle is incremented by 1, the sequence of count values of each cycle becomes as shown by 902 in FIG. Returning to step 603, since there is a cycle with a count value of 0, the process proceeds to step 604, and there is only a cycle with a count value of 0, in this case, a scale with a cycle length of 1. draw.

Next, when proceeding from step 605 to step 606, the sequence of count values for each cycle is as shown by 903 in FIG. Returning to step 603, since there is a cycle with a count value of 0, the process proceeds to step 604, and the cycle with a count value of 0, that is, the scale with the highest priority of the scales with a cycle length of 1 or 2, Draws a scale with a period length of 2. This operation is repeated up to position 904 in FIG. Thereby, the scale of FIG. 8 is drawn.

Example 6. In the above-mentioned embodiment, the P _i- adic counting means increments the count value by 1 each time the position is moved from the reference point to the basic unit section, but may be configured to decrease by 1 and the reference point Is not the position of Min, but Ma
The position on the x side may be used, and the same effect as that of the above-described embodiment can be obtained.

Example 7. In the above-described embodiment, the cycle priority P _r is determined with respect to the cycle length as shown in Table 1 and Table 2. However, in the scale periodicity storage means, the cycle priority is also shared by the cycles, May be configured such that the longer the number, the higher the priority, and the same effect as that of the above-described embodiment is obtained.

By the way, although the CRT display is used as an example of the display means 4 in FIG. 1, it goes without saying that it may be used for another display device such as a printer or a plotter.

[0054]

As described above, according to the present invention, since the scale of each cycle is drawn based on the specified graph drawing condition and the periodicity data of an arbitrary scale, various scales can be drawn. A scale based on the number system can be drawn, and by changing the periodicity data stored in the scale periodicity storage means, it is possible to prepare a single scale drawing means without preparing another scale drawing means or changing the scale drawing means. The scale drawing means can easily draw a scale having an arbitrary periodicity, and is highly flexible.

Further, by specifying the display attribute of the scale line for each cycle, the display of the scale line for each cycle can be distinguished.

Further, by designating a priority for each cycle and preferentially drawing a scale having a high priority, it is possible to draw a scale composed of a free combination of a plurality of cycles.

Further, by changing the count value of the counting means for each cycle in the scale drawing means in accordance with the movement of the position on the scale, the scales can be sequentially determined and the scale corresponding to the one having the highest priority can be set. Can be drawn in position.

Further, the priority of the cycle is shared by the cycles, and the higher the cycle, the higher the priority. Therefore, the storage capacity can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a graph drawing device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the concept of an operation of drawing a graph.

FIG. 3 is a detailed flowchart of scale drawing in step III of FIG.

FIG. 4 is an explanatory diagram of a scale example used for describing scale drawing.

FIG. 5 is an explanatory diagram of a scale example used for describing scale drawing.

FIG. 6 is a detailed flowchart of another example of the scale drawing in step III of FIG.

FIG. 7 is an explanatory diagram showing an example of a scale having a cycle length of 3 and its count value.

FIG. 8 is an explanatory diagram of a scale example used to describe scale drawing.

FIG. 9 is an explanatory diagram showing an example of a scale having a plurality of cycles and a count value of each cycle.

[Explanation of symbols]

 1 Graph Drawing Condition Designating Means 2 Scale Periodicity Storage Means 3 Scale Drawing Means 4 Data Input Means 5 Data Drawing Means 6 Display Means

Claims (8)

[Claims] 1. A graph drawing condition designating unit for specifying a graph drawing condition, a scale periodicity storing unit for storing periodicity data of an arbitrary scale, and a scale based on the graph drawing condition and the periodicity data. Scale drawing means for drawing, data input means for inputting a numerical data string to be drawn as a graph, data drawing means for drawing the numerical data string, and display means for displaying the drawn scale and the data A graph drawing device comprising: a scale periodicity storage means for storing at least one cycle length of an arbitrary scale. 2. The graph drawing apparatus according to claim 1, wherein the scale periodicity storage means specifies a display attribute of a scale line for each cycle. 3. The graph drawing apparatus according to claim 1, wherein the scale periodicity storage means specifies a priority for each cycle, and the scale drawing means draws a scale having a high priority. 4. The scale drawing means when the lengths of all the cycles stored in the scale periodicity storage means are expressed as an integral multiple of a certain unit length and all the cycles start from a common reference point. Is provided with P _i base counting means for each cycle P _i , the count value of the counting means becomes 0 at the reference point, and the count value is incremented by 1 each time the position is moved from the reference point by the unit length or 4. When there is at least one cycle in which the count value decreases and the count value becomes 0 at a certain position, a scale corresponding to the cycle with the highest priority in this cycle is drawn at this position. The described graph drawing device. 5. The graph drawing apparatus according to claim 3, wherein in the scale periodicity storage means, the priority of the cycle is shared by the cycles, and the higher the cycle, the higher the priority. 6. A graph drawing method for drawing a scale and displaying data, wherein the scale is based on a specified graph drawing condition and periodic data of an arbitrary scale stored in the graph drawing condition or preset. A graph drawing method characterized by drawing. 7. The graph drawing method according to claim 6, wherein when there are a plurality of types of periodicity data, a priority is designated for the cycle and a scale with a high priority is drawn. 8. The graph drawing method according to claim 7, wherein the priority of the cycle is shared by the cycles, and the longer the cycle, the higher the priority.