JPH04237363A - Electronic desk calculator with coordinate function - Google Patents

Abstract

PURPOSE:To remove the misdisplay of a coordinate format by providing this electronic desk calculator with a coordinate format display means for indicating which coordinate format i.e., a rectangular coordinate format or a polar coordinate format, is used for displaying coordinates. CONSTITUTION:In addition to a state so as not to determine coordinate formats stored in memories (a), (b), a rectangular coordinate calculating mode and a polar coordinate calculating mode each of which uniformly processes coordinates as the rectangular coordinate format or the polar coordinate format are prepared. These coordinate calculating modes are simultaneously set up at the time of depressing a coordinate transformation key, [ xy] key 24b or [ rtheta] key 24a, to execute coordinate transformation. When either one of the coordinate calculation modes is set up, the coordinate calculation mode is displayed on a guidance display part 12 of an LCD display panel 1. Namely a symbol [xy] or a symbol [rtheta] is displayed in the rectangular coordinate calculation mode or the polar coordinate calculation mode.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calculator with a coordinate function capable of performing coordinate conversion between rectangular coordinate format and polar coordinate format and calculation of complex numbers.

0002

2. Description of the Related Art An example of a calculator that can perform coordinate transformation and calculation of complex numbers is shown in FIG. This calculator is provided with an LCD display panel 1 at the upper part of the main body surface, and a key operation panel 2 from the center to the lower part.

The LCD display panel 1 is a liquid crystal display device having a numerical value display section 11, a guidance display section 12, and an angle unit display section 13. The numerical value display section 11 is provided with a 10-digit segment display section in which a decimal point is added to a 7-segment display in the shape of a "day" character, thereby making it possible to display numerical values up to 10 digits. Guidance display section 12
is provided at the left end of the numerical display section 11, and is capable of providing various guidance to the operator using a special segment display section. The angular unit display section 13 is for notifying the operator of the current angular unit by switching and displaying letter-shaped segments, and displays each angular unit of degree, radian, and grad as "DEG". ”, “RAD” and “GRAD”.

The key operation panel 2 is provided with a number key 21, an arithmetic calculation key 22, a function key 23, a function key 24, and the like. The numeric keys 21 include keys [0] to [9] and [. ] This is a key for inputting numerical values using the key 21a or the like. The four arithmetic calculation keys 22 are used for addition (
These are keys for performing four arithmetic calculations such as +) and multiplication (x), and a [+] key 22a and the like are provided. Further, an [=] key 22b is provided in association with the four arithmetic calculation keys 22, and by operating this key, the input calculation is executed and the result is displayed on the LCD display panel 1. Function key 23
is a key for calculating trigonometric functions, powers, etc. The function keys 24 are keys for executing various other functions, such as an [a] key 24a for inputting or displaying the x-axis of orthogonal coordinates, the real part of a complex number, or the absolute value r of polar coordinates; A [b] key 24b and the like are provided for inputting or displaying the y-axis of orthogonal coordinates, the imaginary part of complex numbers, or the argument θ of polar coordinates. The function keys 24 also include [[]] for assigning a second function to each key.
2ndF] key 24c is provided. After operating this [2ndF] key 24c, for example, [a
] key 24a serves as the [→rθ] key 24a for converting coordinates into polar coordinate format, and [b] key 2
4b serves as the [→xy] key 24b for converting coordinates into a rectangular coordinate format. Also,[. ] key 2
1a is a key for converting angle units as the [DRG→] key 21a.

An example of the operation of coordinate transformation using the above-mentioned calculator with a coordinate function will be explained based on Table 1 below.

[0006]

[Table 1]

First, in step 1, operate the numeric key 21, [a] key 24a, and [b] key 24b to set the coordinates (3, 4
). Here, when the [a] key 24a is operated, the numerical value "3" is input into the a memory indicating the x-axis of the orthogonal coordinates, the real part of the complex number, or the absolute value r of the polar coordinates, and the [b] key 24b is operated. Then, the value "4" will be input into the b memory indicating the y-axis of Cartesian coordinates, the imaginary part of complex numbers, or the argument θ of polar coordinates, and thereby the coordinates (3, 4) will be input. . However, in conventional calculators with a coordinate function, it is not determined whether the coordinate format of these coordinates is handled as a rectangular coordinate format or as a polar coordinate format. In addition,[
When the [a] key 24a and the [b] key 24b are operated,
"a" or "b" is displayed on the guidance display section 12, respectively.

When the coordinates are input in this way and the [→rθ] key 24a is operated in step 2, the input coordinates are converted into polar coordinate format, and the absolute value r of the polar coordinates as a result of the conversion is shown on the numerical display section 11. The value of a memory is displayed, and
"a" indicating this is displayed on the guidance display section 12. In addition, when the [b] key 24b is subsequently operated in step 3, the argument θ of the polar coordinates resulting from the conversion is displayed on the numerical display section 11.
While the memory value is displayed, the guidance display section 12
“b” is displayed to indicate this. That is, in this case,
Only when the [→rθ] key 24a is operated, the input coordinates are handled as a rectangular coordinate format, and then the input coordinates are converted into a polar coordinate format. And step 4
When the [→xy] key 24b is operated, the polar coordinates are converted into a rectangular coordinate format, and the value of the a memory indicating the x-axis of the rectangular coordinate or the real part of a complex number as a result of the conversion is displayed on the numerical display section 11. Further, when the [b] key 24b is operated in step 5, the y of the orthogonal coordinates of the conversion result is displayed on the numerical display section 11.
The value of the b memory indicating the imaginary part of the axis or complex number is displayed.

Next, an example of how to calculate coordinates using the above-mentioned calculator with a coordinate function will be explained based on Table 2 below.

0010

[Table 2]

First, in step 11, coordinates (2, 3) are input, and then in step 12, the [+] key 22a is operated. In this case, the calculator can perform coordinate calculations only in the orthogonal coordinate format, and since the addition is the sum of the numerical values of each axis of the orthogonal coordinates, the input coordinates are also treated as the orthogonal coordinate format. Then, in step 13, polar coordinates (2, 45) are input. However, as it is, the calculator handles these coordinates as a rectangular coordinate format and performs coordinate calculations, so in step 14, the [→xy] key 24b is operated to convert the input polar coordinates into a rectangular coordinate format. And step 1
When the [=] key 22b is operated in Step 5, coordinate calculation is performed using the two input coordinates in Cartesian coordinate format, and the value of the calculation result in the a memory is displayed on the numerical display section 11.

After the coordinate calculation has been performed as described above, when the [→rθ] key 24a is operated in step 16, the orthogonal coordinates of this calculation result are converted into polar coordinate format, and the absolute value is displayed on the numerical display section 11. The value of the a memory indicating the value r is displayed. Further, when the [b] key 24b is subsequently operated in step 17, the value of the b memory indicating the declination angle θ is displayed.

[0013]

[Problem to be Solved by the Invention] In conventional calculators with a coordinate function, the coordinate format of the coordinates stored in the a memory and the b memory is not determined, as is clear from the operation example shown in Table 1 above. However, even if it is determined which coordinate format to use by performing coordinate transformation,
This coordinate format cannot be determined only from the display on the D display panel 1. Therefore, for example, after converting the coordinates to polar coordinate format in step 2 of Table 1, the operator forgets this and operates the [→rθ] key 24a again to convert the coordinates to polar coordinate format, resulting in meaningless numerical values. It was easy to misunderstand the polar coordinates as a rectangular coordinate format and calculate the coordinates as is, resulting in an error in the calculation.

Furthermore, as is clear from the operation example shown in Table 2 above, when performing coordinate calculations between polar coordinates or mixed calculations between orthogonal coordinates and polar coordinates, it is necessary to first convert all polar coordinates into orthogonal coordinate format. is required, and if you try to obtain the calculation result in polar coordinate format, after the calculation, [→rθ
] key 24a must be operated to convert the coordinates into polar coordinate format, which makes the operation complicated.

Furthermore, in conventional calculators with a coordinate function, coordinates are not determined in polar coordinate format, so [DRG→
] The angle unit conversion by the key 21a is always a conversion to a set number. That is, as shown in Table 3 below, for example, input the coordinates (3, 4) in step 21 using angle as a degree unit, and then operate the [→rθ] key 24a in step 22 to convert these coordinates into polar coordinates. Even after coordinate conversion to the format, if you operate the [DRG→] key 21a in step 23,
This angular unit conversion is performed on the number "5" displayed on the numerical display section 11 at that time, and a meaningless conversion is performed on the value in the a memory indicating the absolute value r in polar coordinate format. I will do it. Therefore, when dealing with coordinates in polar coordinate format and trying to convert the angular unit of the argument angle θ of these coordinates, first display the value in the b memory, convert it to the angular unit, and then: convert the conversion result again b
An operation for inputting information into memory is required, and the operation is also complicated in this case.

[0016]

[Table 3]

As a result, the conventional calculator with coordinate function has a
Since the coordinate formats of the coordinates stored in the memory and b memory are not clear, the operator must always manage which coordinate format the coordinates are in, and when performing coordinate calculations or polar coordinates. There is a problem in that the operation becomes complicated when converting the angular unit of the declination angle. In view of the above circumstances, the present invention provides a calculator with a coordinate function that allows an operator to easily recognize the current coordinate format, and a calculator with a coordinate function that can automatically execute coordinate calculations in any coordinate format. In addition, the purpose is to provide a calculator with a coordinate function that can always perform this conversion on the declination when converting angle units to coordinates in polar coordinate format. There is.

[0018]

[Means for Solving the Problems] A calculator with a coordinate function of the present invention is a calculator with a coordinate function, which is equipped with a coordinate format conversion means for converting a coordinate format between a rectangular coordinate format and a polar coordinate format. The apparatus further includes coordinate format display means for indicating whether the coordinate format is displayed in a rectangular coordinate format or a polar coordinate format, thereby achieving the above object.

Another calculator with a coordinate function according to the present invention has at least one of a rectangular coordinate calculation mode and a polar coordinate calculation mode, and includes coordinate format conversion means for converting the coordinate format between the rectangular coordinate format and the polar coordinate format. A calculator with a coordinate function, which includes a coordinate format identification means for identifying whether coordinates are displayed in a rectangular coordinate format or a polar coordinate format, and a coordinate calculation mode for setting one of the rectangular coordinate calculation mode and the polar coordinate calculation mode. The coordinate format conversion means includes a setting means, and when the coordinates to be calculated are displayed in a coordinate format that is not compatible with the set coordinate calculation mode,
This converts the coordinate format of the calculation target into a coordinate format that is compatible with the set coordinate calculation mode.

Still another calculator with a coordinate function of the present invention is provided with a display means and an angular unit conversion means for converting the number displayed on the display means into an angular unit, and in a polar coordinate calculation mode. A calculator with a coordinate function capable of performing complex number calculations, further comprising identification means for indicating that the number displayed on the display means is at least a part of a complex number, and the angular unit conversion means is capable of performing polar coordinate calculations. In the mode, if the identification means indicates that the number is at least a part of a complex number, the argument of the complex number is converted into angular units.

[0021]

[Operation] As mentioned above, with a normal calculator with coordinate function,
It is not possible to distinguish whether coordinates consisting of two numbers are in rectangular coordinate format or polar coordinate format. In the calculator with a coordinate function of the present invention, the coordinate format display means indicates whether coordinates are displayed in a rectangular coordinate format or a polar coordinate format. The display of whether it is an orthogonal coordinate format or a polar coordinate format can be done by displaying characters, figures, etc. indicating the orthogonal coordinate format or polar coordinate format. As a result, according to the calculator with a coordinate function of the present invention, the operator can reliably distinguish whether the coordinates resulting from coordinate transformation are in Cartesian coordinate format or polar coordinate format by looking at the display. You will be able to do this.

The coordinate format can also be displayed depending on whether the orthogonal coordinate calculation mode or the polar coordinate calculation mode is set. Here, the mode set by processing such as coordinate transformation may be canceled, for example, when new coordinates are input, but it is necessary to treat these new input coordinates as the coordinate format of the mode. You can also do it. Further, in this case, the mode setting may be explicitly performed by operating any of the keys. In this way, if you can not only display the coordinate format of the processing result by setting the mode, but also specify the coordinate format for newly input coordinates in advance, it will be possible to clearly specify whether the coordinates are in Cartesian coordinate format or polar coordinate format. It can be done. Further, for example, by setting the default value mode to the orthogonal coordinate format and always setting one of the modes when handling coordinates, the coordinate format of all coordinates can be determined.

Note that the coordinates referred to herein are not limited to simply indicating points on orthogonal coordinates or polar coordinates, but also include complex numbers expressed in orthogonal coordinate format or polar coordinate format, respectively. When these coordinates are complex numbers, not only addition and subtraction, but also multiplication and division coordinate calculations are possible for the two coordinates.

In another calculator with a coordinate function of the present invention, when the coordinate display format is not a predetermined format, the coordinates are converted into a predetermined coordinate format. If the predetermined coordinate format may be either of the two coordinate formats, coordinate transformation is performed for one of the coordinates only when the formats of the coordinates to be calculated are different. However, if the format of the coordinates to be calculated is set to one of the two formats, even if the two coordinate formats match, it may be necessary to transform both coordinates into the predetermined coordinate format. Note that if the format of the coordinates to be calculated is not determined, a predetermined coordinate format may be used.

[0025] When the coordinate formats of the two coordinates are aligned in a predetermined format as described above, specified coordinate calculations are performed for these coordinates. If the calculation result is in a coordinate format different from the coordinate calculation mode at that time, the coordinates of this calculation result are converted into the coordinate format of the coordinate calculation mode.

As a result, according to this calculator with a coordinate function, even when the coordinate format of the coordinates to be calculated is different from the predetermined coordinate format for calculation, or when coordinate formats are mixed,
You can automatically align the coordinate format and perform coordinate calculations.
Moreover, the coordinate format of the calculation result can be matched to the coordinate calculation mode at that time.

In still another calculator with a coordinate function of the present invention,
In the polar coordinate calculation mode, the angular unit conversion means converts the argument in polar coordinate format into angular units. As a result, in the polar coordinate calculation mode, even if the absolute value of coordinates in polar coordinate format is displayed, the argument of these coordinates can always be converted into angular units.

[0028]

EXAMPLES The present invention will be explained below with reference to examples.

FIGS. 1 to 4 show an embodiment of the present invention, in which FIG. 1 is a flowchart showing the operation of a calculator with a coordinate function when the coordinate conversion key is operated, and FIG. FIG. 3 is a flowchart showing the operation of the calculator with coordinate function during execution. FIG. 3 is a flow chart showing the operation of the calculator with coordinate function when the angle unit conversion key is operated. FIG. 4 is a block diagram showing the configuration of the calculator with coordinate function. be.

The calculator with the coordinate function of this embodiment uses the [a] key and the [b] key provided as function keys to calculate the coordinates of the x-axis and y-axis of orthogonal coordinates or complex numbers, as in the conventional example described above. Real part and imaginary part or absolute value r and argument angle θ of polar coordinates
It is designed to input and display information. Therefore, the external appearance of the calculator is the same as that of the conventional example shown in FIG. 5, and each key etc. is given the same reference numeral, and the explanation thereof will be omitted.

The calculator with the coordinate function is constituted by a computer device equipped with a CPU 3, as shown in FIG. The CPU 3 is provided with a ROM 4 and a RAM 5. The ROM 4 stores programs, fixed data, and the like. The RAM 5 is used as a work area for this program. Also, CPU
3 includes an LCD along with the key operation panel 2 shown in FIG.
The LCD display panel 1 shown in FIG. 5 is connected via the driver 6, and the CPU 3 reads the key operations on the key operation panel 2 according to the program, and displays numerical values, guidance displays, angle unit displays, etc. on the LCD display panel 1 as appropriate. It is designed to do this.

[0032] As with the conventional calculator, the [→xy] key 24b or the [→rθ] key 2 shown in FIG.
By operating the coordinate conversion key 4a, the coordinate formats of the coordinates stored in the a memory and the b memory can be converted. For example, let each value of two orthogonal axes in orthogonal coordinates be (x, y), and the absolute value and argument in polar coordinates be (
r, θ), the coordinate transformation from rectangular coordinates to polar coordinates is

[0033]

[Math 1]

The coordinate transformation from polar coordinates to rectangular coordinates is calculated by

[0035]

[Math 2]

It is calculated by:

The above-mentioned calculator with coordinate function has a
In addition to a state in which the coordinate format of the coordinates stored in the memory and the b memory is not determined, there are provided an orthogonal coordinate calculation mode and a polar coordinate calculation mode in which the coordinates are uniformly handled in an orthogonal coordinate format or a polar coordinate format. This coordinate calculation mode is [→
xy] key 24b or [→rθ] key 24a to perform coordinate transformation. Therefore, this coordinate calculation mode not only determines the coordinate format of newly input coordinates, but also determines the coordinate format of newly input coordinates. Since the coordinate format of the new coordinates is also converted to match the new coordinate calculation mode, all coordinates are treated as unified in the coordinate format. Further, when any of these coordinate calculation modes is set, that coordinate calculation mode is displayed on the guidance display section 12 on the LCD display panel 1. That is, in the orthogonal coordinate calculation mode, an "xy" symbol is displayed, and in the polar coordinate calculation mode, an "rθ" symbol is displayed.

Note that if the coordinate formats of the coordinates stored in the a and b memories are also stored, it is no longer necessary to execute the coordinate conversion at the same time as the coordinate calculation mode conversion. . However, in this case, it is necessary to check the coordinate format of each coordinate serving as an operand during coordinate calculation and perform coordinate transformation so that the coordinate format becomes a predetermined coordinate format. Further, this coordinate calculation mode may be set only when the coordinate format of the transformation result is determined by performing coordinate transformation. However, in this case, the operator may have to manage the coordinate format of the coordinates to be calculated when calculating the coordinates.

[0039] The above-mentioned calculator with a coordinate function performs addition and subtraction of coordinates by adding and subtracting values of each axis in a rectangular coordinate format. That is, for example, if the coordinates in the orthogonal coordinate format are (x1, y1) and (x2, y2),

[0040]

[Math 3]

The coordinates (x, y
). Therefore, when coordinates determined as polar coordinates are to be calculated, the coordinates are automatically converted to rectangular coordinates before coordinate calculation is performed. Furthermore, if the coordinate calculation mode at the time of coordinate calculation is polar coordinate calculation mode, the calculation result is automatically converted into a polar coordinate format and displayed. Calculations can be made in the same way when the coordinates are complex numbers. However, when multiplying and dividing complex numbers, it may be more convenient to perform calculations in polar coordinate format. That is, if the coordinates in polar coordinate format are (r1, θ1) and (r2, θ2),

[0042]

[Math 4]

The coordinates (r, θ
) can be easily calculated.

[0044] As with the conventional calculator, the angular unit of the number displayed on the numerical display section 11 can be converted by operating the [DRG→] key 21a shown in FIG. . However, when the coordinate calculation mode is the polar coordinate calculation mode, regardless of what is displayed on the numerical display section 11 at that time, the argument of the polar coordinates is converted into units of angle.

The operation when the coordinate conversion key is operated in the calculator with the coordinate function configured as described above will be explained based on the flowchart shown in FIG.

[→rθ] key 24a on the key operation panel 2
Or when the [→xy] key 24b is operated, first in step S1, this coordinate conversion key is changed to the [→xy] key 2.
4b is determined. And [→xy]
If the key 24b is pressed, it is determined whether or not the mode is the orthogonal coordinate calculation mode (step S2). If the mode is the orthogonal coordinate calculation mode, there is no need to perform coordinate transformation.
Processing ends immediately. However, if the coordinate calculation mode is not set or the polar coordinate calculation mode is set, the coordinates stored in the a memory and b memory are converted into orthogonal coordinate format (step S3), and the coordinate calculation mode is changed to orthogonal coordinate calculation mode. After setting the mode (step S4), the process ends.

[→r
θ] key 24a, it is determined whether the mode is the polar coordinate calculation mode (step S5). If the mode is the polar coordinate calculation mode, there is no need to perform coordinate transformation, so the process continues. finish. However, if the coordinate calculation mode is not set or the orthogonal coordinate calculation mode is set, the coordinates stored in the a memory and the b memory are converted into polar coordinate format (step S6), and the coordinate calculation mode is changed to the polar coordinate calculation mode. After setting (step S7), the process ends.

Note that if the coordinates are not stored before the coordinate conversion key is operated, step S4 or S
7, the process is completed by simply switching the coordinate calculation mode.

An example of the operation of the coordinate conversion keys will be explained based on Table 4 below.

[0050]

[Table 4]

First, in a state where the coordinate format has not been determined, in step 31, the numeric key 21, the [a] key 24a and the [a] key 24a are pressed.
b] Operate the key 24b to input the coordinates (3, 4). Next, in step 32, when the [→rθ] key 24a is operated, the input coordinates are treated as a rectangular coordinate format, which is converted into a polar coordinate format, and the coordinate calculation mode is set to the polar coordinate calculation mode. For this reason, the numerical display section 1
1 displays the value of the a memory which is the absolute value r of the coordinates of the conversion result, and the guidance display section 12 displays this absolute value r.
"a" indicating polar coordinate calculation mode is displayed along with "a" indicating polar coordinate calculation mode.
rθ” is displayed. Also, in step 33, [b
] When the key 24b is operated, the value of the b memory, which is the argument angle θ of the coordinates of the conversion result, is displayed on the numerical display section 11, and the display of "a" on the guidance display section 12 is switched to "b".

[0052] Then, in step 34, press the [→xy] key 24b.
When operated, the polar coordinates are returned to the orthogonal coordinate format and the orthogonal coordinate calculation mode is set. Therefore, the numerical display section 11 displays the value of the a memory, which is the x coordinate of the orthogonal coordinates, and the guidance display section 12 displays the value of the a memory, which is the x coordinate of the Cartesian coordinate.
Along with the display of "a" indicating the coordinates, "xy" indicating the orthogonal coordinate calculation mode is displayed. Also, continue with step 35
When the [b] key 24b is operated, the value of the b memory, which is the y-coordinate of the orthogonal coordinates, is displayed on the numerical display section 11, and the display on the guidance display section 12 is switched to "b".

[0053] As a result, the operator can
By looking at the display of "xy" or "rθ" in step 2, it is possible to clearly distinguish whether what is displayed on the numerical display section 11 is a value in orthogonal coordinates or a value in polar coordinates, eliminating the risk of making a mistake in operation. .

Next, the operation of calculating coordinates using the calculator with the coordinate function will be explained based on the flowchart shown in FIG.

When the [=] key 22b shown in FIG. 5 or the like is operated to instruct coordinate calculation, it is first determined whether the coordinate calculation mode is the polar coordinate calculation mode (step S
11). And if it is in polar coordinate calculation mode,
After converting the two polar coordinates to be calculated into a rectangular coordinate format (step S12), coordinate calculation is executed (step S13). Therefore, the coordinate calculation in this embodiment is always performed in the orthogonal coordinate format regardless of the coordinate calculation mode. Note that when individual coordinates are stored together with their coordinate formats, the respective coordinate formats may be different. Therefore, in this case, the coordinate format is checked for each coordinate, and if it is a polar coordinate format, a process is performed to convert the coordinate format into a rectangular coordinate format.

If it is determined in the process of step S11 that the mode is not polar coordinate calculation mode, the process immediately proceeds to step S13.
Then, the two coordinates to be calculated are directly calculated. Therefore, even when the coordinate calculation mode is not set, the coordinate calculation is performed by interpreting the coordinates in Cartesian coordinate format as in the conventional case.

When the coordinate calculation is executed as described above, it is again determined whether the mode is polar coordinate calculation mode (step S14), and if it is the polar coordinate calculation mode, the coordinates of the calculation result are converted into polar coordinate format. After the coordinate transformation (step S15), the coordinates of this transformation result are displayed on the LCD display panel 1.
(Step S16). If the mode is not the polar coordinate calculation mode, the process immediately moves to step S16, and the calculation result in the orthogonal coordinate format is displayed as is.

An example of the operation of the above coordinate calculation will be explained based on Table 5 below.

[0059]

[Table 5]

First, when the orthogonal coordinate calculation mode is set, input the orthogonal coordinates (2, 3) in step 41, and then operate the [→rθ] key 24a in step 42. The coordinates are converted to polar coordinate format and the polar coordinate calculation mode is set. Then, in step 43, the [+] key 22a is operated, and in step 44, the polar coordinates (2, 4
5) and further operate the [=] key 22b in step 45, these polar coordinates are converted to rectangular coordinate format and added, and the calculation result is converted to polar coordinate format and displayed on the numerical display section 11. The value of the a memory, which is its absolute value r, is displayed. Also, in step 46, the [b] key 24b
When you operate , the value in the b memory, which is the argument angle θ of the polar coordinates of the calculation result, is displayed on the numerical display section 11.

As a result, even if the operator inputs a mixture of orthogonal coordinates and polar coordinates, the operator can directly calculate the coordinates without performing coordinate conversion operations, as in the case where only orthogonal coordinates are input. become able to. Also, at this time, the coordinate format of the displayed coordinates can be confirmed by displaying "xy" or "rθ" on the guidance display section 12, so that confusion does not occur.

Further, the operation when the angular unit conversion key is operated in the calculator with the coordinate function will be explained based on the flowchart of FIG.

When the [DRG→] key 21a shown in FIG. 5 is operated to instruct conversion in angular units, it is first determined whether the mode is polar coordinate calculation mode (step S21).
. If it is not the polar coordinate calculation mode, the angular unit is converted for the number displayed on the numerical value display section 11 as in the past (step S22), and the angular unit display section 13
In addition to displaying the angular unit converted to (step S2
3) Display the conversion result on the numerical display section 11 (step S23). To convert this angle unit, press [DRG →] key 2.
Each time 1a is operated, the angle units of degrees, radians, and grads are changed in turn.

If it is determined that the mode is polar coordinate calculation mode in the process of step S21, the argument θ of the polar coordinates stored in the b memory is converted in units of angle (step S25), and the conversion result is After inputting into the b memory (step S26), the above step S2
Shift to processing from step 2.

An example of the above angle unit conversion operation will be explained based on Table 6 below.

[0066]

[Table 6]

First, if the angular unit is degree and the polar coordinate calculation mode is set, in step 51 polar coordinates (3, 30) are input. Then, in step 52, [DRG
→] When the key 21a is operated, the argument θ of this polar coordinate is converted into angular units, and the numerical display section 11 displays the conversion result in radian units, and the angular unit display section 13 displays "DEG". to "RAD".

[0068] Also, here, according to step 53, [a] key 2 is pressed.
4a to display the absolute value r of the input polar coordinates, and then operate the [DRG→] key 21a again in step 54, the displayed digit "3" will not be displayed. The angle unit conversion is performed again for the polar coordinate argument θ, and the conversion result in grad units is displayed on the numerical display section 11, and the display on the angular unit display section 13 is changed to "GRAD".
”. Then, in step 55, [DRG→
] When the key 21a is operated, the angle unit conversion is performed again, and the conversion result in the same degree unit as entered is displayed on the numerical display section 11, and the display on the angle unit display section 13 also changes to "
Return to DEG.

As a result, in the polar coordinate calculation mode, conversion in angular units is always performed for the polar angle θ of the polar coordinates, so that conversion operations in angular units can be performed easily.

[0070]

[Effects of the Invention] As is clear from the above explanation, according to the calculator with the coordinate function of the present invention, the coordinate format of the coordinates determined by the coordinate calculation mode can be reliably distinguished by the display on the display unit. , there will be no confusion between the orthogonal coordinate format and the polar coordinate format. Further, according to another calculator with a coordinate function of the present invention, even when the coordinate format determined by this coordinate calculation mode is different from the predetermined coordinate format for calculation or when coordinate formats are mixed, Since coordinate calculations can be performed directly, the effort required for key operations to instruct coordinate transformation can be reduced. Furthermore, according to yet another calculator with a coordinate function of the present invention, in the polar coordinate calculation mode, it becomes possible to easily convert the angle unit of the argument in polar coordinate format.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a flowchart showing the operation of a calculator with a coordinate function when a coordinate conversion key is operated.

FIG. 2 is a flowchart showing the operation of the calculator with coordinate function shown in FIG. 1 when performing coordinate calculation.

FIG. 3 is a flowchart showing the operation when the angle unit conversion key in the calculator with coordinate function shown in FIG. 1 is operated.

FIG. 4 is a block diagram showing the configuration of the calculator with coordinate function shown in FIG. 1;

FIG. 5 is a plan view of a calculator with a coordinate function.

[Explanation of symbols]

12 Guidance display section 13 Angle unit display section 21a [DRG→] key 22 Four arithmetic calculation keys

Claims (3)

[Claims] Claim 1: A calculator with a coordinate function, which is equipped with a coordinate format conversion means for converting a coordinate format between a rectangular coordinate format and a polar coordinate format, wherein the coordinates are displayed in either the rectangular coordinate format or the polar coordinate format. A calculator with a coordinate function, further comprising a coordinate format display means for indicating whether or not the user is present. 2. A calculator with a coordinate function, which has at least one of a rectangular coordinate calculation mode and a polar coordinate calculation mode, and is equipped with a coordinate format conversion means for converting a coordinate format between a rectangular coordinate format and a polar coordinate format. , a coordinate format identification means for identifying whether the coordinates are displayed in an orthogonal coordinate format or a polar coordinate format, and a coordinate calculation mode setting means for setting one of the orthogonal coordinate calculation mode and the polar coordinate calculation mode, and the coordinate format conversion If the coordinates of the calculation target are displayed in a coordinate format that is not compatible with the set coordinate calculation mode, the means changes the format of the coordinates of the calculation target to a coordinate format compatible with the set coordinate calculation mode. Calculator with coordinate function to convert to. 3. A display device comprising: a display means; and an angular unit conversion means for converting the number displayed on the display means into angular units; and a coordinate function capable of performing complex number calculations in polar coordinate calculation mode. The calculator further includes identification means for indicating that the number displayed on the display means is at least a part of a complex number, and the angular unit conversion means is configured such that, in the polar coordinate calculation mode, the identification means indicates that the number displayed on the display means is at least a part of a complex number. A calculator with a coordinate function that converts the argument of a complex number into angular units when the number indicates that the number is at least a part of a complex number.