JP2738595B2 - Calculator with coordinate function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calculator having a coordinate function capable of performing coordinate conversion between a rectangular coordinate system and a polar coordinate system and calculating a complex number.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a calculator capable of performing coordinate conversion and calculation of complex numbers. This calculator is provided with an LCD display panel 1 at the top of the main body surface, and a key operation panel 2 from the center to the bottom.

The LCD display panel 1 has a numerical display 11
And a guidance display unit 12 and an angle unit display unit 13. Numerical value display section 11 indicates “day”
A segment display unit is provided for ten digits, in which a decimal point display is added to a character-shaped seven-segment display, whereby a numerical value of up to ten digits can be displayed. Guidance display section 1
Numeral 2 is provided at the left end of the numerical value display section 11, and various kinds of guidance can be provided to the operator by a special segment display section. The angle unit display unit 13 is for notifying the operator of the current angle unit by switching and displaying the character-shaped segments, and each of the angle units of degrees (degrees), radians, and grads is represented by “DEG”. , "RAD" and "GRAD".

[0004] The key operation panel 2 is provided with a numeric key 21, an arithmetic key 22, a function key 23, a function key 24 and the like. The numeric key 21 indicates each key of [0] to [9] and [. ] Key for inputting a numerical value by the key 21a or the like. The four arithmetic calculation keys 22 are keys for performing four arithmetic calculations such as addition (+) and multiplication (x), and are provided with a [+] key 22a and the like. A [=] key 22b is provided in association with the four arithmetic calculation keys 22,
By operating this key, the input calculation is executed and the result is displayed on the LCD display panel 1. Function key 2
Reference numeral 3 denotes a key for calculating a trigonometric function, a power, and the like. The function key 24 is a key for executing other various functions. For example, an [a] key 24a for inputting or displaying an x-axis of a rectangular coordinate or a real part of a complex number or an absolute value r of a polar coordinate, A [b] key 24b is 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 key 24 is provided with a [2ndF] key 24c for assigning a second function to each key. After the [2ndF] key 24c is operated, for example, the [a] key 24a becomes a key for performing coordinate conversion to the polar coordinate format as the [→ rθ] key 24a, and the [b] key 24b
Is a key for performing coordinate conversion to the rectangular coordinate format as the [→ xy] key 24b. Also,[. ] Key 21a
Is a key for performing an angle unit conversion as the [DRG →] key 21a.

An operation example of coordinate conversion using the above-described calculator with a coordinate function will be described with reference to Table 1 below.

[0006]

[Table 1]

First, in step 1, the numeric key 21, the [a] key 24a, and the [b] key 24b are operated to set the coordinates (3, 3).
4) Enter. Here, when the [a] key 24a is operated, the numerical value “3” is input to 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 [b]
When the key 24b is operated, the numerical value “4” is stored in the b memory indicating the y-axis of the orthogonal coordinates, the imaginary part of the complex number, or the argument θ of the polar coordinates.
Is input, and the coordinates (3, 4)
Is input. However, in the conventional calculator with a coordinate function, it is not determined whether to treat the coordinate format of the coordinates as a rectangular coordinate format or a polar coordinate format. In addition,
When the [a] key 24a and the [b] key 24b are operated, the guidance display section 12 displays “a” or “b”, respectively.
Is displayed.

When the coordinates are input in this manner and the [→ rθ] key 24a is operated in step 2, the input coordinates are converted into polar coordinates and the numerical value display section 11 shows the absolute value r of the converted polar coordinates. a The value of the memory is displayed and
“A” indicating this is displayed on the guidance display section 12. When the [b] key 24b is subsequently operated in the procedure 3, the numerical display unit 11 displays the value of the b memory indicating the declination angle θ of the polar coordinate as the conversion result, and displays the guidance display unit 1
In FIG. 2, "b" indicating this is displayed. That is, in this case, the input coordinates are first handled in the rectangular coordinate format by operating the [→ rθ] key 24a, and the input coordinates are converted to the polar coordinate format. Then, when the [→ xy] key 24b is operated in step 4, the polar coordinates are converted into the rectangular coordinate format, and the value of the a memory indicating the x-axis of the rectangular coordinates or the real part of the complex number is displayed on the numerical value display unit 11. Is displayed. Then, in step 5, the [b] key 24
When b is operated, the numerical value display unit 11 displays the value of the b memory indicating the y-axis of the orthogonal coordinates or the imaginary part of the complex number as the conversion result.

Next, an operation example of coordinate calculation using the above calculator with a coordinate function will be described with reference to Table 2 below.

[0010]

[Table 2]

First, in step 11, the coordinates (2, 3) are input, and then in step 12, the [+] key 22a is operated.
In this case, the calculator can perform the coordinate calculation only in the rectangular coordinate format, and since the addition is the sum of the numerical values of the respective axes of the rectangular coordinate, the input coordinates are also handled in the rectangular coordinate format. Then, in step 13, polar coordinates (2, 45) are input. However, as it is, the calculator treats the coordinates as a rectangular coordinate format and performs the coordinate calculation. Therefore, in step 14, the [→ xy] key 24b is operated to convert the input polar coordinates into the rectangular coordinate format. And procedure 1
When the [=] key 22b is operated in step 5, the coordinate calculation is performed using the two input coordinates in the orthogonal coordinate format, and the numerical result display unit 11 displays the result of the calculation in the memory a.

When the [→ rθ] key 24a is operated in step 16 after the coordinate calculation has been performed as described above, the rectangular coordinates of the calculation result are converted into polar coordinates, and the absolute value is displayed on the numerical value display section 11. The value of the memory a indicating the value r is displayed. When the [b] key 24b is subsequently operated in step 17, the value of the b memory indicating the argument θ is displayed.

[0013]

In the conventional calculator with a coordinate function, since the coordinate format of the coordinates stored in the a memory and the b memory is not determined, it is apparent from the operation example shown in Table 1 above. Even if it is decided which coordinate format to handle by performing coordinate conversion, LC
This coordinate format cannot be determined only by the display on the D display panel 1. Therefore, for example, after performing the coordinate conversion to the polar coordinate format in the procedure 2 of Table 1, the operator forgets this and operates the [→ rθ] key 24a again to perform the coordinate conversion to the polar coordinate format to perform the meaningless numerical value. Or the polar coordinates are misunderstood as a rectangular coordinate format, and the coordinates are calculated as it is, and the calculation may be erroneously performed.

As is clear from the operation example shown in Table 2, when performing the coordinate calculation between polar coordinates or the mixed calculation of the rectangular coordinates and the polar coordinates, the operation of once transforming all the polar coordinates into the rectangular coordinate format is performed. Is required, and if the calculation result is to be obtained in the polar coordinate format, after calculation, [→ r
θ] key 24a to operate the coordinate conversion to the polar coordinate format, which complicates the operation.

Further, in the conventional calculator with a coordinate function, since the coordinates are not determined in the polar coordinate format, [DRG
→] The conversion in the angle unit by the key 21a is always a conversion to the numeral. That is, for example, as shown in Table 3 below,
Coordinates (3, 4) in step 21 with the angle in degrees
After the coordinate is converted to the polar coordinate format by operating the [→ rθ] key 24a in step 22 and operating the [DRG →] key 21a in step 23, the angle The conversion of the unit is performed on the numerical value "5" displayed on the numerical value display unit 11 at that time, and the meaningless conversion is performed on the value of the memory a indicating the absolute value r in the polar coordinate format. become. Therefore, in the case of handling coordinates in the polar coordinate format, if an attempt is made to convert the angle unit of the declination θ of this coordinate, the value of the b memory is displayed once, and after converting the angle unit for this, An operation of inputting the conversion result to the memory b again is required, and the operation is also complicated in this case.

[0016]

[Table 3]

As a result, the conventional calculator with a coordinate function is a
Since the coordinate format of the coordinates stored in the memory and the b memory is not clear, the operator must always manage which coordinate format is used for this coordinate. There has been a problem that the operation for converting the angle unit of the declination becomes complicated. In view of the above circumstances, the present invention provides a calculator with a coordinate function that allows an operator to easily recognize a current coordinate format, and a calculator with a coordinate function that can automatically execute coordinate calculation in an arbitrary coordinate format. In addition, the object of the present invention is to provide a calculator with a coordinate function that can always perform this conversion for a declination angle when a conversion in an angle unit is performed on coordinates in a polar coordinate format. I have.

[0018]

[0019]

A 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 converts a coordinate format between a rectangular coordinate format and a polar coordinate format. A calculator with a coordinate function comprising a conversion means, wherein a coordinate format identification means for identifying whether coordinates are displayed in a rectangular coordinate format or a polar coordinate format, and one of a rectangular coordinate calculation mode and a polar coordinate calculation mode is set. A coordinate calculation mode setting means,
When the coordinates of the calculation target are displayed in a coordinate format that does not conform to the set coordinate calculation mode, the coordinate format conversion means changes the format of the coordinates of the calculation target to the set coordinate calculation mode. to convert the compatible coordinate form
Thus, the above object is achieved.

Another calculator with a coordinate function according to the present invention comprises:
A calculator with a coordinate function, comprising: a display unit, and an angle unit conversion unit that performs angle unit conversion on a number displayed on the display unit, and can perform complex number calculation in a polar coordinate calculation mode, The display unit 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 angle unit conversion means includes: in the polar coordinate calculation mode, the identification means determines that the number is at least a complex number. If it indicates that it is a part, the angle of the complex number is converted in angle units, and
The above object is achieved.

[0021]

[Function] As described above, in a calculator with a normal coordinate function,
It is not possible to distinguish whether the coordinates consisting of two numerical values are in a rectangular coordinate format or a polar coordinate format.
In the calculator with the coordinate function of the present invention, the coordinate format display means indicates whether the coordinates are displayed in the rectangular coordinate format or the polar coordinate format. The indication of the rectangular coordinate format or the polar coordinate format can be made by displaying a character or a graphic indicating the rectangular coordinate format or the polar coordinate format. As a result, according to the calculator having the coordinate function of the present invention, for example, the operator can reliably distinguish whether the coordinates resulting from the coordinate conversion are in the rectangular coordinate format or the polar coordinate format by looking at the display. Will be able to

The display of this coordinate format can be performed according to whether the rectangular coordinate calculation mode or the polar coordinate calculation mode is set. Here, the mode set by the process such as the coordinate conversion may be canceled, for example, when a new coordinate is input. However, the new input coordinate should be handled as the coordinate format of the mode. Can also. In this case, the mode setting can be explicitly performed by any key operation. In this way, not only can the coordinate format of the processing result be displayed by the mode setting, but also if the coordinate format can be specified in advance for newly input coordinates, it is clear whether the coordinates are in the rectangular coordinate format or the polar coordinate format. Can be Furthermore, for example, when the mode of the specified value is set to the rectangular coordinate format and the coordinates are handled, if the mode is always set to one of the modes, the coordinate format of all the coordinates can be determined.

The coordinates referred to here are not limited to simply indicating points on rectangular coordinates or polar coordinates, but also include cases where complex numbers are represented in rectangular coordinates or polar coordinates, respectively. When these coordinates are complex numbers, not only addition and subtraction but also multiplication / division coordinate calculation can be performed for the two coordinates.

Moreover, in the calculator with the coordinate function of the present invention,
If the display format of the coordinates is not a predetermined format, the coordinates are converted to a predetermined coordinate format. When the predetermined coordinate format may be either of the two coordinate formats, the coordinate conversion is performed on one of the coordinates only when the format of the coordinates to be calculated is different. However, when one of the coordinate formats to be calculated is determined, even if the two coordinate formats match, it is sometimes necessary to perform coordinate conversion to a predetermined coordinate format. In the case where the format of the coordinates to be calculated is not defined, the coordinates may be determined to be in a predetermined coordinate format.

When the coordinate formats of the two coordinates are aligned in a predetermined format as described above, the designated coordinates are calculated for these coordinates. If the calculation result is in a coordinate format different from the coordinate calculation mode at that time, the coordinates of the calculation result are converted to the coordinate format of the coordinate calculation mode.

As a result, according to the calculator with the coordinate function, even when the coordinate format of the coordinates to be calculated is different from the predetermined coordinate format for calculation or when the coordinate formats are mixed, the coordinates are automatically calculated. The coordinate calculation can be performed in the same format, and the coordinate format of the calculation result can be adjusted to the coordinate calculation mode at that time.

Further, in another calculator with a coordinate function according to the present invention, in the polar coordinate calculation mode, the angle unit conversion means converts the argument in polar coordinate format coordinates into angle units. As a result, in the polar coordinate calculation mode, even if the absolute value of the coordinates in the polar coordinate format is displayed,
It becomes possible to always perform the conversion in the unit of angle with respect to the argument of this coordinate. Therefore, the identification means is displayed on the display means.
That the number shown is at least part of a complex number
In this case, the angle unit converter converts the complex argument
In the polar coordinate calculation mode.
To calculate complex numbers.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is a flowchart showing the operation of a calculator with a coordinate function when a coordinate conversion key is operated, and FIG. FIG. 3 is a flowchart showing the operation of the calculator with the coordinate function at the time of execution, FIG. 3 is a flowchart showing the operation of the calculator with the coordinate function when the angle unit conversion key is operated, and FIG. 4 is a block diagram showing the configuration of the calculator with the coordinate function. is there.

The calculator with a coordinate function according to the present embodiment uses the [a] key and the [b] key provided as function keys in the same manner as in the conventional example described above, so that the x-axis and the y-axis of the rectangular coordinates or the complex number are displayed. Real part and imaginary part or absolute value r of polar coordinates and argument θ
Input and display. Accordingly, the appearance of the calculator is the same as that of the conventional example shown in FIG. 5, and the keys are denoted by the same reference numerals, and their description is omitted.

As shown in FIG. 4, the above calculator with a coordinate function is constituted by a computer device having a CPU 3. 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 a key operation panel 2 shown in FIG.
The LCD display panel 1 also shown in FIG. 5 is connected via the driver 6, and the CPU 3 reads the key operation on the key operation panel 2 according to a program, and displays numerical values, guidance display, angle unit display, etc. on the LCD display panel 1 as appropriate. It is supposed to do.

The calculator with the coordinate function is provided by the [→ xy] key 24b or the [→ rθ] key 2 shown in FIG.
By operating the coordinate conversion key 4a, the coordinate format of the coordinates stored in the a memory and the b memory can be converted. For example, if each value of two orthogonal axes in rectangular coordinates is (x, y) and the absolute value and declination in polar coordinates are (r, θ), the coordinate conversion from rectangular coordinates to polar coordinates is as follows.

[0033]

(Equation 1)

The coordinate transformation from polar coordinates to rectangular coordinates is

[0035]

(Equation 2)

Is calculated by

The calculator with the coordinate function described above uses a
In addition to a state where the coordinate format of the coordinates stored in the memory and the b memory is not determined, there are provided a rectangular coordinate calculation mode and a polar coordinate calculation mode in which the coordinates are uniformly treated as a rectangular coordinate format or a polar coordinate format. In this coordinate calculation mode, [→
This is set when the coordinate conversion is performed by operating the coordinate conversion key of the [xy] key 24b or the [→ rθ] key 24a. Therefore, this coordinate calculation mode not only determines the coordinate format of the newly input coordinates, but also is already input or stored in the a memory and the b memory as a calculation result when the coordinate calculation mode is converted. The coordinate format of the coordinates is also converted according to the new coordinate calculation mode, so that all coordinates are handled in a unified manner in the coordinate format. When any of these coordinate calculation modes is set, the coordinate calculation mode is displayed on the guidance display section 12 of the LCD display panel 1. That is, the symbol “xy” is displayed in the rectangular coordinate calculation mode, and “r” in the polar coordinate calculation mode.
θ ”symbol is displayed.

When the coordinates stored in the memory a and the memory b are also stored in the coordinate format, it is not always necessary to execute the coordinate conversion simultaneously with the conversion in the coordinate calculation mode. . However, in this case, it is necessary to check the coordinate format of each coordinate to be operated upon when calculating the coordinates, and to convert the coordinates so as to have a predetermined coordinate format. The coordinate calculation mode may be set only when the coordinate format is determined as a result of the coordinate conversion. However, in this case, there is a case where the operator has to manage the coordinate format of the coordinates to be calculated during the coordinate calculation.

In the calculator with the coordinate function, addition and subtraction of coordinates are performed by addition and subtraction of values of respective axes in a rectangular coordinate format. That is, for example, if the coordinates in the rectangular coordinate format are (x ₁ , y ₁ ) and (x ₂ , y ₂ ),

[0040]

(Equation 3)

Thus, the coordinates (x,
Calculate y). Therefore, when the coordinates determined as the polar coordinate format are to be calculated, the coordinates are automatically converted to the rectangular coordinate format before the coordinate calculation. If the coordinate calculation mode at the time of the coordinate calculation is the polar coordinate calculation mode, the calculation result is automatically converted to a polar coordinate format and displayed. When the coordinates are complex numbers, the same calculation can be performed. However, in the case of complex multiplication / division, it may be more convenient to perform calculation in polar coordinate format. That is, if the coordinates in the polar coordinate format are (r ₁ , θ ₁ ) and (r ₂ , θ ₂ ),

[0042]

(Equation 4)

Thus, the coordinates (r,
θ) can be easily calculated.

By operating the [DRG.fwdarw.] Key 21a shown in FIG. 5 in the same manner as in the prior art, the above-mentioned calculator with a coordinate function can convert the angle unit of the numeral displayed on the numerical value display section 11. . However, when the coordinate calculation mode is the polar coordinate calculation mode, the angle of the polar coordinate is converted in angle units regardless of the display of the numerical value display unit 11 at that time.

The operation when the coordinate conversion key is operated in the calculator with the coordinate function having the above configuration will be described with reference to the flowchart of FIG.

[→ rθ] key 24a of 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 it is the key 24b, it is determined whether the mode is the rectangular coordinate calculation mode (step S2). If it is the rectangular coordinate calculation mode, there is no need to perform coordinate conversion.
The process ends as it is. However, when the coordinate calculation mode is not set or the polar coordinate calculation mode is set, the coordinates stored in the a memory and the b memory are converted into a rectangular coordinate format (step S3), and the coordinate calculation mode is changed to the rectangular coordinate calculation. After the mode is set (step S4), the process ends.

In the process of step S1, [→ r
θ] key 24a, it is determined whether or not 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 conversion. finish. However, if the coordinate calculation mode is not set or the rectangular coordinate calculation mode is set, the coordinates stored in the a memory and the b memory are converted to polar coordinate format (step S6), and the coordinate calculation mode is changed to the polar coordinate calculation mode. Is set (step S7), and the process ends.

If the coordinates have not been stored before the coordinate conversion key is operated, step S4 or S4 is executed.
The process is terminated simply by switching the coordinate calculation mode according to FIG.

An operation example of the coordinate conversion key will be described with reference to Table 4 below.

[0050]

[Table 4]

First, in a state where the coordinate format is not determined, the coordinates (3, 4) are input by operating the numeric key 21, the [a] key 24a and the [b] key 24b in step 31. Next, when the [→ rθ] key 24a is operated in step 32, the input coordinates are handled as a rectangular coordinate format, which is converted into a polar coordinate format, and the coordinate calculation mode is set to a polar coordinate calculation mode. For this reason, the numerical value display unit 11 displays the value of the memory a, which is the absolute value r of the coordinate of the conversion result, and the guidance display unit 12 displays “a” indicating the absolute value r, as well as the polar coordinate calculation. “Rθ” indicating the mode is displayed. When the [b] key 24b is subsequently operated in step 33, the value of the b memory, which is the argument θ of the conversion result coordinates, is displayed on the numerical value display unit 11, and the “a” of the guidance display unit 12 is displayed. The display switches to “b”.

Then, in step 34, the [→ xy] key 24b
Is operated, the polar coordinates are returned to the rectangular coordinate format again, and the rectangular coordinate calculation mode is set. For this reason, the numerical display unit 11 displays the value of the memory a which is the x coordinate of the rectangular coordinates, and the guidance display unit 12 displays the rectangular coordinate calculation mode together with the display of “a” indicating the x coordinate. "Xy" is displayed. In addition, the procedure 3
When the [b] key 24b is operated at 5, the value of the b memory, which is the y coordinate of the rectangular coordinates, is displayed on the numerical value display unit 11, and the display of the guidance display unit 12 is switched to "b".

As a result, the operator operates the guidance display unit 1
By looking at the display of “xy” or “rθ” in No. 2, it is possible to clearly distinguish whether the value displayed on the numerical value display unit 11 is the value of the rectangular coordinates or the value of the polar coordinates, and there is no risk of erroneous operation. .

Next, the operation of the above-described calculator with a coordinate function when calculating coordinates will be described with reference to the flowchart of FIG.

When the coordinate calculation is instructed by operating the [=] key 22b or the like shown in FIG. 5, it is first determined whether the coordinate calculation mode is the polar coordinate calculation mode (step S).
11). And if it was in polar coordinate calculation mode,
After the two polar coordinates to be calculated are transformed into a rectangular coordinate format (step S12), the coordinates are calculated (step S13). For this reason, the coordinate calculation of this embodiment is always performed in the rectangular coordinate format regardless of the coordinate calculation mode. When the individual coordinates are stored including the coordinate format, the respective coordinate formats may be different.
Therefore, in this case, the coordinate format is checked for each coordinate, and if the coordinate format is the polar coordinate format, the coordinate format is converted to the rectangular coordinate format.

If it is determined in step S11 that the mode is not the polar coordinate calculation mode, step S13 is immediately executed.
Then, the coordinates of the two coordinates to be calculated are calculated as they are. Therefore, even when the coordinate calculation mode is not set, the coordinates at that time are interpreted as a rectangular coordinate format and the coordinate calculation is performed as in the related art.

When the coordinate calculation is performed as described above, it is determined again whether or not the mode is the polar coordinate calculation mode (step S14).
After the coordinates of the calculation result are converted into polar coordinates (step S15), the coordinates of the conversion result are displayed on the LCD display panel 1 (step S16). If the mode is not the polar coordinate calculation mode, the process immediately proceeds to step S16, and the calculation result in the rectangular coordinate format is displayed as it is.

An operation example of the coordinate calculation will be described with reference to Table 5 below.

[0059]

[Table 5]

First, when the rectangular coordinate calculation mode is set, the rectangular coordinates (2, 3) are input in step 41, and then the [→ rθ] key 24a is operated in step 42. The coordinates are converted into the 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
When 5) is input and the [=] key 22b is further operated in step 45, these polar coordinates are converted into a rectangular coordinate format and added, and the calculation result is converted into a polar coordinate format. Displays the value of the memory a which is the absolute value r. In step 46, the [b] key 24
When b is operated, the numerical value display unit 11 displays the value of the b memory, which is the declination θ of the polar coordinate as the calculation result.

As a result, even when the operator inputs the rectangular coordinates and the polar coordinates in a mixed manner, the operator can perform the coordinate calculation without performing the coordinate conversion operation as in the case where only the rectangular coordinates are input. become able to. Also, at this time, the coordinate format of the displayed coordinates is changed to the guidance display unit 12.
Can be confirmed by the display of “xy” or “rθ”, so that confusion does not occur.

Further, the operation when the angle unit conversion key is operated in the calculator with the coordinate function will be described with reference to the flowchart of FIG.

When the [DRG →] key 21a shown in FIG. 5 is operated to instruct the conversion of the angle unit, first, it is determined whether or not the mode is the polar coordinate calculation mode (step S2).
1). When the mode is not the polar coordinate calculation mode, the unit of the numerical value displayed on the numerical value display unit 11 is converted into an angle unit as in the conventional case (step S22), and the converted angle unit is displayed on the angle unit display unit 13. At the same time (step S23), the conversion result is displayed on the numerical value display section 11 (step S23). Each time the [DRG →] key 21a is operated, the conversion of the angle unit is performed by sequentially changing the angle units of degree, radian, and grad.

If it is determined in step S21 that the mode is the polar coordinate calculation mode, the polar coordinate declination θ stored in the memory b is converted in angle units (step S25), and the conversion result is further obtained. Is input to the b memory (step S26), and the above-described step S2
The processing shifts to processing from step 2.

An example of the conversion operation in the above angle unit will be described with reference to Table 6 below.

[0066]

[Table 6]

First, when the angle unit is degree and the polar coordinate calculation mode is set, polar coordinates (3, 30) are input in step 51. Then, in step 52, [DRG
When the key 21a is operated, the polar angle declination θ is converted in angle units, the result of conversion in radians is displayed on the numerical value display unit 11, and the display of the angle unit display unit 13 is “DEG”. To “RAD”.

In step 53, the [a] key 2
When the [DRG →] key 21a is again operated in step 54 while the input absolute value r of the polar coordinate is displayed by operating the 4a, the displayed numeral "3" is not displayed. The angle unit θ is converted again in polar units with respect to the polar coordinate declination θ, the conversion result in grad units is displayed on the numerical value display unit 11, and the display on the angle unit display unit 13 is changed to “GRA”.
D ". Then, in step 55, [DRG
When the user operates the [] key 21a, the angle unit conversion is performed again, the same degree unit conversion result as when the input was input is displayed on the numerical value display unit 11, and the display on the angle unit display unit 13 also returns to "DEG".

As a result, in the polar coordinate calculation mode, since the conversion in the angle unit is always performed on the argument θ of the polar coordinate, the conversion operation in the angle unit can be easily performed.

[0070]

As is apparent from the above description, according to the calculator with the coordinate function of the present invention, the coordinate format of the coordinates determined in the coordinate calculation mode can be reliably distinguished by the display on the display unit. In addition, there is no mistake between the rectangular coordinate format and the polar coordinate format. Moreover , even when the coordinate format determined by the coordinate calculation mode is different from the predetermined coordinate format for the calculation or when the coordinate formats are mixed, the coordinate calculation can be performed as it is. Can be reduced in key operation for instructing. Further , according to another calculator with a coordinate function according to the present invention, in the polar coordinate calculation mode, the angle
For converting <br/> angle unit unit conversion means for the deflection angle in the polar form of coordinates. As a result, in the polar coordinate calculation mode
Displays the absolute value of the coordinates, even in polar coordinates.
Even if the angle is always
It is possible to perform the order conversion. Therefore, identification
If the number displayed on the display means is at least a complex number
Is also a part, the angle unit conversion means
Since angle unit conversion is performed on the argument of a complex number,
Complex numbers can be calculated in the target calculation mode.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, 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 an operation of the calculator with a coordinate function shown in FIG. 1 when executing coordinate calculation.

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

FIG. 4 is a block diagram showing a configuration of a calculator with a 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 unit 13 Angle unit display unit 21a [DRG →] key 22 Four arithmetic calculation keys 24a [a] key, [→ rθ] key 24b [b] key, [→ xy] key

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-94056 (JP, A) JP-A 1-123256 (JP, U) JP-A 58-101256 (JP, U) JP-A 61- 81360 (JP, U) JP-A 62-66353 (JP, U) JP-A 1-106951 (JP, U) JP-A 62-20026 (JP, Y2) JP-A 59-26428 (JP, Y2)

Claims (2)

(57) [Claims] 1. A calculator with a coordinate function having at least one of a rectangular coordinate calculation mode and a polar coordinate calculation mode, and comprising coordinate format conversion means for converting a coordinate format between a rectangular coordinate format and a polar coordinate format. A coordinate format identifying means for identifying whether the coordinates are displayed in a rectangular coordinate format or a polar coordinate format, and a coordinate calculation mode setting means for setting one of a rectangular coordinate calculation mode and a polar coordinate calculation mode; The means, when the coordinates to be calculated are displayed in a coordinate format that does not conform to the set coordinate calculation mode, change the format of the coordinates to be calculated to a coordinate format that conforms to the set coordinate calculation mode. Calculator with coordinate function to convert to. 2. A display device comprising: a display unit; and an angle unit conversion unit for converting the number displayed on the display unit into an angle unit, with a coordinate function capable of performing a complex number calculation in a polar coordinate calculation mode. A calculator, further comprising identification means for indicating that the number displayed on the display means is at least a part of a complex number, wherein the angle unit conversion means is such that the identification means is in the polar coordinate calculation mode. If the number indicates that it is at least a part of a complex number, a calculator with a coordinate function that performs angle unit conversion on the argument of the complex number.