atan2
double atan2 (double yValue, double xValue);
Purpose
Computes the principal value of the arc tangent of (yValue/xValue) using the signs of both arguments to determine the quadrant of the return value.
Parameters
| Input | ||
| Name | Type | Description |
| yValue | double | Contains the numerator of the value used as the argument to the function. |
| xValue | double | Contains the denominator of the value used as the argument to the function. |
Return Value
| Name | Type | Description |
| result | double | Contains the arc tangent of (yValue/xValue) returned by the function. The returned value is in the range [-PI,PI]. If both xValue and yValue are zero, atan2 returns 0. |
Additional Information
Library: ANSI C Library
Include file: ansi_c.h
LabWindows/CVI compatibility: LabWindows/CVI 3.0 and later
Example
Refer to analysis\iirfiltr.cws for an example of using the atan2 function.