Use the radians function in APL to convert an angle from degrees to radians. The conversion formula is radians = (π / 180) × angle_in_degrees.
radians is useful as a preprocessing step before calling trigonometric functions such as sin, cos, or tan, which all expect their input in radians. If you have angle data in degrees, pass it through radians before applying any trigonometric operation.
For users of other query languages
If you come from other query languages, this section explains how to adjust your existing queries to achieve the same results in APL.
Splunk SPL doesn't include a built-in radians() function. You compute the conversion manually by multiplying the degree value by pi() / 180.
['sample-http-logs']
| extend angle_rad = radians(angle_deg)In SQL Server and PostgreSQL, RADIANS() is a built-in function with identical semantics to the APL version.
['sample-http-logs']
| extend angle_rad = radians(angle_deg)Usage
Syntax
radians(a)Parameters
| Name | Type | Required | Description |
|---|---|---|---|
a |
real | Yes | The angle in degrees to convert. |
Returns
The angle in radians corresponding to the input degree value.
Example
Use radians to convert an angle in degrees to radians.
Query
print result = radians(180)Output
| result |
|---|
| 3.1416 |
List of related functions
- degrees: Converts radians to degrees. Use it for the inverse conversion after trigonometric computations.
- pi: Returns the constant π. Use it when you want to compute radian conversions manually instead of using
radians. - sin: Returns the sine of an angle in radians. Use
radiansto prepare degree inputs before callingsin. - cos: Returns the cosine of an angle in radians. Use
radiansto prepare degree inputs before callingcos. - tan: Returns the tangent of an angle in radians. Use
radiansto prepare degree inputs before callingtan.