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atan2()

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Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Calculates the angle, in radians, between the positive x-axis and the ray from the origin to the point (y, x).

Syntax

atan2(y,x)

Learn more about syntax conventions.

Parameters

Name Type Required Description
y real ✔️ The Y coordinate.
x real ✔️ The X coordinate.

Returns

Returns the angle in radians between the positive x-axis and the ray from the origin to the point (y, x).

Examples

The following example returns the angle measurements in radians.

print atan2_0 = atan2(1,1) // Pi / 4 radians (45 degrees)
| extend atan2_1 = atan2(0,-1) // Pi radians (180 degrees)
| extend atan2_2 = atan2(-1,0) // - Pi / 2 radians (-90 degrees)

Output

atan2_0 atan2_1 atan2_2
0.785398163397448 3.14159265358979 -1.5707963267949