Returns the phase of the argument in radians. Unlike the functions phase and phase_rad , this function wraps from $-\pi$ to $\pi$ radians. See arg function above for a version that returns phase in degrees.

### Arguments

 Number Type Compulsory Default Description 1 real/complex array Yes vector

### Returns

Return type: real/complex array

Returns the arc tangent of the argument. Result is in radians.