`numpy:angle`

source: /dev/numpy/build-install/usr/lib/python3.14/site-packages/numpy/lib/_function_base_impl.py:1682

Signature

def angle(z, deg = False)

Summary

Return the angle of the complex argument.

Parameters

z : array_like: A complex number or sequence of complex numbers.
deg : bool, optional: Return angle in degrees if True, radians if False (default).

Returns

angle : ndarray or scalar: The counterclockwise angle from the positive real axis on the complex plane in the range (-pi, pi], with dtype as numpy.float64.

Notes

This function passes the imaginary and real parts of the argument to arctan2 to compute the result; consequently, it follows the convention of arctan2 when the magnitude of the argument is zero. See example.

Examples

import numpy as np

✓

np.angle([1.0, 1.0j, 1+1j])               # in radians
np.angle(1+1j, deg=True)                  # in degrees

✗

np.float64(45.0)

np.angle([0., -0., complex(0., -0.), complex(-0., -0.)])  # convention

✓

array([ 0.        ,  3.14159265, -0.        , -3.14159265])

Aliases

numpy.angle