numpy.angle() in Python (original) (raw)

Last Updated : 28 Nov, 2018

numpy.angle() function is used when we want to compute the angle of the complex argument. A complex number is represented by “ x + yi ” where x and y are real number and i= (-1)^1/2. The angle is calculated by the formula tan-1(x/y).

Syntax : numpy.angle(z, deg=0)

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).

Return :
angle : The counterclockwise angle from the positive real axis on the complex plane, with dtype as numpy.float64.

Code #1 : Working

import numpy as geek

in_list = [ 2.0 , 1.0j , 1 + 1j ]

print ( "Input list : " , in_list)

out_angle = geek.angle(in_list)

print ( "output angle in radians : " , out_angle)

Output :

Input list : [2.0, 1j, (1+1j)] output angle in radians : [ 0. 1.57079633 0.78539816]

Code #2 : Working

import numpy as geek

in_list = [ 2.0 , 1.0j , 1 + 1j ]

print ( "Input list : " , in_list)

out_angle = geek.angle(in_list, deg = True )

print ( "output angle in degrees : " , out_angle)

Output :

Input list : [2.0, 1j, (1+1j)] output angle in degrees : [ 0. 90. 45.]

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