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numpy.angle() in Python

  • 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






# Python program explaining
# numpy.angle() function
# when we want answer in radian
  
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




# Python program explaining
# numpy.angle() function
# when we want answer in degrees
  
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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