Python中的 numpy.radians() 和 deg2rad()

numpy.radians()是一个数学函数，可帮助用户将角度从度数转换为弧度。

Syntax : numpy.radians(x[, out]) = ufunc ‘radians’)
Parameters :

array : [array_like] elements are in degrees.
out : [ndaaray, optional]Output array of same shape as x.
          2pi Radians = 36o degrees

Return : An array with radian values in place of degree values.

代码#1：工作

# Python3 program explaining
# degrees() function
  
import numpy as np
import math
  
in_array = np.arange(10.) * 90
print ("Degree values : \n", in_array)
  
radian_Values = np.radians(in_array)
print ("\nRadian values : \n", radian_Values)

输出 ：

Degree values : 
 [   0.   90.  180.  270.  360.  450.  540.  630.  720.  810.]

Radian values : 
 [  0.           1.57079633   3.14159265   4.71238898   6.28318531
   7.85398163   9.42477796  10.99557429  12.56637061  14.13716694]

numpy.deg2rad(x[, out]) = ufunc 'deg2rad') ：此数学函数可帮助用户将角度从度数转换为弧度

Parameters :

array : [array_like] elements are in radians.
out : [ndaaray, optional]Output array of same shape as x.
          2pi Radians = 36o degrees

Return : Corresponding angles in radians.

代码#2：deg2rad() 等价于弧度()

# Python3 program explaining
# rad2deg() function
  
import numpy as np
import math
  
degree = np.arange(10.) * 90
print ("Degree values : \n", degree)
  
radian = np.deg2rad(degree)
print ("\nradian values : \n", radian)

输出 ：

Degree values : 
 [   0.   90.  180.  270.  360.  450.  540.  630.  720.  810.]

radian values : 
 [  0.           1.57079633   3.14159265   4.71238898   6.28318531
   7.85398163   9.42477796  10.99557429  12.56637061  14.13716694]

参考资料： https://docs.scipy.org/doc/numpy-dev/reference/generated/numpy.radians.html#numpy.radians
.