Python中的 numpy.sinh()
numpy.sinh()是一个数学函数,可帮助用户计算所有 x(作为数组元素)的双曲正弦值。
等价于1/2 * (np.exp(x) – np.exp(-x)) 或 -1j * np.sin(1j*x)。
Syntax: numpy.sinh(x[, out]) = ufunc ‘sin’)
Parameters :
array : [array_like] elements are in radians.
2pi Radians = 36o degrees
Return : An array with hyperbolic sine of x for all x i.e. array elements
代码#1:工作
# Python3 program explaining
# sinh() function
import numpy as np
import math
in_array = [0, math.pi / 2, np.pi / 3, np.pi]
print ("Input array : \n", in_array)
Sinh_Values = np.sinh(in_array)
print ("\nSine Hyperbolic values : \n", Sinh_Values)
输出 :
Input array :
[0, 1.5707963267948966, 1.0471975511965976, 3.141592653589793]
Sine Hyperbolic values :
[ 0. 2.3012989 1.24936705 11.54873936]
代码 #2:图形表示
# Python program showing Graphical
# representation of sinh() function
import numpy as np
import matplotlib.pyplot as plt
in_array = np.linspace(-np.pi, np.pi, 12)
out_array = np.sinh(in_array)
print("in_array : ", in_array)
print("\nout_array : ", out_array)
# red for numpy.sinh()
plt.plot(in_array, out_array, color = 'red', marker = "o")
plt.title("numpy.sinh()")
plt.xlabel("X")
plt.ylabel("Y")
plt.show()
输出 :
in_array : [-3.14159265 -2.57039399 -1.99919533 -1.42799666 -0.856798 -0.28559933
0.28559933 0.856798 1.42799666 1.99919533 2.57039399 3.14159265]
out_array : [-11.54873936 -6.49723393 -3.62383424 -1.9652737 -0.96554336
-0.28949778 0.28949778 0.96554336 1.9652737 3.62383424
6.49723393 11.54873936]
参考 :
https://docs.scipy.org/doc/numpy-1.14.0/reference/generated/numpy.sinh.html#numpy.sinh
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