Python 中的 numpy.sin()
哎哎哎:# t0]https://www . geeksforgeeks . org/num py-sin-python/
numpy.sin(x[，out]) = ufunc 'sin') : 这个数学函数帮助用户计算所有 x(作为数组元素)的三角正弦。 参数:
array : [array_like]elements are in radians.
2pi Radians = 36o degrees
返回:
An array with trigonometric sine of
x for all x i.e. array elements
代码#1:工作
计算机编程语言
# Python program explaining
# sin() function
import numpy as np
import math
in_array = [0, math.pi / 2, np.pi / 3, np.pi]
print ("Input array : \n", in_array)
Sin_Values = np.sin(in_array)
print ("\nSine values : \n", Sin_Values)
输出:
Input array :
[0, 1.5707963267948966, 1.0471975511965976, 3.141592653589793]
Sine values :
[ 0.00000000e+00 1.00000000e+00 8.66025404e-01 1.22464680e-16]
代码#2:图形表示
计算机编程语言
# Python program showing
# Graphical representation of
# sin() function
import numpy as np
import matplotlib.pyplot as plt
in_array = np.linspace(-np.pi, np.pi, 12)
out_array = np.sin(in_array)
print("in_array : ", in_array)
print("\nout_array : ", out_array)
# red for numpy.sin()
plt.plot(in_array, out_array, color = 'red', marker = "o")
plt.title("numpy.sin()")
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 : [ -1.22464680e-16 -5.40640817e-01 -9.09631995e-01 -9.89821442e-01
-7.55749574e-01 -2.81732557e-01 2.81732557e-01 7.55749574e-01
9.89821442e-01 9.09631995e-01 5.40640817e-01 1.22464680e-16]
参考文献: https://docs . scipy . org/doc/numpy-dev/reference/generated/numpy . sin . html # numpy . sin 。
