Python numpy.sinc()用法及代码示例

2024-07-17 22:13| 来源: 网络整理| 查看: 265

numpy.sinc(array)：此数学函数可帮助用户计算所有x(作为数组元素)的sinc函数。

参数： array: [array_like] elements are in radians. 2pi Radians = 36o degrees

返回： An array with sinc value of x for all x i.e. array elements.

代码1：工作

# Python3 program explaining # sinc() function import numpy as np import math in_array = [0, math.pi / 2, np.pi / 3, np.pi] print ("Input array:\n", in_array) sinc_Values = np.sinc(in_array) print ("\nSinc values:\n", sinc_Values)

输出：

Input array: [0, 1.5707963267948966, 1.0471975511965976, 3.141592653589793] Sinc values: [ 1. -0.19765087 -0.04490537 -0.04359863]

代码2：图形表示

# Python program showing Graphical # representation of sinc() function import numpy as np import matplotlib.pyplot as plt in_array = np.linspace(-np.pi, np.pi, 12) out_array = np.sinc(in_array) print("in_array:", in_array) print("\nout_array:", out_array) # red for numpy.sinc() plt.plot(in_array, out_array, color = 'red', marker = "o") plt.title("numpy.sinc()") 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: [-4.35986286e-02 1.20821077e-01 -4.02499006e-04 -2.17227951e-01 1.61555129e-01 8.71125992e-01 8.71125992e-01 1.61555129e-01 -2.17227951e-01 -4.02499006e-04 1.20821077e-01 -4.35986286e-02]