sigmoid函数

import matplotlib.pyplot as plt
import numpy as np

def sigmoid(x):
    return 1/(1+np.exp(-x))

def plot_sigmoid():
    # param:起点，终点，间距
    x = np.arange(-10, 10, 0.1) #起点，终点，间距
    y = sigmoid(x)
    plt.plot(x, y)
    plt.show()
 
if __name__ == '__main__':
    plot_sigmoid()

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