标准Logistic函数为:
f(x) = 1 / ( 1 + exp(-x) )
其导函数为:
f'(x) = f(x) * ( 1 - f(x) )
下面使用matplotlib绘制逻辑斯蒂函数及其导函数的曲线。
Python代码:
import numpy as np
import matplotlib.pyplot as plt
a = np.linspace(-10, 10, 1000)
b = 1.0 / (1.0 + np.exp(-a ...
标准Logistic函数为:
f(x) = 1 / ( 1 + exp(-x) )
其导函数为:
f'(x) = f(x) * ( 1 - f(x) )
下面使用matplotlib绘制逻辑斯蒂函数及其导函数的曲线。
Python代码:
import numpy as np
import matplotlib.pyplot as plt
a = np.linspace(-10, 10, 1000)
b = 1.0 / (1.0 + np.exp(-a ...