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bigsnarfdude/gist:4d497d8e008ddc195345b9d12244c658

Created July 17, 2016 00:06
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sigmoid function
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gistfile1.txt
def sigmoid(z):
"""The sigmoid function."""
return 1.0/(1.0+np.exp(-z))
def sigmoid_prime(z):
"""Derivative of the sigmoid function."""
return sigmoid(z)*(1-sigmoid(z))
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