활성화 함수 Sigmoid, step, ReLU function

활성화 함수 python 코드

python 코드

    import numpy as np

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

    def step_function(x):
        return np.array(x > 0, dtype=np.int)

    def relu(x):
        return np.maximum(0, x)

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