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guilhermefgs/init_theta_nn.py

Last active October 27, 2019 06:08
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Inicialização aleatória dos parâmetros theta em redes neurais
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init_theta_nn.py
def randomInit(input_layer_size, hidden_layer_size, num_labels):
# Parâmetros da primeira camada (incluindo bias)
# As matrizes têm formato (num_entradas, num_saidas)
size1 = (hidden_layer_size, input_layer_size+1)
theta1_ini = np.random.normal(0, .1, size=size1)
# Parâmetros da primeira camada (incluindo bias)
size2 = (num_labels, hidden_layer_size+1)
theta2_ini = np.random.normal(0, .1, size=size2)
return (theta1_ini, theta2_ini)
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