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Cost Function in Backpropagation_Algorithm_using_Softmax #2

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Legitao opened this issue Mar 4, 2021 · 0 comments
Open

Cost Function in Backpropagation_Algorithm_using_Softmax #2

Legitao opened this issue Mar 4, 2021 · 0 comments

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@Legitao
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Legitao commented Mar 4, 2021

The line to calculate the cost of Softmax output is not quite correct. Since Y and A are of shape (n_categories, batch_size), the cost should be
image

So I think the correct version should be np.mean(-np.sum(Y * np.log(A.T), axis=0))
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