In the first required assignment, there is this sentence : A trick when you want to flatten a matrix X of shape (a,b,c,d) to a matrix X_flatten of shape (b∗c∗d, a) is to use: X_flatten = X.reshape(X.shape[0], -1).T how to use -1?

I don't understand the usage of -1 in reshaping

Kic July 11, 2023, 8:11am 3

Please check out this thread written by our mentor Paul M.

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