One miltidimensional matrix with shape (2, 50, 25, 3):
xx = np.random.randn(2, 50, 25, 3)
I want to calculate the sum of squares of the last dimension. The result should be a matrix with a shape (2, 50, 25, 1).
[np.sum(x) for x in np.square(features_displacement[0][0][:])[:]]
This code can successfully calculate the one dimension, output a list with shape (25,1), but how can I calculate all the dimensions as described above?
You can apply the numpy functions along the axis you want, for example:
np.sum(np.square(xx), axis=3)
Will produce an array of shape (2, 50, 25)
. Not exactly sure this is what you want, if not please be more specific :-)
用这个:
sum_of_squares = np.sum(np.square(features_displacement), axis=-1)
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