Element wise multiplication of a 4D Matrix

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Say I have a 4D matrix called X_values the size of 3x3x3x10. I wanted to do an element wise multiplication along the 4th dimension and obtain a 3x3x3 matrix at the end. Any recommendation on how to do it?

Answers (1)

John D'Errico
John D'Errico on 4 Dec 2023
Edited: John D'Errico on 4 Dec 2023
A confusing question. MAYBE you are asking how to take the product of the elements along the 4th dimension? That is consistent with what you are asking for a result. And that is trivial. Just use prod. It works just like sum.
A = rand(3,3,3,10); % just create a matrix of the right shape
B = prod(A,4);
size(B)
ans = 1×3
3 3 3

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