multiply an array of scalars by a 3D matrix

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Mireia Boneta Camí
Mireia Boneta Camí le 10 Oct 2020
Commenté : Ameer Hamza le 10 Oct 2020
I have a vector 10x1 and a 3D matrix NxNx10, and what I want to do is to multiply every dimension of the matrix (the 10 of them) by every scalar of the vector. I mean every of the 10 dimensions by a different scalar of the vector. Do you know if it exists a way to do it without using fors?

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Ameer Hamza
Ameer Hamza le 10 Oct 2020
Modifié(e) : Ameer Hamza le 10 Oct 2020
If you are using a recent version of MATLAB with implicit expansion enabled
A; % 10x1 array
M; % NxNx10 array
M_new = M.*reshape(A, 1, 1, []);
on older releases
M_new = bsxfun(@times, M, reshape(A, 1, 1, []))
  2 commentaires
Mireia Boneta Camí
Mireia Boneta Camí le 10 Oct 2020
Thanks it is just what I wanted!!
Ameer Hamza
Ameer Hamza le 10 Oct 2020
I am glad to be of help!

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