Issues in Matrix multiplication

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Nikolaos Zafirakis
Nikolaos Zafirakis on 16 Apr 2019
Edited: Matt J on 16 Apr 2019
I have 100 6 by 6 matrices and 100 6 by 1 matrices and I want to multiply them. If I do X=A.*B it does not give me the correct solution. Does anyone know a way around this?

Answers (2)

Matt J
Matt J on 16 Apr 2019
Edited: Matt J on 16 Apr 2019
A somewhat less efficient solution (but which uses no 3rd party files) is,
A=rand(6,6,100);
B=rand(6,1,100);
C=sum( A.*reshape(B,1,6,[]) ,2);

Matt J
Matt J on 16 Apr 2019
Edited: Matt J on 16 Apr 2019
Use mtimesx from the File Exchange
Example:
A=rand(6,6,100);
B=rand(6,1,100);
C=mtimesx(A,B);

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