sum of products of matrix

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Mate 2u
Mate 2u on 17 Jul 2012
Hi all I have a matrix of size 294x34. I want to to have the products of all rows so I get a 294x1 matrix of all the products of the rows. Then I want to have the single product of all 294 elements.
Now, I want this to work even with zeros. So if zero is in their, I would like to ignore it.

Accepted Answer

Jan on 17 Jul 2012
Edited: Jan on 17 Jul 2012
X = round((rand(294, 34) - 0.5) * 10) / 2.4;
X(X == 0) = 1;
Prow = prod(X, 2);
Pall = prod(Prow);
It is not trivial to find (random) test data, which do not reply Inf or 0 due to over- or underflow.
  1 Comment
Mate 2u
Mate 2u on 17 Jul 2012
Thank you Jan

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