# How to make 2 matrix out of 1 one matrix??

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Ali nouri on 25 Jun 2020
Commented: Alan Stevens on 26 Jun 2020
Hi Guys,
I have a 8760X30 matrix, which is included with the positive and negative number. Now I want to make 2 matrix of the originally matrix with the same dimension.
The difference is in one matrix should included the possitive number from the originally matrix and replace the negatives with zero, and in the other matrix should included with negative value and replace positive number with zero.
How can I do it?

Alan Stevens on 25 Jun 2020
If your first matrix is A, then:
ix = find(A>0); B = A; B(ix) = 0;
ix = find(A<0); C = A; C(ix) = 0;
##### 2 CommentsShowHide 1 older comment
Alan Stevens on 26 Jun 2020
I agree that the "find" version is not the most efficient. However, sometimes clarity is more important than efficiency, and I suggest that, for a novice, the "find" version is clearer.

Sugar Daddy on 25 Jun 2020
Edited: madhan ravi on 26 Jun 2020
Aneg = (A<0) .* A
Apos = (A>0) .* A
Sugar Daddy on 26 Jun 2020