create two matrices from a larger matrix

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tony karamp
tony karamp 2013-3-28
hi,
so I have this matrix harmonics [40x99226] and I want to create two matrices from the original, called harmA and harmB. harmA will have the rows 1,3,5...39 while harmB will get the rest 2,4,6...40. The new matrices will still carry all the 99226 samples that belong to each row. This is what I have so far, but it's not doing the trick.
Thank you for taking the time, I appreciate it!

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Wayne King
Wayne King 2013-3-28
编辑：Wayne King 2013-3-28
Just do:
X = randn(40,99226);
harmA = X(1:2:end,:);
harmB = X(2:2:end,:);
MATLAB is generally really good at handling these types of matrix-vector operations without loops.

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tony karamp
tony karamp 2013-3-28
omg... you are right!
I had tried
harmA = X(1:2:end);
harmB = X(2:2:end);
but didn't work.
I didn't think to add the other dimension.
Thanks a bunch

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