Multiplying even and odd columns separately?
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I have a matrix called 'displacements'
It has 50 columns
I want to multiply all the even columns by 5 and all the odd columns by 8
Anyone know a quick way to do this?
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Giorgos Papakonstantinou
le 6 Mar 2015
Here is one way:
A =rand(100, 50);
idx = mod(1:size(A,2), 2) ==1; % logical indexing of the odd numbers
theodd = A(:, idx)*8;
theeven = A(:, ~idx)*5;
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