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From: Oleg Komarov on 11 May 2010 04:22
"Artur Racu"
> hy everybody,
>
> how can help me, i hve a retangular matrix and belove the diagonal i have zeros how can i remove them without removing zeros above the diagonal,
>
> thank you,
> Artur

I suppose you have, for example purposes:
rectM = rand(3,4)
rectM =
0.35 0.55 0.76 0.57
0.83 0.92 0.75 0.08
0.59 0.29 0.38 0.05

Then, creating the index for the elements under the diagonal:
IDXl = logical(tril(ones(size(rectM)),-1))
IDXl =
0 0 0 0
1 0 0 0
1 1 0 0

Finally I don't know what you mean by removing elements...I interpret it as NaNning them out:
rectM(IDXl) = NaN
rectM =
0.35 0.55 0.76 0.57
NaN 0.92 0.75 0.08
NaN NaN 0.38 0.05

Oleg
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Prev: rectangular matrix
Next: How can I replace the repeated or relatively close numbers in an array by their average and then remove the repeated averages from the returned array?