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vectorize without using loop

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Eric
Eric 2013-3-18
I believe there's way to vectorize the following code without using the loop
for i = 1:length(indtrn)
Xtrn(i, :) = X(indtrn(i), indtrn);
end
Can someone shed me some light? Thanks in advance.

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Azzi Abdelmalek
Azzi Abdelmalek 2013-3-18
out=X(indtrn,indtrn)

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