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Fill a matrix without for-loop
This should be an easy one, but not for me :( Please help because I've got a headache from this one. Suppose t is a array, that is t=[1;2;3;4;5;6;......;100] e.g. How to fill a matrix without using for- loop in similar fashion with the following code, in order to accelerate the execution:
for i=1:100;k(i,:)=t(i,1):(t(i,1)+100);end
Thanks in advance
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 Marko
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11/29/2010 10:16:20 PM |
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One approach:
k2 = ones(length(t),length(t)+1);
k2(:,1) = t;
k2 = cumsum(k2,2);
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Matt
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11/29/2010 10:27:05 PM
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Another way:
k = bsxfun(@plus,t,0:100)
Bruno
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Bruno
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11/30/2010 6:53:05 AM
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Thanks Bruno, Matt
Works like a charm. From 2s to 0.2s. 10 times faster
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Marko
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11/30/2010 9:13:43 AM
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