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Asked by Tétef
on 22 Feb 2013

I'm looking for how to vectorize this loop :

r=zeros(1,length(r1)); for i=1:length(r1); r(i)=sum(r1(1:i).*r2(i:-1:1)); end

r1 and r2 are two vectors of the same size.

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Answer by Teja Muppirala
on 22 Feb 2013

Accepted answer

Faster for long vectors, slower for short ones:

r = conv(r1,r2); r = r(1:numel(r1));

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