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Re: 'for' loop vectorization
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From: |
Francesco Potorti` |
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Subject: |
Re: 'for' loop vectorization |
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Date: |
Wed, 24 Oct 2007 20:04:02 +0200 |
I managed to obtain a slight speedup of the triu function like this:
octave> n=3000
n = 3000
octave> t=cputime;a=triu(ones(n,n));cputime-t
ans = 0.77605
octave>
t=cputime;b=ones(n,n);z=0:n*n-1;b((((0:n-1)'*ones(1,n))(:))'>z/n)=0;cputime-t
ans = 0.69204
octave> all(all(a==b))
ans = 1
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