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Re: Speedup/Refaktoring loop? Extended...
From: |
Andreas Romeyke |
Subject: |
Re: Speedup/Refaktoring loop? Extended... |
Date: |
Wed, 27 Aug 2008 16:10:16 +0200 |
Hello,
> a=transpose(U) * X;
> b=transpose(U) * U * V;
> V=V .* a ./ b;
> a=X * transpose(V);
> b=U * V * transpose(V);
> U=U .* a ./ b;
BTW, could anyone describe why Matlab 7.3 runs 4 times faster than
Octave 3.02 in this piece of code? AFAIK both programs uses the
Altlas/Lapack libraries. And the code is fully vectorized here.
Could you explain the difference?
Bye Andreas
--
Software Developer / Dipl. Inform. (FH)
Max Planck Institute for Human Cognitive and Brain Sciences
Department of Psychology
Stephanstr. 1a, 04103 Leipzig, Germany
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- Speedup/Refaktoring loop?, Andreas Romeyke, 2008/08/19
- Re: Speedup/Refaktoring loop?, Thomas Weber, 2008/08/19
- Re: Speedup/Refaktoring loop?, Jaroslav Hajek, 2008/08/19
- Re: Speedup/Refaktoring loop? Extended..., Andreas Romeyke, 2008/08/19
- Re: Speedup/Refaktoring loop? Extended..., Jaroslav Hajek, 2008/08/19
- Re: Speedup/Refaktoring loop? Extended..., Andreas Romeyke, 2008/08/19
- Re: Speedup/Refaktoring loop? Extended..., Jaroslav Hajek, 2008/08/19
- Re: Speedup/Refaktoring loop? Extended...,
Andreas Romeyke <=
- Re: Speedup/Refaktoring loop? Extended..., Dmitri A. Sergatskov, 2008/08/27
- Re: Speedup/Refaktoring loop? Extended..., David Bateman, 2008/08/27
- Re: Speedup/Refaktoring loop? Extended..., Andreas Romeyke, 2008/08/27
- Re: Speedup/Refaktoring loop? Extended..., John W. Eaton, 2008/08/27