[Rd] matrix multiplication speed R
Prof Brian Ripley
ripley at stats.ox.ac.uk
Tue May 10 08:07:46 CEST 2011
On Mon, 9 May 2011, Sharpie wrote:
> aftar wrote:
>> Can we use BLAS in R X64 for windows?
> You are already using BLAS in R as R includes its own BLAS library. On
> Windows the 64-bit DLL is located at R_HOME\bin\x64\Rblas.dll.
> If you are asking about swapping that out for an optimized BLAS, you will
> probably have to:
> 1. Obtain and build an optimized BLAS such as ATLAS, Goto BLAS or Intel
> 2. Build your own copy of R from source that links against this new blas.
> If there is a simpler way, I'm sure someone will correct me.
All you need is a copy of Rblas.dll containing the BLAS you wish to
use. You do not need to rebuild anything else in R. Some (not
recent) such Rblas.dll are made available: see the R for Windows
documentation. In addition, Ei-ji Nakama has posted (on this list)
how to use the Goto BLAS on x64 Windows.
> Charlie Sharpsteen
> Undergraduate-- Environmental Resources Engineering
> Humboldt State University
> View this message in context: http://r.789695.n4.nabble.com/matrix-multiplication-speed-R-tp3217257p3510979.html
> Sent from the R devel mailing list archive at Nabble.com.
> R-devel at r-project.org mailing list
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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