Re: [R] Ubuntu vs Mac OS X

From: Dirk Eddelbuettel <edd_at_debian.org>
Date: Sat, 26 Apr 2008 09:58:37 -0500

On 26 April 2008 at 12:27, Prof Brian Ripley wrote:
| 3) If you are doing matrix algebra you want an optimized BLAS. The CRAN
| build of R for Mac OS by default uses vecLib (which is optimized by
| Apple). On other OSes R can be built to use optimized BLAS (see the
| manual) -- my understanding is that on Debian derivatives it is built to
| make use of the system libblas, and you can install versions of the latter
| based on ATLAS. Some optimized BLAS can make use of multiple CPUs.

Yes, on Ubuntu, use 'apt-get install atlas3-base' for basic tuned Atlas, or 'apt-get install atlas3-sse2' assuming that sse2 is the closest fit to the cpu in question.  

Dirk

-- 
Three out of two people have difficulties with fractions.

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Received on Sat 26 Apr 2008 - 15:52:31 GMT

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