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. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
