Dear all, I recently submitted a question to the R-help mailing list, because I noticed that matrix multiplication was giving me trouble (basically, that there were some times when a result was NaN): http://tolstoy.newcastle.edu.au/R/e15/help/11/09/7165.html
As it is mentioned in the end of the thread, the solution was to recompile R against the reference blas and lapack libraries, and avoid the atlas that I was using. So it seems that the problem is not R-related, but atlas-related, and linked to gentoo, I would like to share the problem with you, just in case somebody has any clue on what is wrong with atlas. Although I have firstly used a very aggressive cflags to compile atlas (-Ofast), I suspected that the problem was that, but I recompiled atlas using -O2 and the problem still presists with atlas, but is solved with reference. I am using atlas-3.9.23-r4, R-2.13.1 and gcc-4.6.1 Thank you, -- - Xavier -
