I have a Windows box set up with two 64 bit Intel Xeon X5680 3.33 GHz processors (6 cores each) and 12 GB of RAM. I want to use it to perform matrix operations (multiplication, inversion) on some data set sets that range from 5-50 GB.? I looked around on the web, including the CRAN HPC, to see what was available. A couple of things came up, pbdr (http://r-pbd.org/) and HIPLAR (http://hiplar.org/hiplar-b.html).? Which of these is the best for my application?? It's not even clear HIPLAR will work in a Windows environment.? If I go the HIPLAR route, which of the two programs, HIPLARb or HIPLARM, is preferable?? It's not clear to me the difference in the two programs.? My matrices have a lot of zeros, but the HIPLAR software requires PLASMA/MAGMA which seems to only work with dense matrices.? Can someone help me sort this out?
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A related question concerns the availability of an R package to perform stepwise logistic regression (yes, I know this is an unpardonable sin-I'm replicating someone else's analysis) in a parallel environment.? I believe this has been implemented in Revolution R, but I'm not sure if anywhere else.? Any guidance appreciated.