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2012 Dec 12
3
R-2.15.2 changes in computation speed. Numerical precision?
...review my
notes in http://pj.freefaculty.org/scraps/profile/qrginv.R).
So I asked WIndows users for more detailed feedback, including
sessionInfo(), and I noticed that my proposed algorithm is not faster
on Windows--WITH OLD R!
Here's the script output with R-2.15.0, shows no speedup from the
KPginv algorithm
http://pj.freefaculty.org/scraps/profile/prof-puzzle-1-Windows.Rout
On the same machine, I updated to R-2.15.2, and we see the same
speedup from the KPginv algorithm
http://pj.freefaculty.org/scraps/profile/prof-puzzle-1-CRMDA02-WinR2.15.2.Rout
After that, I realized it is an R versio...