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ergin
2012 Dec 12
3
R-2.15.2 changes in computation speed. Numerical precision?
...es the profile of the calculations that depend on the
ordinary generalized inverse algorithm based on svd and the new one.
See? The KP algorithm is faster. And just as accurate as
Amelia:::mpinv or MASS::ginv (for details on that, please 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-pu...