>>>>> "Roger" == Roger D Peng <[EMAIL PROTECTED]> >>>>> on Tue, 15 Jul 2003 10:19:38 -0700 writes:
Roger> I think at version 1.7.0 R started using LAPACK for Roger> its eigen/svd routines. I think using `eigen(x, Roger> EISPACK = TRUE)' uses the previous version. Yes (2 x). But it the eigen vectors *are* determined only upto multiplication with +/- 1. So I think Karim should consider improving the R scripts that have been dependent on particular signs of the eigen vectors. Roger> Karim Elsawy wrote: >> I've just installed R 1.7.1 under linux red hat I noticed >> sign reversal of eigen vectors ,some of them not all, >> upon using diag function relative to those obtained using >> R 1.4.1 this is gonna miss up lots of my previous scripts >> I wonder if there is a way to avoid this. best regards >> karim Martin Maechler <[EMAIL PROTECTED]> http://stat.ethz.ch/~maechler/ Seminar fuer Statistik, ETH-Zentrum LEO C16 Leonhardstr. 27 ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND phone: x-41-1-632-3408 fax: ...-1228 <>< ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help