On Tue, 15 Jul 2003, Roger D. Peng wrote: > I think at version 1.7.0 R started using LAPACK for its eigen/svd > routines. I think using `eigen(x, EISPACK = TRUE)' uses the previous > version.
That is true, but using different compilers on the same machine and the same version of R may give different signs for the eigenvectors. The moral is, don't rely on the signs of eigenvectors! (This *is* on the help page.) > 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. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help