[R] eigen vector sign reversal

Thomas Lumley tlumley at u.washington.edu
Wed Jul 16 16:41:12 CEST 2003

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.

Yes, but as the sign of eigenvectors is not well-defined it may be better
to fix the scripts so that they don't care.


Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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