Which other Linear Algebra system, and which function did you use in R? Cheers Joris
On Thu, Jun 24, 2010 at 12:32 AM, <rkevinbur...@charter.net> wrote: > Forgive me if I missunderstand a basic Eigensystem but when I present the > following matrix to most any other LinearAlgebra system: > > 1 3 1 > 1 2 2 > 1 1 3 > > I get an answer like: > > //$values > //[1] 5.000000e+00 1.000000e+00 -5.536207e-16 > > //$vectors > // [,1] [,2] [,3] > //[1,] 0.5773503 -0.8451543 -0.9428090 > //[2,] 0.5773503 -0.1690309 0.2357023 > //[3,] 0.5773503 0.5070926 0.2357023 > > But R gives me: > > //$values > //[1] 5.000000e+00 1.000000e+00 -5.536207e-16 > > //$vectors > // [,1] [,2] [,3] > //[1,] -0.5773503 -0.8451543 -0.9428090 > //[2,] -0.5773503 -0.1690309 0.2357023 > //[3,] -0.5773503 0.5070926 0.2357023 > > The only difference seems to be the sign on the first eigen vector. What am I > missing? > > Kevin > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Joris Meys Statistical consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control tel : +32 9 264 59 87 joris.m...@ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.