Re: eigenvector rotation
- To: mathgroup at smc.vnet.net
- Subject: [mg46669] Re: eigenvector rotation
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 27 Feb 2004 19:31:58 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <c1luu7$o16$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, since Mathematica use the EISPACK routines you have to write your own code to find the eigensystem and you can't use any library because all numerical librarys use EISPACK And I would expect that the effect comes form the Householder rotation during the eigensystem computation. Regards Jens Bettina wrote: > > Hi > It seems, that when I calculate the eigensystem of a complex Hermitian > matrix, th eigenvectors get rotated automatically in such a way, that > the highest absolute valued eigenvector component becomes real. Since I > need the unrotated result, how do I switch off this feature? > Thanks for the help. > Best regards > Bettina