Re: eigenvectors is taking lot of time
- To: mathgroup at smc.vnet.net
- Subject: [mg82622] Re: eigenvectors is taking lot of time
- From: "Steve Luttrell" <steve at _removemefirst_luttrell.org.uk>
- Date: Fri, 26 Oct 2007 05:25:29 -0400 (EDT)
- References: <ffppmk$l0d$1@smc.vnet.net>
Does your matrix have symbolic or exact-valued elements? If so, then this would lead to very large expressions for a 30x30 matrix, especially if the matrix elements are symbolic. Try starting with a 2x2 matrix, and gradually working up in matrix size, to see what I mean. -- Steve Luttrell West Malvern, UK <vickyisai at gmail.com> wrote in message news:ffppmk$l0d$1 at smc.vnet.net... > Hi all > > I am trying to calculate eigenvectors of a 30 X 30 matrix. and > mathematica is still just "running". > Is the any way to get the eigenvectors quickly. > > After 45 mins ,it was still running and displayed a message "limit of > "some number here(4096) exceeded" > > i wanted eigen values and vectors both ..so i tried eigensystem....but > tat also took long, so i switched to individualfunctions of > eigenvalues and eigenvectors. > > I aborted it...shud i execute it again and wait for longer? > I use Mathematica 5.2 and got a AMD Turion 2.2 Gz, does tat matter for > a 30 x 30 matrix?? > > Thanks > > Vick Al Aisa > >