From chemistry-request[ AT ]ccl.net Mon May 2 18:33:07 2005 Received: from f05n15.cac.psu.edu (phpdb.aset.psu.edu [128.118.141.100]) by server.ccl.net (8.13.1/8.13.1) with ESMTP id j42MX02Y024729 for < ccl.net>; Mon, 2 May 2005 18:33:00 -0400 Received: from 192.168.1.101 (69-162-2-232.stcgpa.adelphia.net [69.162.2.232]) by f05n15.cac.psu.edu (8.13.2/8.13.2) with ESMTP id j42MWwAO122672; Mon, 2 May 2005 18:32:58 -0400 Subject: Re: CCL:eigenvalues & eigenvectors From: Rajarshi Guha < psu.edu> Reply-To: rxg218 >< psu.edu To: David J Anick < rcn.com> Cc: chemistry >< ccl.net In-Reply-To: <001201c54f43$c696c560$25d806d1 >< cable.rcn.com> References: <001201c54f43$c696c560$25d806d1 >< cable.rcn.com> Content-Type: text/plain Date: Mon, 02 May 2005 18:32:52 -0400 Message-Id: <1115073172.5425.3.camel >< localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new X-Spam-Status: No, score=0.6 required=5.0 tests=FORGED_RCVD_HELO, FROM_ENDS_IN_NUMS autolearn=no version=3.0.3 X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on server.ccl.net On Mon, 2005-05-02 at 14:21 -0400, David J Anick wrote: > Dear CCL, > > Does anyone have or know of freeware that can > compute the eigenvalues and eigenvectors of a > real symmetric matrix (e.g a Hessian, but not > necessarily a Hessian)? I'd be content to run > under either Windows or Linux. If you're looking for a library, GSL (http://sources.redhat.com/gsl/) will do it. You can also use Python to do it via NumPy (http://numeric.scipy.org/ ) You could also use general math/stat programs such as Octave http://www.octave.org/ or R http://lib.stat.cmu.edu/R/CRAN/ HTH, ------------------------------------------------------------------- Rajarshi Guha < psu.edu> GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE ------------------------------------------------------------------- Eureka! -- Archimedes