From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,67d995bf9f62ea45 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news4.google.com!feeder.news-service.com!newsfeed.straub-nv.de!open-news-network.org!eternal-september.org!.POSTED!not-for-mail From: Simon Wright Newsgroups: comp.lang.ada Subject: Re: matrix package with Ada Date: Wed, 14 Jul 2010 19:55:55 +0100 Organization: A noiseless patient Spider Message-ID: References: <23f0d8f1-e7bd-4af9-a0ee-cea85cbff4bd@x21g2000yqa.googlegroups.com> <8f4ba975-5441-4b42-89ad-b53373a59eb9@g19g2000yqc.googlegroups.com> <53250ca8-da19-47a9-a9b1-3cd1653fb05f@y4g2000yqy.googlegroups.com> <88726737-eede-4e30-a7c3-9e9157fec992@c33g2000yqm.googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Date: Wed, 14 Jul 2010 18:55:54 +0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="KCXegvZb5vh43D+f3BR6Ew"; logging-data="7798"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19N/lxJHRetWHiE84Edl/fa1z68YM0Q/4Q=" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (darwin) Cancel-Lock: sha1:UmDGwEqhJ+DdUY0QiOgSOPyTDp0= sha1:EBwP5hLwJCRBlyH/FjH327YJ4zk= Xref: g2news1.google.com comp.lang.ada:12426 Date: 2010-07-14T19:55:55+01:00 List-Id: Ada novice writes: >> >> I found that not all of the numbers were different. Some of the >> differences were very small. Sometimes vectors were given in the >> opposite order (there's a note in the AI about that not being a >> problem). > > The eigenvalues are not given in an ascending order. Different > software implementations use different ways to present the eigenvalues > and eigenvectors (normalizations for the latter). But nominally these are the same software implementation. Still, the .dat file is dated 31 Oct 1999, the .out file 26 May 2006, so the implementation may well have changed in this respect.