From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22012 invoked by alias); 27 Mar 2008 11:06:38 -0000 Received: (qmail 22002 invoked by uid 22791); 27 Mar 2008 11:06:38 -0000 X-Spam-Check-By: sourceware.org Received: from mail.network-theory.co.uk (HELO mail.network-theory.co.uk) (66.199.228.187) by sourceware.org (qpsmtpd/0.31) with ESMTP; Thu, 27 Mar 2008 11:06:15 +0000 Date: Thu, 27 Mar 2008 11:06:00 -0000 Message-ID: From: Brian Gough To: picca Cc: gsl-discuss@sourceware.org Subject: Re: nmsimplex iteration. In-Reply-To: <20080317144641.332eb83a@synchrotron-soleil.Fr> References: <20080317144641.332eb83a@synchrotron-soleil.Fr> User-Agent: Wanderlust/2.14.0 (Africa) Emacs/21.3 Mule/5.0 (SAKAKI) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII X-Message-Mac: 71aaa633ef326d85cb0433aa848fe41e Mailing-List: contact gsl-discuss-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gsl-discuss-owner@sourceware.org X-SW-Source: 2008-q1/txt/msg00044.txt.bz2 At Mon, 17 Mar 2008 14:46:41 +0100, picca wrote: > To achieve this, we must contraction the simplex till it becomes valid. > Is it possible to tune the simplex algorithm to solve also those > locally convex problems. I don't know but if you find a way I can add a patch for it. > Another problem is that the initial guest of the simplex is not always > possible. Can I create by myself the starting points of the simplex ? The starting points are xi = x0+step_i e_i so it should be possible to set them all to known values using the step_size vector argument of gsl_multimin_fsolver_set. -- Brian Gough