Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uwm.edu!psuvax1!ukma!dftsrv!mimsy!umiacs.umd.edu!curtiss From: curtiss@umiacs.umd.edu (Phil J. Curtiss) Newsgroups: bionet.biology.computational Subject: (none) Message-ID: <33545@mimsy.umd.edu> Date: 25 Apr 91 17:39:04 GMT Sender: news@mimsy.umd.edu Reply-To: "Pierre Gagnon" Distribution: bionet Organization: University of Maryland Institute for Advanced Computer Studies Lines: 20 Approved: comp-bio-moderator@genbank.bio.net HELP! I am looking for a good subroutine library to do constrained and unconstrained non-linear optimisation. I already use the IMSL library on our VAX under VMS but I find that the routines operate poorly: they often take too many iterations to converge and sometimes they stall or simply don't converge. I can solve the same problems with the NLIN procedure in SAS with far less iterations but I have a very large number of such problems to solve and SAS would simply not be practical. Pierre Gagnon Institut Maurice-Lamontagne P.O. Box 1000 Mont-Joli (Quebec) CANADA G5H 3Z4 -- Domain: curtiss@umiacs.umd.edu Phillip Curtiss UUCP: uunet!mimsy!curtiss UMIACS - Univ. of Maryland Phone: +1-301-405-6710 College Park, Md 20742