Slight correction:
On Thu, Sep 5, 2013 at 7:48 AM, Bert Gunter <bgun...@gene.com> wrote: > Michael: > > Your parameter specification is probably over-determined, so that you have > an infinite set of parameter **values** that give essentially the same > solution within numerical error. I would venture to guess that this will > not be fixable with alternative optimizers. It is up to you to provide a > sensible problem specification; failure to do so cannot be blamed on the > optimizer. > > Cheers, > Bert > > > On Thu, Sep 5, 2013 at 3:23 AM, Michael Meyer <spyqqq...@yahoo.com> wrote: > >> Thanks for all replies. >> The problem occurred in the following context: >> >> A Gaussian one dimensional mixture (number of constituents, locations, >> variances all unknown) >> is to be fitted to data (as starting value to or in lieu of mixtools). A >> likelihood maximization is performed. >> >> I'll try to destill the code so that reproducible failure of L-BFGS-B >> occurs >> and post it here. >> >> >> >> Michael Meyer >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm > > -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
