From nashjc at uottawa.ca  Tue Nov 16 21:35:03 2010
From: nashjc at uottawa.ca (Prof. John C Nash)
Date: Tue, 16 Nov 2010 15:35:03 -0500
Subject: [Rd] DBLEPR?
Message-ID: <4CE2EAF7.5020202@uottawa.ca>

I normally see digest once per day, but got msg from Doug Bates so responding with context.

UCMINF is a package on CRAN that implements a variable metric minimizer. It does quite
well on unconstrained problems. Stig Mortensen packaged the Fortran version for R, but is
not at moment responding to emails. There's also a Matlab version. We have it in optimx
and get some occasions where it just stops if we set trace>0. Other times we can't get it
to fail. My guess is something like an undefined variable or a bad declaration of a
pointer, but C and C++ are not languages I've much experience with.

JN



[Rd] DBLEPR?
Prof. John C Nash