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 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
