Dear Dr. Vardhan, From where can we download this package and its details.
Thanks HAve a nice day. On Wed, 23 Apr 2008 16:39:50 -0400 "Ravi Varadhan" wrote: > Hi, > > > > We (Paul Gilbert and I) have just released a new R package on CRAN called > "BB" (stands for Barzilai-Borwein) that provides functionality for solving > large-scale (and small-scale) nonlinear system of equations. Until now, R > didn't have any functionality for solving nonlinear systems. We hope that > this package fills that need. > > > > We also have an implementation of the spectral projected gradient method for > the optimization of (smooth) nonlinear objective functions, subject to > simple constraints that can be defined as a projection mapping. This > function, spg(), is suited for large-s! cale optimization. It generally > performs better than the conjugate-gradient methods in "optim", and > complements the "low-memory BFGS" method for constraints that can be defined > by the user as projection mapping. > > > > Best regards, > > Ravi. > > ---------------------------------------------------------------------------- > ------- > > Ravi Varadhan, Ph.D. > > Assistant Professor, The Center on Aging and Health > > Division of Geriatric Medicine and Gerontology > > Johns Hopkins University > > Ph: (410) 502-2619 > > Fax: (410) 614-9625 > > Email: [EMAIL PROTECTED] > > Webpage: http://www.jhsph.edu/agingandhealth/People/Faculty/Varadhan.html > > > > ---------------! ------------------------------------------------------------- &g t; -------- > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > [email protected] 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. ______________________________________________ [email protected] 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.
