On Apr 1, 2013 1:10 AM, "qi A" <send2...@gmail.com> wrote: > > Hi, All > > SAS has DUD (Does not Use Derivatives)/Secant Method for nonlinear > regression, does R offer this option for nonlinear regression? > > I have read the helpfile for nls() and could not find such option, any > suggestion? >
nelder-mead is default algorithm in optim. It does not use derivatives. dud is from same generation, but John Nash recommended N-M method. Pj > Thanks, > > Derek > > [[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. [[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.
