Is there a question or point to your message or did you simply feel the urge to inform the entire R-help list of the things that you consider?
Josh On Fri, Sep 30, 2011 at 11:12 PM, yehengxin <xy...@hotmail.com> wrote: > I used to consider using R and "Optim" to replace my commercial packages: > Gauss and Matlab. But it turns out that "Optim" does not converge > completely. The same data for Gauss and Matlab are converged very well. I > see that there are too many packages based on "optim" and really doubt if > they can be trusted! > > -- > View this message in context: > http://r.789695.n4.nabble.com/Poor-performance-of-Optim-tp3862229p3862229.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. -- Joshua Wiley Ph.D. Student, Health Psychology Programmer Analyst II, ATS Statistical Consulting Group University of California, Los Angeles https://joshuawiley.com/ ______________________________________________ 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.