Hi Abby: Either way, thanks for your efforts with the derivative plot. Note that John Nash is a SERIOUS EXPERT in optimization so I would just go by what he said earlier. Also, I don't want to speak for Duncan but I have a feeling that he meant "inadequacy" in the CG method rather than a bug in the R code.
Mark On Thu, Mar 12, 2020 at 5:55 PM Abby Spurdle <spurdl...@gmail.com> wrote: > > (1) An exact solution can be derived quickly > > Please disregard note (1) above. > I'm not sure if it was right. > > And one more comment: > > The conjugate gradient method is an established method. > So the question is, is the optim function applying this method or not... > And assuming that it is, then R is definitely doing what it should be > doing. > If not, then I guess it would be a bug... > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
