tiny typo in optim/N-M documentation (PR#1109)
Hi Ben,
bolker@zoo.ufl.edu wrote:
While I'm at it -- poking at the code a little bit, it looks as if the initial simplex is set from the initial point by displacing each parameter value by max(0.1,0.1*pmax(fabs(Bvec))), where Bvec is the initial parameter set. It would be nice to have a bit more external control of this procedure. Is anyone interested in hacking this? If I did it myself would anyone be interested in the results? Or does fussing with the Nelder-Mead simplex seem silly because anyone who is really serious about optimization will being using another method anyway?
I am a happy (but serious) user of simplex optimisation in "optim". I think that it would be a very good idea to be able to over-ride the default initial simplex through an argument to the "control" list. So if you do the hack please publish it, and if not, let me know and I will have a go instead. Cheers, Jonathan.
Jonathan Rougier Science Laboratories Department of Mathematical Sciences South Road University of Durham Durham DH1 3LE tel: +44 (0)191 374 2361, fax: +44 (0)191 374 7388 http://www.maths.dur.ac.uk/stats/people/jcr/jcr.html -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._