see the fmingr function in src/main/optim.c (https://svn.r-project.org/R/trunk/src/main/optim.c)
On Wed, 25 Feb 2009 rkevinbur...@charter.net wrote: > I have read that when the gradient function is not supplied (is null) > then first order differencing is used to find the differential. I was > trying to track down this for my own information but I run into > .Internal(optim.....). I was not sure where to look next to see the > function that is automatically supplied for the gradient. > > Thank you. > > Kevin > > ______________________________________________ > 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. > ______________________________________________ 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.