[R] Gradient function for optim.

[rkevinburton at charter.net]

Thank you. I saw the source. But I am not sure how to get from .Internal(optim(...)) to fmingr.

Kevin

---- Katharine Mullen <kate at few.vu.nl> wrote: 
> 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 rkevinburton at 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 at 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.
> >