I can confirm that AD Model Builder is used at the Danish Institute for Fisheries Research, and by fisheries people in and all around the Pacific.
On a few occasions I have solved a likelihood optimization problem in AD Model Builder, and then wrapped the binary in an R-package, with data read in, graphics and such, for others to use, as the binaries can be freely distributed. I can recommend this approach to anyone with problems where 'optim' is struggling. I would love to see AD in R, but I think it would be difficult to combine many of the things that makes R so wonderful and flexible to work with, like logical indexing, with AD, but I could be wrong. Anders. On Thursday 26 January 2006 05:55 am, Hans Skaug wrote: > Dear Alberto, > > There are fisheries people also in Europe using AD Model Builder > (Denmark and England for instance), but you are probably right that > it is more widespread in North America. There is also effort going > on where people try to make assessment models written in ADMB > callable from R. > > best regards, > > hans > > > think AD Model Builder is mainly used for fisheries assessment in > > North America and, it seems, also in Australia. In Europe, R is > > still the de-facto standard for fisheries assessment. However, > > I'd like to support Bill Venables' suggestion. I've been > > resisting to adopt AD model builder, or to start using again that > > other system not unlike R, mainly because of the licence price > > and because I really like R as a tool for almost everything. But > > an AD function would really make a huge difference for my work. > > There are free tools that can be used to perform AD on C or > > Fortran code (e.g. http://www.autodiff.org). One of the > > difficulties to use them with R is the need to translate the R > > code into C of Fortran code, but probably there are many other > > problems that I'm not able to see. > > > >Alberto > >-- > > _____________________________ > Hans Julius Skaug > > Department of Mathematics > University of Bergen > Johannes Brunsgate 12 > 5008 Bergen > Norway > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html