On Thu, 2006-11-23 at 09:39 +0000, Wee-Jin Goh wrote: > Hello, > > Thanks for that. I've taken a look at the source code, and I see that > the bulk of the processing is done in C, with R acting as a wrapper. > Below is the function I think is doing the training in the network. > > I'm guessing it's the standard Backpropagation with a decay term > algorithm? Can anyone confirm if that's correct? > > Cheers, > Wee-Jin
How about you take a look at Section 8.10 in MASS (the book; Venables & Ripley (2002) Modern Applied Statistics in S 4th Edition, Springer.) and Brian Ripley's 1996 book Pattern Recognition and Neural Networks, Cambridge University Press. Both of which are documented in the help page for nnet; see ?nnet. nnet (the package) is support software for these books so you should consult these references. nnet is a package within the VR bundle by the way. G -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Gavin Simpson [t] +44 (0)20 7679 0522 ECRC & ENSIS, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.