R help - Aug 2004 - Neural Net Validation Sub Set

Dear R users,
I have been playing with the nnet and predict.nnet functions and have two
questions.

1) Is it possible to specify a validation set as well as a training set in the
nnet
function before using predict.nnet to test the nnet object against new data?

2) Is it possible to specify more than one layer of neurons?

Thanks in advance

Matt Oliver

On Sun, 1 Aug 2004, Matthew Oliver wrote:
> Dear R users,
> I have been playing with the nnet and predict.nnet functions and have two
questions.
> 
> 1) Is it possible to specify a validation set as well as a training set
> in the nnet function before using predict.nnet to test the nnet object
> against new data?
No, as nnet just trains.  What would the validation set be for?  
(Validation is testing a fitted model against new data.)
> 2) Is it possible to specify more than one layer of neurons?
Yes.  nnet is a wrapper for other functions, and see how it constructs a 
net -- the construction is general.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595