[R] R & gams

[vittorio]

At office I have been introduced by another company  to new, complex energy 
forecasting models using gams as the basic software.
I have been told by the company offering the models that gams is specialised 
in dealing with huge, hevy-weight linear and non-linear modelling (see an 
example in http://www.gams.com/modtype/index.htm) and they say it is almost 
the only option for doing it.

I would like to know your opinion on the subject and, above all, if R can be 
an effective alternative and to what extent, if any.

Thanks
Vittorio