[R] Where is gam?

[Anantha Prasad/NE/USDAFS]

Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:

> One reason that gam is not there is that some of us think it
> is much over-sold as a technique and the way it is done in S is poorly
> implemented.
Could you please clarify.... there has been a lot of interest in gam
recently in predicting species distribution and environmental management
(there is in fact a workshop scheduled in Switzerland next year on GLM/GAM
modelling). So many of us would be very interested to learn about its
shortcomings (reason why you think it is oversold technique)...and also
what aspects of it are poorly implemented in S.
If you shed some light on this, it will be of great help to us.
Thanks much.
Prasad
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Mr. Anantha Prasad, Ecologist/GIS Specialist
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                    Peter Dalgaard                                                     
                    BSA                     To:     r-help at stat.math.ethz.ch,          
                    <p.dalgaard at bios        aprasad at fs.fed.us                          
                    tat.ku.dk>              cc:                                        
                    Sent by:                Subject:     Re: [R] Where is gam?         
                    pd at blueberry.kub                                                   
                    ism.ku.dk                                                          
                                                                                       
                                                                                       
                    10/03/00 10:20                                                     
                    AM                                                                 
                                                                                       
                                                                                       



Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:

> > I noticed that there is no generalised additive model functions in R
> > (1.1.1)  ... is there a package that implements them?
..

> If you just want additive models there is a much better
> function bruto in package MDA.
>
> One reason that gam is not there is that some of us think it
> is much over-sold as a technique and the way it is done in S is poorly
> implemented.

Also, note that the gss package by Chong Gu has much the same
objective as gam().

--
   O__  ---- Peter Dalgaard             Blegdamsvej 3
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907




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