[R] GAMS and Knots

[Gavin Simpson]

On Wed, 2006-11-29 at 11:40 +1300, Kathryn Baldwin wrote:
> Hi
> I was wondering if anyone knew how to work out the number of knots that 
> should be applied to each variable when using gams in the mgcv library?
> Any help or references would be much appreciated.
> Thanks
> Kathryn Baldwin

mgcv works out an optimal number of knots to use, using a Generalised
Cross-Validation (GCV) routine. Take a look at:

Simon N. Wood. mgcv: GAMs and generalized ridge regression for R. R
News, 1(2):20-25, June 2001.

And Simon's new book:

Simon N. Wood. Generalized Additive Models: An Introduction with R.
Chapman & Hall/CRC, Boca Raton, FL, 2006. ISBN 1-584-88474-6.

For further info on using mgcv for GAMs.

HTH

G

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