[R] bivariate function in gam model

[Prof Brian D Ripley]

On Wed, 16 May 2001 ben at zoo.ufl.edu wrote:

>
>   I don't know, but would the thin-plate splines in the funfit library do
> what you need?

I had a lot of problems with using those in funfit (and its legal status is
unclear).  I think gss is more promising: its gssanova includes bivariate
terms in additive predictors for a GLM, including thin-plate spline terms.

> On Wed, 16 May 2001, Daniel A. Powers wrote:
>
> >
> > R-users --
> >
> > I would be interested in tools in R to fit the following gam model:
> >
> > logit(p) = a + f(x1) + f(x2) + f(x1,x2),
> >
> > where f(x1,x2) defines a surface.

[...]

-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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