[R] bivariate function in gam model

Daniel A. Powers dpowers at mail.la.utexas.edu
Wed May 16 18:24:16 CEST 2001

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.

I have looked into the mgcv library, but it seems only to fit models of
the form:

logit(p) = a + f(x1) + f(x2)

Any ideas?


Dan Powers
Associate Professor, Sociology
University of Texas at Austin

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