Don't know if this helps, but...
gam in package mgcv will let you set up smooths that interact with factors
using the `by' variable mechanism. See ?gam.models, particularly the last
example. Prediction is supported.
Simon
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> Simon Wood, Mathematical Sciences, University of Bath, Bath, BA2 7
Dear R-users,
I have 1 remark and 1 question on the inclusion of interactions in the gam
function from the gam package.
I need to fit quantitative predictors in interactions with factors. You can see
an example of what I need in fig 9.13 p265 from Hastie and Tibshirani book
(1990).
It's clea
