>From a reading of `?ti`
It is sometimes useful to investigate smooth models with a
main-effects + interactions structure, for example
f_1(x) + f_2(z) + f_3(x,z)
This functional ANOVA decomposition is supported by ‘ti’ terms,
which produce tensor pro
Hi,
I am trying to fit a smoothing model where there are three dimensions
over which I can smooth (x,y,z). I expect interactions between some,
or all, of these terms, and so I have set up my model as
mdl <- gam(PA ~ s(x) + s(y) + s(z) + te(x,y) + te(x,z) + te(y,z) +
te(x,y,z),...)
I have recentl
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