There's a periodic cubic spline smoother built into package mgcv's gam
function (although it happens not to use a B-spline basis). This can be
used in tensor product smooth surfaces. e.g.
gam(y~te(x,z,bs=c("cc","cc")))
best,
Simon
> Hi..,
>
> is there any funcrion in R to fit a periodic B-spline Surface
>
> Harsh
>
>
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