[R] multivariate splines

[Tamas K Papp]

Hi,

I am looking for an R package that would calculate multivarite (mostly
2d and 3d, tensor) cubic interpolating splines, so that I could
evaluate these splines (and their derivatives) at many points (unkown
at the time of calculating the spline polynomials) repeatedly.

To make things concrete, I have an array V with

dim(V) = k

and gridpoint vectors grid=list(...), length(grid[[i]])==k[i], and
would like to get some representation of the spline convenient for
subsequent calculations.

I have looked at a few spline packages in R, but didn't find what I
was looking for.  Could somebody please point me in the right
direction?

Thanks,

Tamas