Have you considered thin plate splines, which are a natural extension of one-dimensional splines to higher dimensional spaces, but are not piecewise polynomials? The Tps function in the fields package will fit a thin plate spline to irregularly spaced data.
Bill Dunlap TIBCO Software wdunlap tibco.com On Fri, Dec 18, 2015 at 7:42 AM, <francesca.manc...@ubs.com> wrote: > Dear all, > > I am looking for a package which performs splining in more than one > dimension with polynomials of order>1, exactly as the package "splines" > does in 1D. > For the moment I was only able to find the package "polspline", whose > function "polymars" performs just piecewise linear splines, so not exactly > what I'm looking for. > Do you know of anything else? > > Thanks a lot! > > Check out our new brand campaign: www.ubs.com/together > > Visit our website at http://www.ubs.com > > This message contains confidential information and is ...{{dropped:13}} ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.