> On Dec 18, 2015, at 7:42 AM, <francesca.manc...@ubs.com> > <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?
I have pleasing experience with the `rcs` function from package 'rms'. One can build such multidimensional splines with the formula interface using the "*" crossing-operator. It is limited to only piecewise cubic splines. You can specify the knots or let them be optimized by the regression function. It's effective use does require that you learn the requirements of the surrounding helper functions and data description methods supplied by the rms/Hmisc packages. -- David > David Winsemius Alameda, CA, USA ______________________________________________ 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.
