Hello,
I need to summarize a three-dimensional dataset through a principal surface
that passes through the middle of the data. Principal surfaces are non-linear
generalization of the plane created by the first two principal components and
provide a non-linear summary of p-dimensional dataset. Principal surfaces are
described in this 1989 article by Hastie and Stuetzle:
https://web.stanford.edu/~hastie/Papers/Principal_Curves.pdf . They were
introduced by Trevor Hastie in his Ph.D dissertation:
http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-r-276.pdf
I'm looking for a package to fit principal surfaces with R.
I've come across the package princurve created by TrevorHastie, but it allows
to fit principal curves only. How can I fit two-dimensional principal surfaces
in R?
Thank you.
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