[R] Polymars

[Martin Maechler]

>>>>> "DavidB" == Brown, David <djbrown at montana.edu>
>>>>>     on Fri, 27 Sep 2002 10:33:33 -0600 writes:

    DavidB> I've seen references to "polymars", an R
    DavidB> implementation of Friedman's MARS algorithm.  Can
    DavidB> anyone tell me where I might be able to find this
    DavidB> (doesn't seem to be in the contributed packages.

not visibly anymore, but in "Archive" of old packages, i.e., in
the States,
  http://cran.US.r-project.org/src/contrib/Archive/  -> polymars_1.0-5.tar.gz

Its DESCRIPTION says

 >> Package: polymars
 >> Version: 1.0-5
 >> Title: Polychotomous Regression based on MARS
 >> Author: Charles Kooperberg and Martin O'Connor 
 >>         R port by Guido Masarotto <guido at sirio.stat.unipd.it>
 >> Maintainer: Guido Masarotto <guido at sirio.stat.unipd.it>
 >> Description: (polychotomous) regression based on 
 >>              Multivariate Adaptive Regression Splines
 >> License: Free for non-commercial purposes. See the original README.

As far as I remember (from heresay of the CRAN maintainers),
there have been at least two problems which made it disappear from
"official" CRAN:

  - The "Maintainer" did not continue to maintain it when it
    became evident the package needed some fixes to pass "R CMD check"
  - The "License" made it no so much useful anyway such as to
    try to find another maintainer.

The good news is that Charles Kooperberg recently told me about
his plans of providing improved code and maintaining it himself
in the future. 

If Charles (the owner of the code) changes the licence to GPL,
I'd volunteer to spend a few hours on the package to have it
pass "R .. check" to be back on CRAN till Charles' new code will
appear.

Martin Maechler <maechler at stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><
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