[R] tree and rpart (=> prune.rpart)

Prof Brian D Ripley ripley at stats.ox.ac.uk
Thu Jul 26 18:31:18 CEST 2001

On Thu, 26 Jul 2001 White.Denis at epamail.epa.gov wrote:

> > rpart
> > =====
> >
> > Since rpart 2.x, rpart could do all that tree could do, faster.  We
> > are now on rpart 3.x, which added user-specified splits and
> > NA-handling.  At some point fairly soon rpart is expected to ship as
> > part of S-PLUS and the interface will be frozen, but that means that
> > Terry Therneau has made lots of undocumented changes that some of you
> > have been finding.
> [...]
> In case prune.rpart did not get modified to add the "best=" parameter for
> pruning to a fixed size, there is a prune.Rpart in contributed package
> maptree with that feature.

Did you submit that suggestion to the authors (Therneau and Atkinson)?
rpart is a port of an S package, and is only useful to me (the porter) if
it remains almost exactly the same on the both systems.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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