[R] Re: help: how to do cost-complexity pruning in CART
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Oct 18 16:44:50 CEST 2000
> From: Pan_Yuming at aam.de
> To: Prof Brian Ripley <ripley at stats.ox.ac.uk>
> Cc: r-help at hypatia.math.ethz.ch
> Date: Wed, 18 Oct 2000 16:12:35 +0200
> Dear professor,
> I want to produce an optimally pruned tree for cost-complexty using "1 SE"
> rule proposed by Breiman. I could not figure out how to implement this
> automatically in your CART package. Would you pls advice?
CART is the registered trademark of a commercial package not written by
me and is nothing to do with R.
If you meant something other than CART, such as the rpart or tree R
packages, please do not approach individual authors of R packages for
technical support *and* Cc: r-help. Package authors have not agreed
to provide free technical support, and especially not to someone who
gives no affiliation. Enquiries to R-help are likely to produce a
response from the expert, but only if they are carefully formulated and
are not already answered in the documentation.
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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