[R] rpart leaves
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Sun May 26 08:56:53 CEST 2002
On Sun, 26 May 2002, Ko-Kang Kevin Wang wrote:
> Is it possible to manually specify how many leaves I want for a tree
> fitted by rpart(), or tree()?
Up to a point. You can prune a tree to any member of the cost-complexity
sequence, but there need not be one of the given size. prune.tree
allows one to specify a target size, and as I recall it package maptree has
Prune.rpart which is similar for rpart. Check their help pages for exactly
what they do if the target size is not in the cost-complexity sequence.
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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