[R] how to personalize split function in rpart
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon Jul 5 22:34:23 CEST 2004
Have you looked at the package sources? Do read rpart/tests/usersplits.R.
On Mon, 5 Jul 2004, Simone Vantini wrote:
> I am a student of the Politecnico di Milano (Milan, italy) and I'm working
> on CARTs. I'm trying to use the R rpart function with a personalized splitfunction... but I'm not able to do it!
> More precisely, I would like to know what is the meaning of the function
> 'init', 'split' and 'eval' named in the help page.I can't find any answer
> in 'Classification and regression trees' (Breiman, ...) , in 'Modern
> applied statistics with S-plus' (Venables, Ripley) or even in the on-line
> forum.Thank You very much
Those are not about rpart. See the S original at
for some further details (in rpart/Manuscript/AddMethods, about adding
C-level split functions).
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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