[R] multivariate splits
gavin.simpson at ucl.ac.uk
Tue Jun 20 19:36:05 CEST 2006
On Tue, 2006-06-20 at 08:12 -0700, Scott Rollins wrote:
> Glenn De'ath published a paper in 'Ecology' several years ago and
> included S-Plus functions in the archives. I haven't looked at the
> files, so I'm not sure what modifications would be necessary for R.
> De'ath, G. 2002. Multivariate regression trees: a new technique for
> modeling species--environment relationships. Ecology 83:1105-1117.
> Archives: http://www.esapubs.org/archive/ecol/E083/017/
Glenn's code is in package mvpart on CRAN.
Not sure if the OP wanted this or not, but the multivariate nature of
mvpart is in allowing multivariate responses, common in ecological data
analysis. The fitting is still done using rpart (actually a modified
version of rpart to allow for the multivariate response).
> > Date: Mon, 19 Jun 2006 16:17:40 +0200
> > From: " B?lint Cz?cz " <elatine at gmail.com>
> > Subject: [R] multivariate splits
> > To: r-help <r-help at stat.math.ethz.ch>
> > Message-ID: <fab4bcf70606190717r45a2030dg at mail.gmail.com>
> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> > Dear R users!
> > Does someone know about any algorithms / packages in R, that perform
> > classification / regression / decision trees using multivariate
> > splits?
> > I have done some research, but I found nothing. Packages "tree" and
> > "rpart" seem only to be able to do CART with univariate splits.
> > Thank you for your help!
> > B?lint
> > --
> > Cz?cz B?lint
> > PhD hallgat?
> > BCE KTK Talajtan ?s V?zgazd?lkod?s Tansz?k
> > 1118 Budapest, Vill?nyi ?t 29-43.
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