[R] tree/rpart

Josef Vogt vogt at stat.math.ethz.ch
Fri Jan 14 15:47:49 CET 2000

I try to implement the boosting algorithm from Schapire/Freund.

As weak learners I want to use trees with only two (stumps)  or four
terminal nodes. I tried in R with the package rpart and tree. With the
package tree I got some troubles with weights in a classification tree. And
with the rpart command I dont know how to produce a stump or a tree with a
certain number of terminal nodes.

My question: How can I produce with the command rpart such a tree, if the
tree sould be grown "best-first" without pruning, always using weights.


josef vogt
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