Re: [R] using bootstrap for tree selection step in rpart

2007-09-11 Thread Frank E Harrell Jr
Fiona Callaghan wrote: > Hi Chris. Thanks for replying. I want to take the pruned list of > subtrees, and select the final tree from this list using a bootstrap > technique (rather than cross validation). I think, and I could be wrong, The result will be very poor predictive accuracy on new sa

Re: [R] using bootstrap for tree selection step in rpart

2007-09-11 Thread Fiona Callaghan
Hi Chris. Thanks for replying. I want to take the pruned list of subtrees, and select the final tree from this list using a bootstrap technique (rather than cross validation). I think, and I could be wrong, that bagging takes a bunch of bootstrap samples, grows one tree per boostrap sample and