You will need to give more detail of exactly what you mean by "prune using a validation
set". THe prune.rpart function will prune at any value you want, what I suspect you are
looking for is to compute the error of each possible tree, using a validation data set,
then find the best one, and then prune there.
How do you define "best"?
Terry Therneau
On 02/26/2017 05:00 AM, r-help-requ...@r-project.org wrote:
I'd like to use a different data ( validation) set for pruning my
classification tree. Unfortunately there aren't arguments to get this in
prune.rpart().
Any suggestions?
Thanks!
Alfredo
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