R help - May 2006 - How to use a validation set rather than the default cross-validation in rpart() ?

I want use a validation set for my classification tree rather than the
default 10-fold validation in rpart() but can't see which arguments to use
to get this right. Advice appreciated thanks. I assume that this is
possible!

 

 

 


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Quin Wills wrote:
> I want use a validation set for my classification tree rather than the
> default 10-fold validation in rpart() but can't see which arguments to
use
> to get this right. Advice appreciated thanks. I assume that this is
> possible!
You cannot for the internal algorithm that optimizes the splits of the 
tree. Of course you can do so for estimating the misclassification rate 
(or whatever), but this has nothing to do with rpart() itself....

Uwe Ligges