[R] Minimum valid number of observations for rpart

[fjlozl at unileon.es]

Hi,
I wonder if anyone knows a study dealing with the minimum valid number of
observations when using CART?.
On top of that, when using RandomForest, is it possible to obtained a
interpretable tree model as the graphical output of the analysis, just
like in "rpart"?

Thanks a lot in advance

Javier Lozano
Universidad de León
Spain