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After fitting and pruning an rpart model, it is often the case that one or more of the original predictors is not used by any of the splits of the final tree. It seems logical, therefore, that values for these...
Jean, Thanks for your quick reply and suggestions! > In the help file for predict.rpart it says, "The predictors referred to in > the right side of formula(object) must be present by name in newdata." I was aware of that...
I would like to build a forest of regression trees to see how well some covariates predict a response variable and to examine the importance of the covariates. I have a small number of covariates (8) and large number of...
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