Hello all,
I'm making a decision tree with the rpart package. I want to prune the tree and
in many tutorials it says to use cptable. Like so: opt <-
which.min(model_rpart$cptable[, "xerror"])
The problem is that when I look up model_rpart$cptable it only show the columns
CP, nsplit, rel error. So xerror and xstd are missing. How can this be?
Model looks like this: model <- rpart(Product~. , data=trainData,
control=rpart.control(minsplit=50, cp=0.002, xval=0))
Thank you.
Kim
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