As the complexity parameter is calculated? What is the meaning of it?
From what I read, the cp is a value at which the tree makes divisions in the nodes until the reduction in the relative error is less than a certain value.
There are places I read that say the CP affects only the growth of the tree and others say that interferes with pruning too. For min appears that it interferes only in growth but not sure.
I am using rpart () package to create trees, in the case of the classification tree exists missclassification rate to evaluate the ratings, but in the case of regression is not anything to evaluate the predictions beyond the MSE?