Identify all distinct variables within party ctree nodel

Question

I am using ctree function within party R package. I would like to idenfiy all predictors that are used within the tree in order to reduce the data.frame dimension used for furth

Answer 1

You can try using this:

getUsefulPredictors<-function(x){
  flatTree<-unlist(x@tree)
  pred<-unique(flatTree[grepl("*variableName",names(flatTree))])
  return(pred)
}

It flattens the trees and looks for the elements having variableName in their name

Run on your model it returns:

getUsefulPredictors(myModel)
#[1] "Temp" "Wind"