tree$variable.importance returns NULL with rpart() decision tree


Split from Decision Tree in R rpart() variable importance

**str[quote="KafeelI, post:1, topic:17100, full:true"]
I was able to get variable importance using iris data in R, using below code


But when I tried the same with other data I have. tree$variable.importance returns NULL. Any specific reason for that. I was getting NaN for variable importance using "rf" method in caret. varImp() was used.

How to add simple Cod**


Decision Tree in R rpart() variable importance

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