How to solve for importance in R

Question

When I typed the command for importance as below importance ( model.rf ) I get this error:

Error in UseMethod("importance") : no applicable method for 'importance' applied to an object of class "c('randomForest.formula', 'randomForest')"

How to solve this error?

Answer 1

output.forest <- randomForest(nativeSpeaker ~ age + shoeSize + score,  data = 
readingSkills,importance=TRUE)
#You can use like this - Solution
out.importance <- round(importance(output.forest), 2)
print(out.importance )

first convert importance to variable and then print that out.