Random Forest command in R for selected variables

Question

All I can find online is how a random forest is run on all variables in a dataset using the period:

RF <- randomForest(sale ~ ., data = TrainSet, importance = TRUE)

What if I only want to apply the RF to selected variables in the dataset? Would I need to drop the variables first?

I tried the following, but get an error: RF <- randomForest(sale ~ v1,v2,v3, data = TrainSet, importance = TRUE)

Please add the error message. – C8H10N4O2 Jun 19 '20 at 14:09 — C8H10N4O2, Jun 19 '20 at 14:09

score 1 · Answer 1 · answered Jun 15 '20 at 13:19

1

You have to do

RF <- randomForest(sale ~ v1 + v2 + v3, data = TrainSet, importance = TRUE)

this is the formula notation for R. It doesn't make a lot of sense for random forest models, but it is how it works.

answered Jun 15 '20 at 13:19

David Masip

1 Answers1