?combine in randomForest:
The confusion, err.rate, mse and rsq components (as well as the corresponding components in the test compnent, if exist) of the combined object will be NULL.
Why are the err.rate, mse and rsq components for the combined NULL? Is there an efficient way to re-calculate these metrics?
I ask because I would like to figure out a way to use the
oob re-sampling method with the
parRF model in caret.