Calculate the percentage increase in OOB error of the forest when each feature is shuffled.
getVI(object, noWarning, seed = NULL)A `forestry` object.
flag to not display warnings
A parameter to seed the random number generator for shuffling the features of X.
The variable importance of the forest.
No seed is passed to this function so it is not possible in the current implementation to replicate the vector permutations used when measuring feature importance.