Accessors and indexers for the different parts of a fold.
training(x = NULL, fold = NULL) validation(x = NULL, fold = NULL) fold_index(x = NULL, fold = NULL)
x | an object to be indexed by a training set, validation set, or fold index. If missing, the index itself will be returned. |
---|---|
fold | Fold; the fold used to do the indexing. If missing, |
The elements of x
corresponding to the indexes, or the
indexes themselves if x
is missing.