Transform a collection of weighted categorical features to columns of weight sums, with at most N values.
Transform a collection of weighted categorical features to columns of weight sums, with at most N values.
Weights of the same labels in a row are summed instead of 1.0 as is the case with the normal NHotEncoder.
Missing values are transformed to [0.0, 0.0, ...].
When using aggregated feature summary from a previous session, unseen labels are ignored.