:: DeveloperApi :: Trait for transformation of a vector
:: Experimental :: Maps a sequence of terms to their term frequencies using the hashing trick.
:: Experimental :: Inverse document frequency (IDF).
Document frequency aggregator.
:: Experimental :: Represents an IDF model that can transform term frequency vectors.
:: Experimental :: Normalizes samples individually to unit L^p^ norm
:: Experimental :: Standardizes features by removing the mean and scaling to unit variance using column summary statistics on the samples in the training set.
:: Experimental :: Represents a StandardScaler model that can transform vectors.
:: Experimental :: Word2Vec creates vector representation of words in a text corpus.
:: Experimental :: Word2Vec model