Interface  Description 

VectorTransformer 
:: DeveloperApi ::
Trait for transformation of a vector

Class  Description 

ChiSqSelector  
ChiSqSelectorModel 
Chi Squared selector model.

ElementwiseProduct 
Outputs the Hadamard product (i.e., the elementwise product) of each input vector with a
provided "weight" vector.

HashingTF 
Maps a sequence of terms to their term frequencies using the hashing trick.

IDF 
Inverse document frequency (IDF).

IDF.DocumentFrequencyAggregator 
Document frequency aggregator.

IDFModel 
Represents an IDF model that can transform term frequency vectors.

Normalizer 
Normalizes samples individually to unit L^p^ norm

PCA 
A feature transformer that projects vectors to a lowdimensional space using PCA.

PCAModel 
Model fitted by
PCA that can project vectors to a lowdimensional space using PCA. 
StandardScaler 
Standardizes features by removing the mean and scaling to unit std using column summary
statistics on the samples in the training set.

StandardScalerModel 
Represents a StandardScaler model that can transform vectors.

VocabWord 
Entry in vocabulary

Word2Vec  
Word2VecModel 