Package com.aliasi.features

Classes for extracting feature vectors from objects and parsing objects for feature handlers.

See:
          Description

Class Summary
AddFeatureExtractor<E> An AddFeatureExtractor returns feature vectors that result from summing the feature vectors returned by a collection of contained feature extractors.
BoundedFeatureExtractor<E> A BoundedFeatureExtractor provides a lower-bound and upper-bound on feature values between which all values from a contained base extractor are bounded.
CacheFeatureExtractor<E> A CacheFeatureExtractor uses a cache to store a mapping from objects to their feature vector maps.
ChunkerFeatureExtractor A ChunkerFeatureExtractor implements a feature extractor for character sequences based on a specified chunker.
FeatureExtractorFilter<E> A FeatureExtractorFilter contains a reference to another feature extractor.
Features The Features class contains static utility classes for manipulating features.
InteractionFeatureExtractor<E> An InteractionFeatureExtractor produces interaction features between two feature extractors.
KnownFeatureExtractor<E> A KnownFeatureExtractor restricts a base feature extractor to features contained in a set provided at construction time.
LengthNormFeatureExtractor<E> A LengthNormFeatureExtractor converts feature vectors produced by a contained extractor into unit length vectors.
ModifiedFeatureExtractor<E> A ModifiedFeatureExtractor allows feature values to be modified in a feature-specific fashion.
PrefixedFeatureExtractor<E> A PrefixedFeatureExtractor applies a specified prefix to all of the feature names from a base feature extractor.
StringLengthFeatureExtractor A StringLengthFeatureExtractor implements a feature extractor that provides string length features based on a specified set of string lengths.
ZScoreFeatureExtractor<E> A ZScoreFeatureExtractor converts features to their z-scores, where means and deviations are determined by a corpus supplied at compile time.
 

Package com.aliasi.features Description

Classes for extracting feature vectors from objects and parsing objects for feature handlers.