edu.umass.cs.mallet.base.pipe

Class TokenSequence2FeatureSequenceWithBigrams

java.lang.Object

edu.umass.cs.mallet.base.pipe.Pipe

edu.umass.cs.mallet.base.pipe.TokenSequence2FeatureSequenceWithBigrams

All Implemented Interfaces:

Serializable

public class TokenSequence2FeatureSequenceWithBigrams
extends Pipe

Convert the token sequence in the data field of each instance to a feature sequence that preserves bigram information.

Author:

Andrew McCallum mccallum@cs.umass.edu

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TokenSequence2FeatureSequenceWithBigrams()
TokenSequence2FeatureSequenceWithBigrams(Alphabet dataDict)

Method Summary

Modifier and Type	Method and Description
Alphabet	getBigramAlphabet()
Instance	pipe(Instance carrier) Process an Instance.

Methods inherited from class edu.umass.cs.mallet.base.pipe.Pipe

getDataAlphabet, getInstanceId, getParent, getParentRoot, getTargetAlphabet, isDataAlphabetSet, isTargetProcessing, pipe, readResolve, resolveDataAlphabet, resolveTargetAlphabet, setDataAlphabet, setParent, setTargetAlphabet, setTargetProcessing

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TokenSequence2FeatureSequenceWithBigrams

public TokenSequence2FeatureSequenceWithBigrams(Alphabet dataDict)

TokenSequence2FeatureSequenceWithBigrams

public TokenSequence2FeatureSequenceWithBigrams()

Method Detail

getBigramAlphabet

public Alphabet getBigramAlphabet()

pipe

public Instance pipe(Instance carrier)

Description copied from class: Pipe

Process an Instance. This method takes an input Instance, destructively modifies it in some way, and returns it. This is the method by which all pipes are eventually run.

One can create a new concrete subclass of Pipe simply by implementing this method.

Specified by:

pipe in class Pipe

Parameters:

carrier - Instance to be processed.