edu.umass.cs.mallet.base.pipe.tsf

Class OffsetFeatureConjunction

java.lang.Object

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

edu.umass.cs.mallet.base.pipe.tsf.OffsetFeatureConjunction

All Implemented Interfaces:

Serializable

public class OffsetFeatureConjunction
extends Pipe
implements Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
OffsetFeatureConjunction(String thisFeatureName, String[] featureNames, int[] offsets)
OffsetFeatureConjunction(String thisFeatureName, String[] featureNames, int[] offsets, boolean tagAllTimesteps)
OffsetFeatureConjunction(String thisFeatureName, String[] featureNames, int[] offsets, boolean[] isNonNegated, boolean tagAllTimesteps) Create a Pipe for adding conjunctions of specified features.

Method Summary

Modifier and Type	Method and Description
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

OffsetFeatureConjunction

public OffsetFeatureConjunction(String thisFeatureName,
                                String[] featureNames,
                                int[] offsets,
                                boolean[] isNonNegated,
                                boolean tagAllTimesteps)

Create a Pipe for adding conjunctions of specified features.

Parameters:

thisFeatureName - Name of this conjunction feature.

featureNames - String giving name for each subfeature i.

offsets - For each subfeature i, which offset from the current timestep must i appear at.

isNonNegated - If element i is false, then the negation of the feature is added to the conjuction.

OffsetFeatureConjunction

public OffsetFeatureConjunction(String thisFeatureName,
                                String[] featureNames,
                                int[] offsets,
                                boolean tagAllTimesteps)

OffsetFeatureConjunction

public OffsetFeatureConjunction(String thisFeatureName,
                                String[] featureNames,
                                int[] offsets)

Method Detail

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.