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

java.lang.Object
  extended byedu.umass.cs.mallet.base.pipe.Pipe
      extended byedu.umass.cs.mallet.base.pipe.tsf.OffsetFeatureConjunction
All Implemented Interfaces:
java.io.Serializable

public class OffsetFeatureConjunction
extends Pipe
implements java.io.Serializable

See Also:
Serialized Form

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

OffsetFeatureConjunction

public OffsetFeatureConjunction(java.lang.String thisFeatureName,
                                java.lang.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.