edu.umass.cs.mallet.base.fst

Class Transducer.ViterbiPath

java.lang.Object

edu.umass.cs.mallet.base.types.SequencePair

edu.umass.cs.mallet.base.types.SequencePairAlignment

edu.umass.cs.mallet.base.fst.Transducer.ViterbiPath

Enclosing class:

Transducer

public class Transducer.ViterbiPath
extends SequencePairAlignment

Field Summary

Fields inherited from class edu.umass.cs.mallet.base.types.SequencePairAlignment

cost

Fields inherited from class edu.umass.cs.mallet.base.types.SequencePair

confidenceNBest, costNBest, input, output, outputNBest

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ViterbiPath(Sequence inputSequence, Sequence outputSequence)
protected	ViterbiPath(Sequence inputSequence, Sequence outputSequence, boolean saveLattice)

Method Summary

Modifier and Type	Method and Description
Transducer.State	getBestState(int ip)
Sequence	getBestStates() Returns the maximum-value state sequence from this Lattice.
double	getDelta(int ip, int stateIndex)
Transducer.State	getStateAtRank(int ip, int rank)
Transducer	getTransducer()
protected edu.umass.cs.mallet.base.fst.Transducer.ViterbiPath.ViterbiNode	getViterbiNode(edu.umass.cs.mallet.base.fst.Transducer.ViterbiPath.ViterbiNode[][] nodes, int ip, int stateIndex)
void	incrementTransducerCounts()
double	tokenAccuracy(Sequence referenceOutput)
double	tokenAccuracy(Sequence referenceOutput, PrintWriter out)
SequencePairAlignment	trimStateInfo()

Methods inherited from class edu.umass.cs.mallet.base.types.SequencePairAlignment

getCost

Methods inherited from class edu.umass.cs.mallet.base.types.SequencePair

confidenceNBest, costNBest, input, output, outputNBest

Methods inherited from class java.lang.Object

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

Constructor Detail

ViterbiPath

protected ViterbiPath(Sequence inputSequence,
                      Sequence outputSequence)

ViterbiPath

protected ViterbiPath(Sequence inputSequence,
                      Sequence outputSequence,
                      boolean saveLattice)

Method Detail

getDelta

public double getDelta(int ip,
                       int stateIndex)

getBestState

public Transducer.State getBestState(int ip)

getStateAtRank

public Transducer.State getStateAtRank(int ip,
                                       int rank)

getViterbiNode

protected edu.umass.cs.mallet.base.fst.Transducer.ViterbiPath.ViterbiNode getViterbiNode(edu.umass.cs.mallet.base.fst.Transducer.ViterbiPath.ViterbiNode[][] nodes,
                                                                                         int ip,
                                                                                         int stateIndex)

incrementTransducerCounts

public void incrementTransducerCounts()

trimStateInfo

public SequencePairAlignment trimStateInfo()

tokenAccuracy

public double tokenAccuracy(Sequence referenceOutput)

tokenAccuracy

public double tokenAccuracy(Sequence referenceOutput,
                            PrintWriter out)

getTransducer

public Transducer getTransducer()

getBestStates

public Sequence getBestStates()

Returns the maximum-value state sequence from this Lattice. This is distinct from SequencePair.output(), which returns the Transducer's output from the most likely state sequence.

Almost all applications will want to use the output method instead. An exception are debugging tools that care specifically about the state sequence.

Returns:

A Sequence of Strings. Its length will be the input length plus 1. (for start state).