cc.mallet.fst
Class SumLatticeBeam

java.lang.Object
  cc.mallet.fst.SumLatticeBeam

All Implemented Interfaces:

SumLattice

public class SumLatticeBeam
extends java.lang.Object
implements SumLattice

Nested Class Summary

static class

SumLatticeBeam.Factory

Field Summary

protected static int

beamWidth

Constructor Summary

SumLatticeBeam(Transducer t, Sequence input, Sequence output, Transducer.Incrementor incrementor)

SumLatticeBeam(Transducer t, Sequence input, Sequence output, Transducer.Incrementor incrementor, boolean saveXis)

SumLatticeBeam(Transducer t, Sequence input, Sequence output, Transducer.Incrementor incrementor, boolean saveXis, LabelAlphabet outputAlphabet)

SumLatticeBeam(Transducer t, Sequence input, Sequence output, Transducer.Incrementor incrementor, LabelAlphabet outputAlphabet, int[] constraints)
Create a lattice that constrains its transitions such that the pairs in "constraints" are adhered to.

Method Summary

double	getAlpha(int ip, Transducer.State s)
int	getBeamWidth()
double	getBeta(int ip, Transducer.State s)
double	getGammaProbability(int inputPosition, Transducer.State s)
double[][]	getGammas()
double	getGammaWeight(int inputPosition, Transducer.State s)
Sequence	getInput()
LabelVector	getLabelingAtPosition(int outputPosition)
double[]	getNstatesExpl()
int	getTctIter()
double	getTotalWeight()
Transducer	getTransducer()
boolean	getUseForwardBackwardBeam()
double	getXiProbability(int ip, Transducer.State s1, Transducer.State s2)
double[][][]	getXis()
double	getXiWeight(int ip, Transducer.State s1, Transducer.State s2)
void	incIter()
int	length()
void	setBeamWidth(int beamWidth)
void	setCurIter(int curIter)
void	setKLeps(double KLeps)
void	setRmin(double Rmin)
void	setUseForwardBackwardBeam(boolean state)

Methods inherited from class java.lang.Object

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

Field Detail

beamWidth

protected static int beamWidth

Constructor Detail

SumLatticeBeam

public SumLatticeBeam(Transducer t,
                      Sequence input,
                      Sequence output,
                      Transducer.Incrementor incrementor)

SumLatticeBeam

public SumLatticeBeam(Transducer t,
                      Sequence input,
                      Sequence output,
                      Transducer.Incrementor incrementor,
                      boolean saveXis)

SumLatticeBeam

public SumLatticeBeam(Transducer t,
                      Sequence input,
                      Sequence output,
                      Transducer.Incrementor incrementor,
                      boolean saveXis,
                      LabelAlphabet outputAlphabet)

SumLatticeBeam

public SumLatticeBeam(Transducer t,
                      Sequence input,
                      Sequence output,
                      Transducer.Incrementor incrementor,
                      LabelAlphabet outputAlphabet,
                      int[] constraints)

Create a lattice that constrains its transitions such that the pairs in "constraints" are adhered to. constraints is an array where each entry is the index of the required label at that position. An entry of 0 means there are no constraints on that . Positive values mean the path must pass through that state. Negative values mean the path must _not_ pass through that state. NOTE - constraints.length must be equal to output.size() + 1. A lattice has one extra position for the initial state. Generally, this should be unconstrained, since it does not produce an observation.

Method Detail

getBeamWidth

public int getBeamWidth()

setBeamWidth

public void setBeamWidth(int beamWidth)

getTctIter

public int getTctIter()

setCurIter

public void setCurIter(int curIter)

incIter

public void incIter()

setKLeps

public void setKLeps(double KLeps)

setRmin

public void setRmin(double Rmin)

getNstatesExpl

public double[] getNstatesExpl()

getUseForwardBackwardBeam

public boolean getUseForwardBackwardBeam()

setUseForwardBackwardBeam

public void setUseForwardBackwardBeam(boolean state)

getInput

public Sequence getInput()

Specified by:

getInput in interface SumLattice

getTotalWeight

public double getTotalWeight()

Specified by:

getTotalWeight in interface SumLattice

getGammaWeight

public double getGammaWeight(int inputPosition,
                             Transducer.State s)

Specified by:

getGammaWeight in interface SumLattice

getGammaProbability

public double getGammaProbability(int inputPosition,
                                  Transducer.State s)

Specified by:

getGammaProbability in interface SumLattice

getXis

public double[][][] getXis()

Specified by:

getXis in interface SumLattice

getGammas

public double[][] getGammas()

Specified by:

getGammas in interface SumLattice

getXiProbability

public double getXiProbability(int ip,
                               Transducer.State s1,
                               Transducer.State s2)

Specified by:

getXiProbability in interface SumLattice

getXiWeight

public double getXiWeight(int ip,
                          Transducer.State s1,
                          Transducer.State s2)

Specified by:

getXiWeight in interface SumLattice

length

public int length()

Specified by:

length in interface SumLattice

getAlpha

public double getAlpha(int ip,
                       Transducer.State s)

Specified by:

getAlpha in interface SumLattice

getBeta

public double getBeta(int ip,
                      Transducer.State s)

Specified by:

getBeta in interface SumLattice

getLabelingAtPosition

public LabelVector getLabelingAtPosition(int outputPosition)

Specified by:

getLabelingAtPosition in interface SumLattice

getTransducer

public Transducer getTransducer()

Specified by:

getTransducer in interface SumLattice