ostore.oil
Class HMM.Delta

java.lang.Object
  |
  +--ostore.oil.HMM.Delta

All Implemented Interfaces:

Model.Delta, QueueElementIF, QuickSerializable

Enclosing class:

HMM

public static class HMM.Delta

extends Object

implements Model.Delta

A HMM.Delta object contains a diff of the sufficient statistics for an HMM.

Version:

$Id: HMM.java,v 1.31 2002/07/20 19:38:03 srhea Exp $

Author:

Dennis Geels

Field Summary

Matrix	emissions Estimated count of state-output emissions.
Array	marginals Estimated marginal counts for each state.
QSVector	states The set of states referenced in the sufficient statistics.
Matrix	transitions Estimated count of state-state transitions.

Constructor Summary

HMM.Delta(InputBuffer buffer)
Constructs a Delta from its serialized form.

HMM.Delta(QSVector states, Array marginals, Matrix transitions, Matrix emissions)
Constructs a Delta with the specified HMM data.

Method Summary

void	serialize(OutputBuffer buffer) Add the object to the buffer.
Model.Delta	sum(Model.Delta other) Produce the sum of this and another Delta.

Methods inherited from class java.lang.Object

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

Field Detail

states

public QSVector states

The set of states referenced in the sufficient statistics. The order is unimportant.

marginals

public Array marginals

Estimated marginal counts for each state.

transitions

public Matrix transitions

Estimated count of state-state transitions.

emissions

public Matrix emissions

Estimated count of state-output emissions.

Constructor Detail

HMM.Delta

public HMM.Delta(QSVector states,
                 Array marginals,
                 Matrix transitions,
                 Matrix emissions)

Constructs a Delta with the specified HMM data. The statistics should only contain entries for the specified states.

Parameters:

states - The set of states contained in this Delta

marginals - A QuickSerializable->double mapping from states to their marginal sufficient statistic.

transitions - A QuickSerializable->Array mapping from states to their transition sufficient statistics.

emissions - A QuickSerializable->Array mapping from states to their emission sufficient statistics.

HMM.Delta

public HMM.Delta(InputBuffer buffer)
          throws QSException

Constructs a Delta from its serialized form.

Method Detail

sum

public Model.Delta sum(Model.Delta other)

Description copied from interface: Model.Delta

Produce the sum of this and another Delta.

Specified by:

sum in interface Model.Delta

Parameters:

other - The other Delta.

Returns:

a new Delta, constructed such that applying it to a Model produces an equivalent Model to that produced by adding first this, then other.

serialize

public void serialize(OutputBuffer buffer)

Description copied from interface: QuickSerializable

Add the object to the buffer.

Specified by:

serialize in interface QuickSerializable

Parameters:

buffer - the output buffer to add the object to