cc.mallet.grmm.types
Class UndirectedModel

java.lang.Object
  cc.mallet.grmm.types.FactorGraph
      cc.mallet.grmm.types.UndirectedModel

All Implemented Interfaces:

Factor, java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

ACRF.UnrolledGraph, UndirectedGrid

public class UndirectedModel
extends FactorGraph

Class for pairwise undirected graphical models, also known as pairwise Markov random fields. This is a thin wrapper over FactorGraph, with only a few methods added that don't make sense for non-pairwise graphs. Created: Dec 21, 2005

Version:

$Id: UndirectedModel.java,v 1.1 2007/10/22 21:37:44 mccallum Exp $

Author:

Serialized Form

Constructor Summary

UndirectedModel()

UndirectedModel(int capacity)

UndirectedModel(Variable[] vars)

Method Summary

void	addFactor(Factor factor) Adds a factor to the model.
static UndirectedModel	createBoltzmannMachine(double[][] weights, double[] biases) Creates an undirected model that corresponds to a Boltzmann machine with the given weights and biases.
java.util.Set	getEdgeSet()
boolean	isConnected(Variable v1, Variable v2)

Methods inherited from class cc.mallet.grmm.types.FactorGraph

addFactor, afterFactorAdd, allFactorsContaining, allFactorsContaining, allFactorsOf, allFactorsOf, almostEquals, almostEquals, argmax, assignmentIterator, asTable, beforeFactorAdd, clear, containsVar, divideBy, dump, dump, dumpToString, duplicate, entropy, exponentiate, extractMax, extractMax, extractMax, factorOf, factorOf, factorOf, factorOf, factorProduct, factors, factorsIterator, findVariable, get, getAdjacentVertices, getDegree, getFactor, getIndex, getIndex, getInferenceCache, getVariable, isAdjacent, isNaN, logify, logValue, logValue, logValue, marginalize, marginalize, marginalize, marginalizeOut, marginalizeOut, multiply, multiplyBy, normalize, numVariables, prettyOutputString, printAsDot, printAsDot, remove, remove, sample, sampleContinuousVars, setInferenceCache, slice, slice, sum, toString, value, value, variablesIterator, variablesSet, varSet, varSetIterator

Methods inherited from class java.lang.Object

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

Constructor Detail

UndirectedModel

public UndirectedModel()

UndirectedModel

public UndirectedModel(Variable[] vars)

UndirectedModel

public UndirectedModel(int capacity)

Method Detail

getEdgeSet

public java.util.Set getEdgeSet()

addFactor

public void addFactor(Factor factor)

Description copied from class: FactorGraph

Adds a factor to the model.

If a factor has already been added for the variables in the given clique, the effects of this method are (currently) undefined.

All convenience methods for adding factors eventually call through to this one, so this is the method for subclasses to override if they wish to perform additional actions when a factor is added to the graph.

Overrides:

addFactor in class FactorGraph

Parameters:

factor - A factor over the variables in clique.

createBoltzmannMachine

public static UndirectedModel createBoltzmannMachine(double[][] weights,
                                                     double[] biases)

Creates an undirected model that corresponds to a Boltzmann machine with the given weights and biases.

Parameters:

weights -

biases -

Returns:

An appropriate UndirectedModel.

isConnected

public boolean isConnected(Variable v1,
                           Variable v2)