cc.mallet.grmm.types
Class BoltzmannPairFactor

java.lang.Object
  cc.mallet.grmm.types.AbstractTableFactor
      cc.mallet.grmm.types.TableFactor
          cc.mallet.grmm.types.BoltzmannPairFactor

All Implemented Interfaces:

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

public class BoltzmannPairFactor
extends TableFactor

A factor over a continuous variable theta and binary variables var. such that phi(x|theta) is Potts. That is, for fixed theta, phi(x) = 1 if all x are equal, and exp^{-theta} otherwise. $Id: BoltzmannPairFactor.java,v 1.1 2007/10/22 21:37:44 mccallum Exp $

See Also:

Serialized Form

Field Summary

Fields inherited from class cc.mallet.grmm.types.AbstractTableFactor

probs

Constructor Summary

BoltzmannPairFactor(Variable x1, Variable x2, double sigma)

Method Summary

boolean	almostEquals(Factor p, double epsilon)
Factor	duplicate()
boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isNaN()
Factor	multiply(Factor other) Returns the elementwise product of this potential and another one.
java.lang.String	prettyOutputString()
static double[]	sigma2vals(double sigma)

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

createBlankSubset, divideByInternal, exponentiate, getLogValueMatrix, getValueMatrix, logValue, logValue, logValue, makeFromLogValues, marginalizeInternal, multiplyAll, multiplyAll, multiplyByInternal, normalize, plusEqualsAtLocation, plusEqualsInternal, rawValue, rawValue, recenter, setLogValue, setLogValue, setLogValues, setValue, setValues, slice_general, slice_onevar, slice_twovar, sum, timesEquals, value, value, value, valueAtLocation

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

almostEquals, argmax, assignmentIterator, asTable, clone, containsVar, divideBy, divideBy, dumpToString, ensureOperandCompatible, entropy, extractMax, extractMax, extractMax, findVariable, getNumVars, getValues, getVariable, indexAtLocation, logsum, makeIdentityFactor, marginalize, marginalize, marginalize, marginalizeOut, marginalizeOut, multiplyBy, numLocations, plusEquals, plusEquals, printSizes, printValues, sample, sampleLocation, setRawValue, setRawValue, setRawValue, setValues, singleIndex, slice, toLogValueArray, toString, toValueArray, varSet

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BoltzmannPairFactor

public BoltzmannPairFactor(Variable x1,
                           Variable x2,
                           double sigma)

Method Detail

sigma2vals

public static double[] sigma2vals(double sigma)

duplicate

public Factor duplicate()

Specified by:

duplicate in interface Factor

Overrides:

duplicate in class TableFactor

almostEquals

public boolean almostEquals(Factor p,
                            double epsilon)

Specified by:

almostEquals in interface Factor

Overrides:

almostEquals in class AbstractTableFactor

isNaN

public boolean isNaN()

Specified by:

isNaN in interface Factor

Overrides:

isNaN in class AbstractTableFactor

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

prettyOutputString

public java.lang.String prettyOutputString()

Specified by:

prettyOutputString in interface Factor

Overrides:

prettyOutputString in class AbstractTableFactor

multiply

public Factor multiply(Factor other)

Description copied from class: AbstractTableFactor

Returns the elementwise product of this potential and another one.

Specified by:

multiply in interface Factor

Overrides:

multiply in class AbstractTableFactor