Package net.sf.tweety.logics.commons.analysis

Class DfInconsistencyMeasure<S extends Formula>

java.lang.Object

net.sf.tweety.logics.commons.analysis.BeliefSetInconsistencyMeasure<S>

net.sf.tweety.logics.commons.analysis.DfInconsistencyMeasure<S>

Type Parameters:

S - The specific type of formulas

All Implemented Interfaces:

PostulateEvaluatable<S>, InconsistencyMeasure<BeliefSet<S,?>>

public class DfInconsistencyMeasure<S extends Formula>
extends BeliefSetInconsistencyMeasure<S>

This class implements the family of "Measures of the Degree of Inconsistency" from [Mu,Liu,Jin, Bell. A syntax-based approach to measuring the degree of inconsistency for belief bases. IJAR 52(7), 2011.]

Author:

Matthias Thimm

Field Summary

Fields

Modifier and Type	Field	Description
private MusEnumerator<S>	enumerator	The MUs enumerator.
private SimpleFunction<double[],java.lang.Double>	measureFunction	The measure function used to aggregate the normalized cardinalities of minimal inconsistent subsets.

Fields inherited from interface net.sf.tweety.logics.commons.analysis.InconsistencyMeasure

MEASURE_TOLERANCE

Constructor Summary

Constructors

Constructor	Description
DfInconsistencyMeasure(SimpleFunction<double[],java.lang.Double> measureFunction, MusEnumerator<S> enumerator)	Creates a new inconsistency measure.

Method Summary

Modifier and Type	Method	Description
private double[]	getConsistentSetCounts(java.util.Collection<S> inFormulas, java.util.Collection<S> restFormulas, java.util.Collection<java.util.Collection<S>> mus, int card)	Computes the numbers of consistent subsets for cardinalities |inFormulas|...|inFormulas|+|restFormulas| (the knowledge base considered is inFormulas\cup restFormulas and the formulas in inFormulas have to be part of every considered subset).
java.lang.Double	inconsistencyMeasure(java.util.Collection<S> formulas)	This method measures the inconsistency of the given set of formulas.
java.lang.String	toString()

Methods inherited from class net.sf.tweety.logics.commons.analysis.BeliefSetInconsistencyMeasure

inconsistencyMeasure

Methods inherited from class java.lang.Object

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

Field Detail

enumerator

private MusEnumerator<S extends Formula> enumerator

The MUs enumerator.

measureFunction

private SimpleFunction<double[],java.lang.Double> measureFunction

The measure function used to aggregate the normalized cardinalities of minimal inconsistent subsets.

Constructor Detail

DfInconsistencyMeasure

public DfInconsistencyMeasure(SimpleFunction<double[],java.lang.Double> measureFunction,
                              MusEnumerator<S> enumerator)

Creates a new inconsistency measure.

Parameters:

measureFunction - the measure function used to aggregate the normalized cardinalities of minimal inconsistent subsets.

enumerator - some MUs enumerator

Method Detail

inconsistencyMeasure

public java.lang.Double inconsistencyMeasure(java.util.Collection<S> formulas)

Description copied from class: BeliefSetInconsistencyMeasure

This method measures the inconsistency of the given set of formulas.

Specified by:

inconsistencyMeasure in class BeliefSetInconsistencyMeasure<S extends Formula>

Parameters:

formulas - a collection of formulas.

Returns:

a Double indicating the degree of inconsistency.

getConsistentSetCounts

private double[] getConsistentSetCounts(java.util.Collection<S> inFormulas,
                                        java.util.Collection<S> restFormulas,
                                        java.util.Collection<java.util.Collection<S>> mus,
                                        int card)

Computes the numbers of consistent subsets for cardinalities |inFormulas|...|inFormulas|+|restFormulas| (the knowledge base considered is inFormulas\cup restFormulas and the formulas in inFormulas have to be part of every considered subset).

Parameters:

inFormulas - a set of formulas that are in.

restFormulas - the remaining formulas

mus - the set of mus

card - the cardinality of the whole knowledge base.

Returns:

the numbers of consistent subsets for cardinalities |inFormulas|...|inFormulas|+|restFormulas|

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object