net.sf.tweety.arg.prob.dynamics

Class PAUpdateOperator

java.lang.Object

net.sf.tweety.arg.prob.dynamics.AbstractPAChangeOperator

net.sf.tweety.arg.prob.dynamics.PAUpdateOperator

All Implemented Interfaces:

ChangeOperator

public class PAUpdateOperator
extends AbstractPAChangeOperator

This operator implements an update of some probabilistic assessment of arguments upon the observation of an argumentation theory. More specifically, for a given probabilistic semantics S, some norm N, a function f, and a partial probability assignment PPA, it computes the S-prob-function that 1.) has minimal N-distance to PPA-compliant prob'functions and 2.) maximizes function f.

Author:

Matthias Thimm

Field Summary

Fields inherited from class net.sf.tweety.arg.prob.dynamics.AbstractPAChangeOperator

FIRST_OPTIMIZATION_WEIGHT

Constructor Summary

Constructors

Constructor and Description
PAUpdateOperator(PASemantics semantics, RealVectorNorm norm, SimpleRealValuedFunction f) Creates a new change operator for the given semantics that uses the specified norm for distance measuring and the given function for optimizing.

Method Summary

Modifier and Type	Method and Description
ProbabilisticExtension	change(PartialProbabilityAssignment ppa, DungTheory theory) Given a partial probability assignment ppa and an argumentation theory, compute the closest probabilistic extension that is adequate for observing the theory in the state ppa.

Methods inherited from class net.sf.tweety.arg.prob.dynamics.AbstractPAChangeOperator

change, getFunction, getNorm, getSemantics, prepareOptimizationProblem

Methods inherited from class java.lang.Object

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

Constructor Detail

PAUpdateOperator

public PAUpdateOperator(PASemantics semantics,
                        RealVectorNorm norm,
                        SimpleRealValuedFunction f)

Creates a new change operator for the given semantics that uses the specified norm for distance measuring and the given function for optimizing.

Parameters:

semantics - the semantics used for change.

norm - the norm used for distance measurement between probabilistic extensions.

f - the function that is maximized on the set of probabilistic extensions with minimal distance.

Method Detail

change

public ProbabilisticExtension change(PartialProbabilityAssignment ppa,
                                     DungTheory theory)

Description copied from interface: ChangeOperator

Given a partial probability assignment ppa and an argumentation theory, compute the closest probabilistic extension that is adequate for observing the theory in the state ppa.

Specified by:

change in interface ChangeOperator

Specified by:

change in class AbstractPAChangeOperator

Parameters:

ppa - some partial probability assignment.

theory - some theory.

Returns:

the closest probabilistic extension that is adequate for observing the theory in the state ppa.