LGames
Class CompositionalDGame2

java.lang.Object
  |
  +--LGames.DGame
        |
        +--LGames.CompositionalDGame2

public class CompositionalDGame2

extends DGame

The class CompositionalDGame2 implements the discrimination games in the compositional set-up. The function playGame is used to control the game.

Copyright (c) 2004 Paul Vogt

Field Summary

Fields inherited from class LGames.DGame

iMeaning, maxMeanings

Constructor Summary

CompositionalDGame2()
Empty constructor

CompositionalDGame2(int m)
Constructor that specifies the holistic conceptual space

CompositionalDGame2(int m, java.util.List o)
Constructor that specifies the holistic conceptual space, and sets a pointer to the agent's ontology

Method Summary

IntArray	decayWeights() Currently not used
IntArray	getDCS(int topic) returns the distinctive category set.
Meaning	getTopic(int topic) returns the Meaning representation of the topic
int	playGame(Context cxt, int topic, int timestamp, boolean adapt) playGame controls a discrimination game.
void	test() Function to test the algorithm.

Methods inherited from class LGames.DGame

getDim, playGame, setDim, setMaxMeanings

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositionalDGame2

public CompositionalDGame2()

Empty constructor

CompositionalDGame2

public CompositionalDGame2(int m)

Constructor that specifies the holistic conceptual space

Parameters:

m - the `cover' of the conceptual space (integer representation of the bit-string indicating which dimensions are used.

CompositionalDGame2

public CompositionalDGame2(int m,
                           java.util.List o)

Constructor that specifies the holistic conceptual space, and sets a pointer to the agent's ontology

Parameters:

m - the `cover' of the conceptual space (integer representation of the bit-string indicating which dimensions are used.

o - the ontology

Method Detail

test

public void test()

Function to test the algorithm. Used to set an artificial category set.

playGame

public int playGame(Context cxt,
                    int topic,
                    int timestamp,
                    boolean adapt)

playGame controls a discrimination game. The function first calls a categorisation function where it categorises the featureVector of the context in relation to the ontology. It then tries to discriminate the topic from the rest of the context. If this fails, a new category is added to the ontology, otherwise the category is shifted towards the topic and possibly merged with another category if it comes too close.

Parameters:

cxt - the Context

topic - the index of the topic pointing to the topic-th element of the cxt list.

timestamp - the current time (language game)

adapt - sets learning on (true) or off (false)

Returns:

topic if DG succeeds, -1 otherwise.

decayWeights

public IntArray decayWeights()

Currently not used

getDCS

public IntArray getDCS(int topic)

returns the distinctive category set.

getTopic

public Meaning getTopic(int topic)

returns the Meaning representation of the topic