burlap.behavior.functionapproximation.dense

Class DenseCrossProductFeatures

java.lang.Object

burlap.behavior.functionapproximation.dense.DenseCrossProductFeatures

All Implemented Interfaces:

DenseStateActionFeatures

public class DenseCrossProductFeatures
extends java.lang.Object
implements DenseStateActionFeatures

Class that generates state-action features as cross product of underlying state-features with the action set.

Author:

James MacGlashan.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<Action,java.lang.Integer>	actionOffset A feature index offset for each action when using Q-value function approximation.
protected int	numActions The number of possible actions
protected DenseStateFeatures	stateFeatures The state features

Constructor Summary

Constructors

Constructor and Description
DenseCrossProductFeatures(DenseStateFeatures stateFeatures, int numActions)
DenseCrossProductFeatures(DenseStateFeatures stateFeatures, int numActions, java.util.Map<Action,java.lang.Integer> actionOffset)

Method Summary

Modifier and Type	Method and Description
DenseStateActionFeatures	copy() Returns a copy of this DenseStateActionFeatures
double[]	features(State s, Action a) Returns a feature vector represented as a double array for a given input state-action pair.
int	getActionOffset(Action a)
int	getNumActions()
DenseStateFeatures	getStateFeatures()
void	setNumActions(int numActions)
void	setStateFeatures(DenseStateFeatures stateFeatures)

Methods inherited from class java.lang.Object

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

Field Detail

stateFeatures

protected DenseStateFeatures stateFeatures

The state features

numActions

protected int numActions

The number of possible actions

actionOffset

protected java.util.Map<Action,java.lang.Integer> actionOffset

A feature index offset for each action when using Q-value function approximation.

Constructor Detail

DenseCrossProductFeatures

public DenseCrossProductFeatures(DenseStateFeatures stateFeatures,
                                 int numActions)

DenseCrossProductFeatures

public DenseCrossProductFeatures(DenseStateFeatures stateFeatures,
                                 int numActions,
                                 java.util.Map<Action,java.lang.Integer> actionOffset)

Method Detail

getStateFeatures

public DenseStateFeatures getStateFeatures()

setStateFeatures

public void setStateFeatures(DenseStateFeatures stateFeatures)

getNumActions

public int getNumActions()

setNumActions

public void setNumActions(int numActions)

features

public double[] features(State s,
                         Action a)

Description copied from interface: DenseStateActionFeatures

Returns a feature vector represented as a double array for a given input state-action pair.

Specified by:

features in interface DenseStateActionFeatures

Parameters:

s - the input state

a - the input action

Returns:

the feature vector represented as a double array.

copy

public DenseStateActionFeatures copy()

Description copied from interface: DenseStateActionFeatures

Returns a copy of this DenseStateActionFeatures

Specified by:

copy in interface DenseStateActionFeatures

Returns:

a copy of this DenseStateActionFeatures

getActionOffset

public int getActionOffset(Action a)