burlap.behavior.valuefunction

Class ConstantValueFunction

java.lang.Object

burlap.behavior.valuefunction.ConstantValueFunction

All Implemented Interfaces:

QFunction, ValueFunction

public class ConstantValueFunction
extends java.lang.Object
implements QFunction

A QFunction implementation that always returns a constant value. Useful for value function initialization.

Author:

James MacGlashan

Field Summary

Fields

Modifier and Type	Field and Description
double	value The constant value to return for all initializations.

Constructor Summary

Constructors

Constructor and Description
ConstantValueFunction() Will cause this object to return 0 for all initialization values.
ConstantValueFunction(double value) Will cause this object to return value for all initialization values.

Method Summary

Modifier and Type	Method and Description
double	qValue(State s, Action a) Returns the QValue for the given state-action pair.
double	value(State s) Returns the value function evaluation of the given state.

Methods inherited from class java.lang.Object

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

Field Detail

value

public double value

The constant value to return for all initializations.

Constructor Detail

ConstantValueFunction

public ConstantValueFunction()

Will cause this object to return 0 for all initialization values.

ConstantValueFunction

public ConstantValueFunction(double value)

Will cause this object to return value for all initialization values.

Parameters:

value - the value to return for all initializations.

Method Detail

value

public double value(State s)

Description copied from interface: ValueFunction

Returns the value function evaluation of the given state. If the value is not stored, then the default value specified by the ValueFunctionInitialization object of this class is returned.

Specified by:

value in interface ValueFunction

Parameters:

s - the state to evaluate.

Returns:

the value function evaluation of the given state.

qValue

public double qValue(State s,
                     Action a)

Description copied from interface: QFunction

Returns the QValue for the given state-action pair.

Specified by:

qValue in interface QFunction

Parameters:

s - the input state

a - the input action

Returns:

the QValue for the given state-action pair.