burlap.behavior.valuefunction

Class ValueFunctionInitialization.ConstantValueFunctionInitialization

java.lang.Object

burlap.behavior.valuefunction.ValueFunctionInitialization.ConstantValueFunctionInitialization

All Implemented Interfaces:

ValueFunction, ValueFunctionInitialization

Enclosing interface:

ValueFunctionInitialization

public static class ValueFunctionInitialization.ConstantValueFunctionInitialization
extends java.lang.Object
implements ValueFunctionInitialization

A ValueFunctionInitialization implementation that always returns a constant value.

Author:

James MacGlashan

Nested Class Summary

Nested classes/interfaces inherited from interface burlap.behavior.valuefunction.ValueFunctionInitialization

ValueFunctionInitialization.ConstantValueFunctionInitialization

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
ValueFunctionInitialization.ConstantValueFunctionInitialization() Will cause this object to return 0 for all initialization values.
ValueFunctionInitialization.ConstantValueFunctionInitialization(double value) Will cause this object to return value for all initialization values.

Method Summary

Methods

Modifier and Type	Method and Description
double	qValue(State s, AbstractGroundedAction a) Returns the initialization value of the Q-value function for a given state and 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

ValueFunctionInitialization.ConstantValueFunctionInitialization

public ValueFunctionInitialization.ConstantValueFunctionInitialization()

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

ValueFunctionInitialization.ConstantValueFunctionInitialization

public ValueFunctionInitialization.ConstantValueFunctionInitialization(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,
            AbstractGroundedAction a)

Description copied from interface: ValueFunctionInitialization

Returns the initialization value of the Q-value function for a given state and action pair.

Specified by:

qValue in interface ValueFunctionInitialization

Parameters:

s - the state for which to get the initial value of the Q-value function.

a - the action for which to get the initial value of the Q-value function.

Returns:

the initialization value of the Q-value function for a given state and action pair.