burlap.domain.singleagent.pomdp.tiger

Class TigerDomain.TigerObservations

java.lang.Object

burlap.oomdp.singleagent.pomdp.ObservationFunction

burlap.domain.singleagent.pomdp.tiger.TigerDomain.TigerObservations

Enclosing class:

TigerDomain

public class TigerDomain.TigerObservations
extends ObservationFunction

Defines the Tiger domain observation function

Nested Class Summary

Nested classes/interfaces inherited from class burlap.oomdp.singleagent.pomdp.ObservationFunction

ObservationFunction.ObservationProbability

Field Summary

Fields

Modifier and Type	Field and Description
protected double	listenAccuracy

Fields inherited from class burlap.oomdp.singleagent.pomdp.ObservationFunction

domain

Constructor Summary

Constructors

Constructor and Description
TigerDomain.TigerObservations(PODomain domain, double listenAccuracy)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canEnumerateObservations() Returns whether this object can enumerate observations and implements the ObservationFunction.getAllPossibleObservations() and ObservationFunction.getObservationProbability(burlap.oomdp.core.states.State, burlap.oomdp.core.states.State, burlap.oomdp.singleagent.GroundedAction) methods.
java.util.List<State>	getAllPossibleObservations() Returns a List containing all possible observations.
java.util.List<ObservationFunction.ObservationProbability>	getObservationProbabilities(State state, GroundedAction action) Returns the observation probability mass/density function for all observations that have non-zero mass/density conditioned on the true MDP state and previous action taken that led to the state.
double	getObservationProbability(State observation, State state, GroundedAction action) Returns the probability that an observation will be observed conditioned on the MDP state and previous action taken that led to the state.
protected State	observationLeft() Returns the observation of hearing the tiger behind the left door
protected State	observationNothing() Returns the observation of hearing nothing; occurs when the do nothing action is selected
protected State	observationReset() Returns the observation of approaching a new pair of doors
protected State	observationRight() Returns the observation of hearing the tiger behind the right door
State	sampleObservation(State state, GroundedAction action) Samples an observation given the true MDP state and action taken in the previous step that led to the MDP state.

Methods inherited from class burlap.oomdp.singleagent.pomdp.ObservationFunction

getObservationProbabilitiesByEnumeration, sampleObservationByEnumeration

Methods inherited from class java.lang.Object

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

Field Detail

listenAccuracy

protected double listenAccuracy

Constructor Detail

TigerDomain.TigerObservations

public TigerDomain.TigerObservations(PODomain domain,
                             double listenAccuracy)

Method Detail

canEnumerateObservations

public boolean canEnumerateObservations()

Description copied from class: ObservationFunction

Returns whether this object can enumerate observations and implements the ObservationFunction.getAllPossibleObservations() and ObservationFunction.getObservationProbability(burlap.oomdp.core.states.State, burlap.oomdp.core.states.State, burlap.oomdp.singleagent.GroundedAction) methods.

Specified by:

canEnumerateObservations in class ObservationFunction

Returns:

True if this object can enumerate the observations; false otherwise.

getAllPossibleObservations

public java.util.List<State> getAllPossibleObservations()

Description copied from class: ObservationFunction

Returns a List containing all possible observations. Observations are represented with a class that implements the State interface, since observations may consist of multiple observations of distinct objects in the world.

Specified by:

getAllPossibleObservations in class ObservationFunction

Returns:

a List of all possible observations.

sampleObservation

public State sampleObservation(State state,
                      GroundedAction action)

Description copied from class: ObservationFunction

Samples an observation given the true MDP state and action taken in the previous step that led to the MDP state.

Specified by:

sampleObservation in class ObservationFunction

Parameters:

state - the true MDP state

action - the action that led to the MDP state

Returns:

an observation represented with a State.

getObservationProbability

public double getObservationProbability(State observation,
                               State state,
                               GroundedAction action)

Description copied from class: ObservationFunction

Returns the probability that an observation will be observed conditioned on the MDP state and previous action taken that led to the state.

Specified by:

getObservationProbability in class ObservationFunction

Parameters:

observation - the observation, represented by a State

state - The true MDP state that generated the observation.

action - the action that led to the MDP state and which generated the observation

Returns:

the probability of observing the observation.

getObservationProbabilities

public java.util.List<ObservationFunction.ObservationProbability> getObservationProbabilities(State state,
                                                                                     GroundedAction action)

Description copied from class: ObservationFunction

Returns the observation probability mass/density function for all observations that have non-zero mass/density conditioned on the true MDP state and previous action taken that led to the state. The function is represented as a List of ObservationFunction.ObservationProbability objects, which is a pair of an observation (represented by a State and double specifying its mass/density.

Specified by:

getObservationProbabilities in class ObservationFunction

Parameters:

state - the true MDP state that generated the observations

action - the action that led to the MDP state and which generated the observations.

Returns:

the observation probability mass/density function represented by a List of ObservationFunction.ObservationProbability objects.

observationLeft

protected State observationLeft()

Returns the observation of hearing the tiger behind the left door

Returns:

a State specifying the observation of hearing the tiger behind the left door

observationRight

protected State observationRight()

Returns the observation of hearing the tiger behind the right door

Returns:

a State specifying the observation of hearing the tiger behind the right door

observationReset

protected State observationReset()

Returns the observation of approaching a new pair of doors

Returns:

a State specifying the observation of approaching a new pair of doors

observationNothing

protected State observationNothing()

Returns the observation of hearing nothing; occurs when the do nothing action is selected

Returns:

a State specifying the observation of hearing nothing; occurs when the do nothing action is selected