burlap.mdp.singleagent.pomdp.beliefstate

Interface BeliefState

All Superinterfaces:

State

All Known Subinterfaces:

DenseBeliefVector, EnumerableBeliefState

All Known Implementing Classes:

TabularBeliefState

public interface BeliefState
extends State

An interface for defining a belief state, which is a probability distribution over states. This interface does not require enumerating all states, because it is possible to have a belief state over an infinite number of MDP states. However, it does require that the probability density function for a specified state be returnable from the (belief(State), method and to be able to sample an MDP state from the belief distribution with sample().

Author:

James MacGlashan and Nakul Gopalan

Method Summary

Modifier and Type	Method and Description
double	belief(State s) Returns the probability density/mass for the input MDP state.
State	sample() Samples an MDP state state from this belief distribution.

Methods inherited from interface burlap.mdp.core.state.State

copy, get, variableKeys

Method Detail

belief

double belief(State s)

Returns the probability density/mass for the input MDP state.

Parameters:

s - the the input MDP state defined by a State instance.

Returns:

the probability density/mass of the input MDP state in this belief distribution.

sample

State sample()

Samples an MDP state state from this belief distribution.

Returns:

an MDP state defined by a State instance.