Class RouletteWheelExploration

Roulette wheel exploration policy.
Inheritance
System.Object
RouletteWheelExploration
Implements
Namespace: Mars.Components.Services.Explorations
Assembly: Mars.Components.dll
Syntax
public class RouletteWheelExploration : object, IExplorationPolicy
Remarks

The class implements roulette wheel exploration policy. According to the policy, action a at state s is selected with the next probability: 

              Q( s, a )
p( s, a ) = ------------------
         SUM( Q( s, b ) )
          b

where Q(s, a) is action's a estimation (usefulness) at state s.

note

The exploration policy may be applied only in cases, when action estimates (usefulness) are represented with positive value greater then 0.

Methods

ChooseAction(Double[])

Choose an action.
Declaration
public int ChooseAction(double[] actionEstimates)
Parameters
Type Name Description
System.Double[] actionEstimates Action estimates.
Returns
Type Description
System.Int32 Returns selected action.
Remarks
The method chooses an action depending on the provided estimates. The estimates can be any sort of estimate, which values usefulness of the action (expected summary reward, discounted reward, etc).

Implements

See Also