burlap.behavior.functionapproximation.sparse.tilecoding

Class Tiling

java.lang.Object

burlap.behavior.functionapproximation.sparse.tilecoding.Tiling

public class Tiling
extends java.lang.Object

This class provides a tiling of a provided feature vector. Unlike the Tiling class, this tiling method does not take OO-MDP states as input; instead states must first be converted into a feature vector and passed to this class. As a consequence, this tiling method is object identiferi *dependent*.

Author:

James MacGlashan

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Tiling.FVTile Stores a tiled version of a feature vector with a hashcode and equality comparions methods implemented.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean[]	dimensionMask The dimensions on which this tiling are dependent
protected double[]	offset The offset along each dimenision in the tiling
protected double[]	widths The width of each dimension in this tiling

Constructor Summary

Constructors

Constructor and Description
Tiling(double[] widths, double[] offset) Constructs a tiling using the given widths, offset of each dimension's tiling, and assuming the tiling is over all dimensions.
Tiling(double[] widths, double[] offset, boolean[] dimensionMask) Constructs a tiling using the given widths, offset of each dimension's tiling, and which dimensions are actually used in the tiling.

Method Summary

Modifier and Type	Method and Description
Tiling.FVTile	getFVTile(double[] input) Retunrs a tile for the given input vector.

Methods inherited from class java.lang.Object

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

Field Detail

widths

protected double[] widths

The width of each dimension in this tiling

offset

protected double[] offset

The offset along each dimenision in the tiling

dimensionMask

protected boolean[] dimensionMask

The dimensions on which this tiling are dependent

Constructor Detail

Tiling

public Tiling(double[] widths,
              double[] offset)

Constructs a tiling using the given widths, offset of each dimension's tiling, and assuming the tiling is over all dimensions.

Parameters:

widths - the widths of each dimension's tiling

offset - the offset of the tiling for each dimension (should be a faction of the width).

Tiling

public Tiling(double[] widths,
              double[] offset,
              boolean[] dimensionMask)

Constructs a tiling using the given widths, offset of each dimension's tiling, and which dimensions are actually used in the tiling.

Parameters:

widths - the widths of each dimension's tiling

offset - the offset of the tiling for each dimension (should be a faction of the width).

dimensionMask - specifies which dimensions are used in the tiling

Method Detail

getFVTile

public Tiling.FVTile getFVTile(double[] input)

Retunrs a tile for the given input vector. The input must be the same dimensionality as the specifications for this tiling.

Parameters:

input - the input vector to tile

Returns:

the tile of the input vector