ambit2.domain.stats.transforms.densityestimation

Class KDensityMD

java.lang.Object

ambit2.domain.stats.transforms.densityestimation.KDensityMD

All Implemented Interfaces:

DrawableDensity, HighestDensityRegions

Direct Known Subclasses:

KDensityMDProduct

public abstract class KDensityMD
extends Object
implements HighestDensityRegions, DrawableDensity

Multivariate kernel density estimation

Author:

Nina Jeliazkova
Modified 2005-4-7

Field Summary

Fields

Modifier and Type	Field and Description
protected double[]	FDescriptorsImportance
protected int[]	FImportantFactors
protected boolean	FIsEnabled
protected int	FNumberOfFactors
protected int	FNumberOfImportantFactors

Constructor Summary

Constructors

Constructor and Description
KDensityMD(int number) MVDE class constructor

Method Summary

Modifier and Type	Method and Description
void	AssignHPDLevels(double[][] m) AssignHPDLevels HighestDensityRegions interface
void	AssignHPDLevels(int numberOfLevels) AssignHPDLevels HighestDensityRegions interface
boolean	EstimateDensityFromData(Jama.Matrix points, TransformFilter filter) EstimateDensityFromData Estimates density from set of points If filter is not null, then density in transformed space is estimated
Jama.Matrix	get2DgridPoints(int[] xnumbers, double[] xmin, double[] xmax, double[] currentPoint, int GridResolution) get2DGridPoints
double[]	getAmplitude(Jama.Matrix points)
double[]	getCoverageValues(Jama.Matrix points) getCoverageValues calculates Highest Density Region of a set of points
double[]	getDensityValues(Jama.Matrix points) points for which density values are to be calculated points for which density values are to be calculated
int[]	getHPDCounters() getHPDCounters() HighestDensityRegions interface
double	getHPDLevelsError(int index) getHPDLevelsError() HighestDensityRegions interface
abstract void	getMostDenseVector(double[] p) getmostDenseVector
boolean	Grid2ContourGrid(double[] grid) Grid2ContourGrid uses precalculated MultivariateHPDLevels to store HPD values for each grid cell
boolean	HPDBySorting(Jama.Matrix points) HighestDensityRegions interface
abstract double	maxAmplitude() MaxAmplitude
double[]	to1DGrid(int[] xnumbers, double[] xmin, double[] xmax, double[] currentPoint, int GridResolution) to1dGrid DrawableDensity interface this is general solution, write more efficient one in the subclass
double[]	to1DGridUnfiltered(int[] xnumbers, double[] xmin, double[] xmax, double[] currentPoint, int GridResolution) Deprecated. to1DGridUnfiltered Density Drawable interface
double[]	to2DGrid(int[] xnumbers, double[] xmin, double[] xmax, double[] currentPoint, int GridResolution) to2DGrid Density Drawable interface
double[]	to2DGridUnfiltered(int[] xnumbers, double[] xmin, double[] xmax, double[] currentPoint, int GridResolution) to2DGridUnfiltered Density Drawable interface
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

FNumberOfFactors

protected int FNumberOfFactors

FNumberOfImportantFactors

protected int FNumberOfImportantFactors

FImportantFactors

protected int[] FImportantFactors

FDescriptorsImportance

protected double[] FDescriptorsImportance

FIsEnabled

protected boolean FIsEnabled

Constructor Detail

KDensityMD

public KDensityMD(int number)

MVDE class constructor

Parameters:

number - the number of descriptors (dimensionality of the descriptor space)

Method Detail

maxAmplitude

public abstract double maxAmplitude()

MaxAmplitude

Returns:

maximum probability value over all defined range

getAmplitude

public double[] getAmplitude(Jama.Matrix points)

Parameters:

points -

Returns:

double[]

EstimateDensityFromData

public boolean EstimateDensityFromData(Jama.Matrix points,
                                       TransformFilter filter)

EstimateDensityFromData Estimates density from set of points If filter is not null, then density in transformed space is estimated

Parameters:

points -

filter -

Returns:

true on success

getDensityValues

public double[] getDensityValues(Jama.Matrix points)

points for which density values are to be calculated points for which density values are to be calculated

Parameters:

points -

Returns:

density values

getCoverageValues

public double[] getCoverageValues(Jama.Matrix points)

getCoverageValues calculates Highest Density Region of a set of points

Parameters:

points -

Returns:

calculated coverage values for each point

getMostDenseVector

public abstract void getMostDenseVector(double[] p)

getmostDenseVector

Parameters:

p - return parameter, contains point for which density value is maximum

toString

public String toString()

Overrides:

toString in class Object

Grid2ContourGrid

public boolean Grid2ContourGrid(double[] grid)

Grid2ContourGrid uses precalculated MultivariateHPDLevels to store HPD values for each grid cell

Parameters:

grid - contains density values on input, HPD values on output

Returns:

true if successful

AssignHPDLevels

public void AssignHPDLevels(double[][] m)

AssignHPDLevels HighestDensityRegions interface

Specified by:

AssignHPDLevels in interface HighestDensityRegions

AssignHPDLevels

public void AssignHPDLevels(int numberOfLevels)

AssignHPDLevels HighestDensityRegions interface

Specified by:

AssignHPDLevels in interface HighestDensityRegions

Parameters:

numberOfLevels -

getHPDCounters

public int[] getHPDCounters()

getHPDCounters() HighestDensityRegions interface

Specified by:

getHPDCounters in interface HighestDensityRegions

Returns:

int[]

getHPDLevelsError

public double getHPDLevelsError(int index)

getHPDLevelsError() HighestDensityRegions interface

Specified by:

getHPDLevelsError in interface HighestDensityRegions

Parameters:

index -

Returns:

double

HPDBySorting

public boolean HPDBySorting(Jama.Matrix points)

HighestDensityRegions interface

Specified by:

HPDBySorting in interface HighestDensityRegions

Parameters:

points -

Returns:

true if successful

to1DGrid

public double[] to1DGrid(int[] xnumbers,
                         double[] xmin,
                         double[] xmax,
                         double[] currentPoint,
                         int GridResolution)

to1dGrid DrawableDensity interface this is general solution, write more efficient one in the subclass

Specified by:

to1DGrid in interface DrawableDensity

Parameters:

xnumbers -

xmin -

xmax -

currentPoint -

GridResolution -

Returns:

array of doubles, representing 1D density within range (xmin,xmax)

to1DGridUnfiltered

public double[] to1DGridUnfiltered(int[] xnumbers,
                                   double[] xmin,
                                   double[] xmax,
                                   double[] currentPoint,
                                   int GridResolution)

Deprecated. to1DGridUnfiltered Density Drawable interface

Specified by:

to1DGridUnfiltered in interface DrawableDensity

Parameters:

xnumbers -

xmin -

xmax -

currentPoint -

GridResolution -

Returns:

double[]

get2DgridPoints

public Jama.Matrix get2DgridPoints(int[] xnumbers,
                                   double[] xmin,
                                   double[] xmax,
                                   double[] currentPoint,
                                   int GridResolution)

get2DGridPoints

Parameters:

xnumbers -

xmin -

xmax -

currentPoint -

GridResolution -

Returns:

Matrix

to2DGrid

public double[] to2DGrid(int[] xnumbers,
                         double[] xmin,
                         double[] xmax,
                         double[] currentPoint,
                         int GridResolution)

to2DGrid Density Drawable interface

Specified by:

to2DGrid in interface DrawableDensity

Parameters:

xnumbers -

xmin -

xmax -

currentPoint -

GridResolution -

Returns:

2d array packed by nPoints

to2DGridUnfiltered

public double[] to2DGridUnfiltered(int[] xnumbers,
                                   double[] xmin,
                                   double[] xmax,
                                   double[] currentPoint,
                                   int GridResolution)

to2DGridUnfiltered Density Drawable interface

Specified by:

to2DGridUnfiltered in interface DrawableDensity

Parameters:

xnumbers -

xmin -

xmax -

currentPoint -

GridResolution -

Returns:

double[]