de.lmu.ifi.dbs.elki.data.uncertain

Class SimpleGaussianContinuousUncertainObject

java.lang.Object

de.lmu.ifi.dbs.elki.data.uncertain.AbstractUncertainObject

de.lmu.ifi.dbs.elki.data.uncertain.SimpleGaussianContinuousUncertainObject

All Implemented Interfaces:

FeatureVector<Double>, SpatialComparable, UncertainObject

public class SimpleGaussianContinuousUncertainObject
extends AbstractUncertainObject

Gaussian model for uncertain objects, sampled from a 3-sigma bounding box. This model does not support covariance, but all distributions are axis-aligned. TODO: currently, only a 3 sigma bounding box is supported.

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	SimpleGaussianContinuousUncertainObject.Factory Factory class for this data type.

Field Summary

Fields

Modifier and Type	Field and Description
private static double	DIV Scaling factor from bounding box width to standard deviations.
static FeatureVector.Factory<SimpleGaussianContinuousUncertainObject,?>	FACTORY Vector factory.

Fields inherited from class de.lmu.ifi.dbs.elki.data.uncertain.AbstractUncertainObject

bounds, DEFAULT_TRY_LIMIT

Constructor Summary

Constructors

Constructor and Description
SimpleGaussianContinuousUncertainObject(SpatialComparable bounds) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
DoubleVector	drawSample(Random rand) Draw a random sampled instance.
DoubleVector	getCenterOfMass() Get the center of mass of the uncertain object.

Methods inherited from class de.lmu.ifi.dbs.elki.data.uncertain.AbstractUncertainObject

computeBounds, getDimensionality, getMax, getMin, getValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.data.FeatureVector

toString

Field Detail

FACTORY

public static final FeatureVector.Factory<SimpleGaussianContinuousUncertainObject,?> FACTORY

Vector factory.

DIV

private static final double DIV

Scaling factor from bounding box width to standard deviations. Bounding box is 6 standard deviations in width (three on each side)!

See Also:

Constant Field Values

Constructor Detail

SimpleGaussianContinuousUncertainObject

public SimpleGaussianContinuousUncertainObject(SpatialComparable bounds)

Constructor.

Parameters:

bounds - Bounding box (3 sigma)

Method Detail

getCenterOfMass

public DoubleVector getCenterOfMass()

Description copied from interface: UncertainObject

Get the center of mass of the uncertain object.

Specified by:

getCenterOfMass in interface UncertainObject

Specified by:

getCenterOfMass in class AbstractUncertainObject

Returns:

Center of mass.

drawSample

public DoubleVector drawSample(Random rand)

Description copied from interface: UncertainObject

Draw a random sampled instance.

Specified by:

drawSample in interface UncertainObject

Specified by:

drawSample in class AbstractUncertainObject

Parameters:

rand - Random generator

Returns:

Sampled object.