edu.udo.cs.yale.operator.generator
Class SpiralClusteringFunction

java.lang.Object
  edu.udo.cs.yale.operator.generator.SpiralClusteringFunction

All Implemented Interfaces:

TargetFunction

public class SpiralClusteringFunction
extends java.lang.Object
implements TargetFunction

Generates a data set for two attributes. The data build two spiral functions around the origin up to a maximal radius.

Version:

$Id: SpiralClusteringFunction.java,v 1.3 2006/08/03 14:39:30 ingomierswa Exp $

Author:

Ingo Mierswa

Nested Class Summary

Nested classes/interfaces inherited from interface edu.udo.cs.yale.operator.generator.TargetFunction

TargetFunction.FunctionException

Field Summary

private static double	ANGLE_FACTOR The angle factor.
private static double	ANGLE_OFFSET The offset for the spiral angle.
private double	bound The maximal radius of the spiral.
private double	currentLabel The currently used label.
private int	currentNumber The current number.
private double	currentPhi The currently used angle phi.
private double	currentRadiusOffset The current radius factor.
private double	deltaPhi The angle delta which is added for each iteration.
(package private) Attribute	label The label attribute.
private static int	NUMBER_OF_TURNS The number of turns.
private static double	RADIUS_OFFSET The radius factor for the second spiral.
private int	totalNumber The maximal number of examples that will be created by this target function.

Constructor Summary

SpiralClusteringFunction()

Method Summary

double	calculate(double[] att) Calculates the target function on arguments.
double[]	createArguments(int number, RandomGenerator random) Creates and returns a number of arguments.
Attribute	getLabel() Returns the label attribute.
void	init(RandomGenerator random) Does nothing.
void	setLowerArgumentBound(double lower) Does nothing.
void	setTotalNumberOfAttributes(int number) Does nothing.
void	setTotalNumberOfExamples(int number) Sets the total number of examples.
void	setUpperArgumentBound(double upper) Does nothing.

Methods inherited from class java.lang.Object

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

Field Detail

NUMBER_OF_TURNS

private static final int NUMBER_OF_TURNS

The number of turns.

See Also:

Constant Field Values

ANGLE_OFFSET

private static final double ANGLE_OFFSET

The offset for the spiral angle.

See Also:

Constant Field Values

ANGLE_FACTOR

private static final double ANGLE_FACTOR

The angle factor.

See Also:

Constant Field Values

RADIUS_OFFSET

private static final double RADIUS_OFFSET

The radius factor for the second spiral.

See Also:

Constant Field Values

bound

private double bound

The maximal radius of the spiral.

totalNumber

private int totalNumber

The maximal number of examples that will be created by this target function.

currentNumber

private int currentNumber

The current number.

currentPhi

private double currentPhi

The currently used angle phi.

deltaPhi

private double deltaPhi

The angle delta which is added for each iteration.

currentRadiusOffset

private double currentRadiusOffset

The current radius factor.

currentLabel

private double currentLabel

The currently used label.

label

Attribute label

The label attribute.

Constructor Detail

SpiralClusteringFunction

public SpiralClusteringFunction()

Method Detail

init

public void init(RandomGenerator random)

Does nothing.

Specified by:

init in interface TargetFunction

setTotalNumberOfExamples

public void setTotalNumberOfExamples(int number)

Sets the total number of examples.

Specified by:

setTotalNumberOfExamples in interface TargetFunction

setTotalNumberOfAttributes

public void setTotalNumberOfAttributes(int number)

Does nothing.

Specified by:

setTotalNumberOfAttributes in interface TargetFunction

setLowerArgumentBound

public void setLowerArgumentBound(double lower)

Does nothing.

Specified by:

setLowerArgumentBound in interface TargetFunction

setUpperArgumentBound

public void setUpperArgumentBound(double upper)

Does nothing.

Specified by:

setUpperArgumentBound in interface TargetFunction

getLabel

public Attribute getLabel()

Description copied from interface: TargetFunction

Returns the label attribute.

Specified by:

getLabel in interface TargetFunction

calculate

public double calculate(double[] att)
                 throws TargetFunction.FunctionException

Description copied from interface: TargetFunction

Calculates the target function on arguments.

Specified by:

calculate in interface TargetFunction

Throws:

TargetFunction.FunctionException

createArguments

public double[] createArguments(int number,
                                RandomGenerator random)
                         throws TargetFunction.FunctionException

Description copied from interface: TargetFunction

Creates and returns a number of arguments.

Specified by:

createArguments in interface TargetFunction

Throws:

TargetFunction.FunctionException