weka.clusterers
Class Cobweb

java.lang.Object
  |
  +--weka.clusterers.Clusterer
        |
        +--weka.clusterers.Cobweb

All Implemented Interfaces:

java.lang.Cloneable, OptionHandler, java.io.Serializable

public class Cobweb

extends Clusterer

implements OptionHandler

See Also:

Serialized Form

Constructor Summary

Cobweb()

Method Summary

void	add(weka.clusterers.Cobweb.CTree node, weka.clusterers.Cobweb.CTree tree) Adds an example to the tree.
weka.clusterers.Cobweb.CTree	bestHost(weka.clusterers.Cobweb.CTree tree, weka.clusterers.Cobweb.CTree node, double aU, double baseU) Finds the best place to add a new node during training.
weka.clusterers.Cobweb.CTree	bestHostCluster(weka.clusterers.Cobweb.CTree tree, weka.clusterers.Cobweb.CTree node, double aU, double baseU) Finds the cluster that an unseen instance belongs to.
void	buildClusterer(Instances data) Builds the clusterer.
int	clusterInstance(Instance instance) Clusters an instance.
int	getAcuity() get the accuity value
int	getCutoff() get the cutoff
java.lang.String[]	getOptions() Gets the current settings of Cobweb.
java.util.Enumeration	listOptions() Returns an enumeration describing the available options
static void	main(java.lang.String[] argv)
int	numberOfClusters() Returns the number of clusters.
void	setAcuity(int a) set the accuity.
void	setCutoff(int c) set the cutoff
void	setOptions(java.lang.String[] options) Parses a given list of options.
java.lang.String	toString() Returns a description of the clusterer as a string.

Methods inherited from class weka.clusterers.Clusterer

forName, makeCopies

Methods inherited from class java.lang.Object

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

Constructor Detail

Cobweb

public Cobweb()

Method Detail

buildClusterer

public void buildClusterer(Instances data)
                    throws java.lang.Exception

Builds the clusterer.

Overrides:

buildClusterer in class Clusterer

Parameters:

data - the training instances.

Throws:

java.lang.Exception - if something goes wrong.

numberOfClusters

public int numberOfClusters()
                     throws java.lang.Exception

Returns the number of clusters.

Overrides:

numberOfClusters in class Clusterer

Throws:

java.lang.Exception - if something goes wrong.

clusterInstance

public int clusterInstance(Instance instance)
                    throws java.lang.Exception

Clusters an instance.

Overrides:

clusterInstance in class Clusterer

Parameters:

instance - the instance to cluster.

Throws:

java.lang.Exception - if something goes wrong.

add

public void add(weka.clusterers.Cobweb.CTree node,
                weka.clusterers.Cobweb.CTree tree)
         throws java.lang.Exception

Adds an example to the tree.

Parameters:

node - the node to be added.

tree - the tree.

Throws:

java.lang.Exception - if something goes wrong.

bestHostCluster

public weka.clusterers.Cobweb.CTree bestHostCluster(weka.clusterers.Cobweb.CTree tree,
                                                    weka.clusterers.Cobweb.CTree node,
                                                    double aU,
                                                    double baseU)
                                             throws java.lang.Exception

Finds the cluster that an unseen instance belongs to.

Parameters:

tree - the tree.

node - the node to be added.

aU - ??

baseU - ??

Throws:

java.lang.Exception - if something goes wrong.

bestHost

public weka.clusterers.Cobweb.CTree bestHost(weka.clusterers.Cobweb.CTree tree,
                                             weka.clusterers.Cobweb.CTree node,
                                             double aU,
                                             double baseU)
                                      throws java.lang.Exception

Finds the best place to add a new node during training.

Parameters:

tree - the tree.

node - the node to be added.

aU - ??

baseU - ??

Throws:

java.lang.Exception - if something goes wrong.

toString

public java.lang.String toString()

Returns a description of the clusterer as a string.

Overrides:

toString in class java.lang.Object

Returns:

a string describing the clusterer.

listOptions

public java.util.Enumeration listOptions()

Returns an enumeration describing the available options

Specified by:

listOptions in interface OptionHandler

Returns:

an enumeration of all the available options

setOptions

public void setOptions(java.lang.String[] options)
                throws java.lang.Exception

Parses a given list of options. Valid options are:

-A <0-100>
Acuity.

-C <0-100>
Cutoff.

Specified by:

setOptions in interface OptionHandler

Parameters:

options - the list of options as an array of strings

Throws:

java.lang.Exception - if an option is not supported

setAcuity

public void setAcuity(int a)

set the accuity.

Parameters:

a - the accuity between 0 and 100

getAcuity

public int getAcuity()

get the accuity value

Returns:

the accuity as a value between 0 and 100

setCutoff

public void setCutoff(int c)

set the cutoff

Parameters:

c - the cutoff between 0 and 100

getCutoff

public int getCutoff()

get the cutoff

Returns:

the cutoff as a value between 1 and 100\

getOptions

public java.lang.String[] getOptions()

Gets the current settings of Cobweb.

Specified by:

getOptions in interface OptionHandler

Returns:

an array of strings suitable for passing to setOptions()

main

public static void main(java.lang.String[] argv)