weka.classifiers.rules
Class Prism

java.lang.Object
  weka.classifiers.AbstractClassifier
      weka.classifiers.rules.Prism

All Implemented Interfaces:

Serializable, Cloneable, weka.classifiers.Classifier, weka.core.CapabilitiesHandler, weka.core.OptionHandler, weka.core.RevisionHandler, weka.core.TechnicalInformationHandler

public class Prism
extends weka.classifiers.AbstractClassifier
implements weka.core.TechnicalInformationHandler

Class for building and using a PRISM rule set for classification. Can only deal with nominal attributes. Can't deal with missing values. Doesn't do any pruning.

For more information, see

J. Cendrowska (1987). PRISM: An algorithm for inducing modular rules. International Journal of Man-Machine Studies. 27(4):349-370.

BibTeX:

 @article{Cendrowska1987,
    author = {J. Cendrowska},
    journal = {International Journal of Man-Machine Studies},
    number = {4},
    pages = {349-370},
    title = {PRISM: An algorithm for inducing modular rules},
    volume = {27},
    year = {1987}
 }
 

Valid options are:

 -D
  If set, classifier is run in debug mode and
  may output additional info to the console

Version:

$Revision: 8109 $

Author:

Ian H. Witten (ihw@cs.waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

Prism()

Method Summary

void	buildClassifier(weka.core.Instances data) Generates the classifier.
double	classifyInstance(weka.core.Instance inst) Classifies a given instance.
weka.core.Capabilities	getCapabilities() Returns default capabilities of the classifier.
String	getRevision() Returns the revision string.
weka.core.TechnicalInformation	getTechnicalInformation() Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
String	globalInfo() Returns a string describing classifier
static void	main(String[] args) Main method for testing this class
String	toString() Prints a description of the classifier.

Methods inherited from class weka.classifiers.AbstractClassifier

debugTipText, distributionForInstance, forName, getDebug, getOptions, listOptions, makeCopies, makeCopy, runClassifier, setDebug, setOptions

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Prism

public Prism()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing classifier

Returns:

a description suitable for displaying in the explorer/experimenter gui

getTechnicalInformation

public weka.core.TechnicalInformation getTechnicalInformation()

Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.

Specified by:

getTechnicalInformation in interface weka.core.TechnicalInformationHandler

Returns:

the technical information about this class

classifyInstance

public double classifyInstance(weka.core.Instance inst)

Classifies a given instance.

Specified by:

classifyInstance in interface weka.classifiers.Classifier

Overrides:

classifyInstance in class weka.classifiers.AbstractClassifier

Parameters:

inst - the instance to be classified

Returns:

the classification

getCapabilities

public weka.core.Capabilities getCapabilities()

Returns default capabilities of the classifier.

Specified by:

getCapabilities in interface weka.classifiers.Classifier

Specified by:

getCapabilities in interface weka.core.CapabilitiesHandler

Overrides:

getCapabilities in class weka.classifiers.AbstractClassifier

Returns:

the capabilities of this classifier

buildClassifier

public void buildClassifier(weka.core.Instances data)
                     throws Exception

Generates the classifier.

Specified by:

buildClassifier in interface weka.classifiers.Classifier

Parameters:

data - the data to be used

Throws:

Exception - if the classifier can't built successfully

toString

public String toString()

Prints a description of the classifier.

Overrides:

toString in class Object

Returns:

a description of the classifier as a string

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface weka.core.RevisionHandler

Overrides:

getRevision in class weka.classifiers.AbstractClassifier

Returns:

the revision

main

public static void main(String[] args)

Main method for testing this class

Parameters:

args - the commandline parameters