weka.classifiers.rules
Class Prism

java.lang.Object
  |
  +--weka.classifiers.Classifier
        |
        +--weka.classifiers.rules.Prism

All Implemented Interfaces:

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

public class Prism

extends Classifier

Class for building and using a PRISM rule set for classifcation. 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. Vol.27, No.4, pp.349-370.

Version:

$Revision: 1.16 $

Author:

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

See Also:

Serialized Form

Constructor Summary

Prism()

Method Summary

void	buildClassifier(Instances data) Generates the classifier.
double	classifyInstance(Instance inst) Classifies a given instance.
java.lang.String	globalInfo() Returns a string describing classifier
static void	main(java.lang.String[] args) Main method for testing this class
java.lang.String	toString() Prints a description of the classifier.

Methods inherited from class weka.classifiers.Classifier

debugTipText, distributionForInstance, forName, getDebug, getOptions, listOptions, makeCopies, 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 java.lang.String globalInfo()

Returns a string describing classifier

Returns:

a description suitable for displaying in the explorer/experimenter gui

classifyInstance

public double classifyInstance(Instance inst)

Classifies a given instance.

Overrides:

classifyInstance in class Classifier

Parameters:

inst - the instance to be classified

Returns:

the classification

buildClassifier

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

Generates the classifier.

Specified by:

buildClassifier in class Classifier

Parameters:

data - the data to be used

Throws:

java.lang.Exception - if the classifier can't built successfully

toString

public java.lang.String toString()

Prints a description of the classifier.

Overrides:

toString in class java.lang.Object

Returns:

a description of the classifier as a string

main

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

Main method for testing this class