weka.attributeSelection
Class OneRAttributeEval

java.lang.Object
  |
  +--weka.attributeSelection.ASEvaluation
        |
        +--weka.attributeSelection.AttributeEvaluator
              |
              +--weka.attributeSelection.OneRAttributeEval

All Implemented Interfaces:

java.io.Serializable

public class OneRAttributeEval

extends AttributeEvaluator

Class for Evaluating attributes individually by using the OneR classifier.

No options.

Author:

Mark Hall (mhall@cs.waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

OneRAttributeEval()
Constructor

Method Summary

void	buildEvaluator(Instances data) Initializes an information gain attribute evaluator.
double	evaluateAttribute(int attribute) evaluates an individual attribute by measuring the amount of information gained about the class given the attribute.
java.lang.String	globalInfo() Returns a string describing this attribute evaluator
static void	main(java.lang.String[] args) Main method for testing this class.
protected void	resetOptions() rests to defaults.
java.lang.String	toString() Return a description of the evaluator

Methods inherited from class weka.attributeSelection.ASEvaluation

forName, makeCopies, postProcess

Methods inherited from class java.lang.Object

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

Constructor Detail

OneRAttributeEval

public OneRAttributeEval()

Constructor

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this attribute evaluator

Returns:

a description of the evaluator suitable for displaying in the explorer/experimenter gui

buildEvaluator

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

Initializes an information gain attribute evaluator. Discretizes all attributes that are numeric.

Overrides:

buildEvaluator in class ASEvaluation

Parameters:

data - set of instances serving as training data

Throws:

java.lang.Exception - if the evaluator has not been generated successfully

resetOptions

protected void resetOptions()

rests to defaults.

evaluateAttribute

public double evaluateAttribute(int attribute)
                         throws java.lang.Exception

evaluates an individual attribute by measuring the amount of information gained about the class given the attribute.

Overrides:

evaluateAttribute in class AttributeEvaluator

Parameters:

attribute - the index of the attribute to be evaluated

Throws:

java.lang.Exception - if the attribute could not be evaluated

toString

public java.lang.String toString()

Return a description of the evaluator

Overrides:

toString in class java.lang.Object

Returns:

description as a string

main

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

Main method for testing this class.

Parameters:

args - the options