weka.attributeSelection
Class ConsistencySubsetEval

java.lang.Object
  |
  +--weka.attributeSelection.ASEvaluation
        |
        +--weka.attributeSelection.SubsetEvaluator
              |
              +--weka.attributeSelection.ConsistencySubsetEval

All Implemented Interfaces:

java.io.Serializable

public class ConsistencySubsetEval

extends SubsetEvaluator

Consistency attribute subset evaluator.

For more information see:
Liu, H., and Setiono, R., (1996). A probabilistic approach to feature selection - A filter solution. In 13th International Conference on Machine Learning (ICML'96), July 1996, pp. 319-327. Bari, Italy.

Version:

$Revision: 1.10 $

Author:

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

See Also:

Serialized Form

Nested Class Summary

class

ConsistencySubsetEval.hashKey Class providing keys to the hash table.

Constructor Summary

ConsistencySubsetEval()
Constructor.

Method Summary

void	buildEvaluator(Instances data) Generates a attribute evaluator.
double	evaluateSubset(java.util.BitSet subset) Evaluates a subset of attributes
java.lang.String	globalInfo() Returns a string describing this search method
static void	main(java.lang.String[] args) Main method for testing this class.
java.lang.String	toString() returns a description of the evaluator

Methods inherited from class weka.attributeSelection.ASEvaluation

forName, makeCopies, postProcess

Methods inherited from class java.lang.Object

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

Constructor Detail

ConsistencySubsetEval

public ConsistencySubsetEval()

Constructor. Calls restOptions to set default options

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this search method

Returns:

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

buildEvaluator

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

Generates a attribute evaluator. Has to initialize all fields of the evaluator that are not being set via options.

Specified by:

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

evaluateSubset

public double evaluateSubset(java.util.BitSet subset)
                      throws java.lang.Exception

Evaluates a subset of attributes

Specified by:

evaluateSubset in class SubsetEvaluator

Parameters:

subset - a bitset representing the attribute subset to be evaluated

Returns:

the "merit" of the subset

Throws:

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

toString

public java.lang.String toString()

returns a description of the evaluator

Overrides:

toString in class java.lang.Object

Returns:

a description of the evaluator as a String.

main

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

Main method for testing this class.

Parameters:

args - the options