weka.filters.unsupervised.attribute

Class PKIDiscretize

java.lang.Object

weka.filters.Filter

weka.filters.unsupervised.attribute.PotentialClassIgnorer

weka.filters.unsupervised.attribute.Discretize

weka.filters.unsupervised.attribute.PKIDiscretize

All Implemented Interfaces:

java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, TechnicalInformationHandler, WeightedInstancesHandler, UnsupervisedFilter

public class PKIDiscretize
extends Discretize
implements TechnicalInformationHandler

Discretizes numeric attributes using equal frequency binning, where the number of bins is equal to the square root of the number of non-missing values.

For more information, see:

Ying Yang, Geoffrey I. Webb: Proportional k-Interval Discretization for Naive-Bayes Classifiers. In: 12th European Conference on Machine Learning, 564-575, 2001.

BibTeX:

 @inproceedings{Yang2001,
    author = {Ying Yang and Geoffrey I. Webb},
    booktitle = {12th European Conference on Machine Learning},
    pages = {564-575},
    publisher = {Springer},
    series = {LNCS},
    title = {Proportional k-Interval Discretization for Naive-Bayes Classifiers},
    volume = {2167},
    year = {2001}
 }
 

Valid options are:

 -unset-class-temporarily
  Unsets the class index temporarily before the filter is
  applied to the data.
  (default: no)

 -R <col1,col2-col4,...>
  Specifies list of columns to Discretize. First and last are valid indexes.
  (default: first-last)

 -V
  Invert matching sense of column indexes.

 -D
  Output binary attributes for discretized attributes.

Version:

$Revision: 1.9 $

Author:

Richard Kirkby (rkirkby@cs.waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PKIDiscretize()

Method Summary

Modifier and Type	Method and Description
java.lang.String	binsTipText() Returns the tip text for this property
java.lang.String	findNumBinsTipText() Returns the tip text for this property
int	getBins() Ignored
boolean	getFindNumBins() Get the value of FindNumBins.
java.lang.String[]	getOptions() Gets the current settings of the filter.
java.lang.String	getRevision() Returns the revision string.
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.
boolean	getUseEqualFrequency() Get the value of UseEqualFrequency.
java.lang.String	globalInfo() Returns a string describing this filter
java.util.Enumeration	listOptions() Gets an enumeration describing the available options.
static void	main(java.lang.String[] argv) Main method for testing this class.
void	setBins(int numBins) Ignored
void	setFindNumBins(boolean newFindNumBins) Set the value of FindNumBins.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.
void	setOptions(java.lang.String[] options) Parses a given list of options.
void	setUseEqualFrequency(boolean newUseEqualFrequency) Set the value of UseEqualFrequency.
java.lang.String	useEqualFrequencyTipText() Returns the tip text for this property

Methods inherited from class weka.filters.unsupervised.attribute.Discretize

attributeIndicesTipText, batchFinished, desiredWeightOfInstancesPerIntervalTipText, getAttributeIndices, getCapabilities, getCutPoints, getDesiredWeightOfInstancesPerInterval, getInvertSelection, getMakeBinary, input, invertSelectionTipText, makeBinaryTipText, setAttributeIndices, setAttributeIndicesArray, setDesiredWeightOfInstancesPerInterval, setInvertSelection, setMakeBinary

Methods inherited from class weka.filters.unsupervised.attribute.PotentialClassIgnorer

getIgnoreClass, getOutputFormat, ignoreClassTipText, setIgnoreClass

Methods inherited from class weka.filters.Filter

batchFilterFile, filterFile, getCapabilities, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper

Methods inherited from class java.lang.Object

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

Constructor Detail

PKIDiscretize

public PKIDiscretize()

Method Detail

setInputFormat

public boolean setInputFormat(Instances instanceInfo)
                       throws java.lang.Exception

Sets the format of the input instances.

Overrides:

setInputFormat in class Discretize

Parameters:

instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).

Returns:

true if the outputFormat may be collected immediately

Throws:

java.lang.Exception - if the input format can't be set successfully

listOptions

public java.util.Enumeration listOptions()

Gets an enumeration describing the available options.

Specified by:

listOptions in interface OptionHandler

Overrides:

listOptions in class Discretize

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:

 -unset-class-temporarily
  Unsets the class index temporarily before the filter is
  applied to the data.
  (default: no)

 -R <col1,col2-col4,...>
  Specifies list of columns to Discretize. First and last are valid indexes.
  (default: first-last)

 -V
  Invert matching sense of column indexes.

 -D
  Output binary attributes for discretized attributes.

Specified by:

setOptions in interface OptionHandler

Overrides:

setOptions in class Discretize

Parameters:

options - the list of options as an array of strings

Throws:

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

getOptions

public java.lang.String[] getOptions()

Gets the current settings of the filter.

Specified by:

getOptions in interface OptionHandler

Overrides:

getOptions in class Discretize

Returns:

an array of strings suitable for passing to setOptions

globalInfo

public java.lang.String globalInfo()

Returns a string describing this filter

Overrides:

globalInfo in class Discretize

Returns:

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

getTechnicalInformation

public 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 TechnicalInformationHandler

Returns:

the technical information about this class

findNumBinsTipText

public java.lang.String findNumBinsTipText()

Returns the tip text for this property

Overrides:

findNumBinsTipText in class Discretize

Returns:

tip text for this property suitable for displaying in the explorer/experimenter gui

getFindNumBins

public boolean getFindNumBins()

Get the value of FindNumBins.

Overrides:

getFindNumBins in class Discretize

Returns:

Value of FindNumBins.

setFindNumBins

public void setFindNumBins(boolean newFindNumBins)

Set the value of FindNumBins.

Overrides:

setFindNumBins in class Discretize

Parameters:

newFindNumBins - Value to assign to FindNumBins.

useEqualFrequencyTipText

public java.lang.String useEqualFrequencyTipText()

Returns the tip text for this property

Overrides:

useEqualFrequencyTipText in class Discretize

Returns:

tip text for this property suitable for displaying in the explorer/experimenter gui

getUseEqualFrequency

public boolean getUseEqualFrequency()

Get the value of UseEqualFrequency.

Overrides:

getUseEqualFrequency in class Discretize

Returns:

Value of UseEqualFrequency.

setUseEqualFrequency

public void setUseEqualFrequency(boolean newUseEqualFrequency)

Set the value of UseEqualFrequency.

Overrides:

setUseEqualFrequency in class Discretize

Parameters:

newUseEqualFrequency - Value to assign to UseEqualFrequency.

binsTipText

public java.lang.String binsTipText()

Returns the tip text for this property

Overrides:

binsTipText in class Discretize

Returns:

tip text for this property suitable for displaying in the explorer/experimenter gui

getBins

public int getBins()

Ignored

Overrides:

getBins in class Discretize

Returns:

the number of bins.

setBins

public void setBins(int numBins)

Ignored

Overrides:

setBins in class Discretize

Parameters:

numBins - the number of bins

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Overrides:

getRevision in class Discretize

Returns:

the revision

main

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

Main method for testing this class.

Parameters:

argv - should contain arguments to the filter: use -h for help