weka.experiment
Class PairedCorrectedTTester

java.lang.Object
  weka.experiment.PairedTTester
      weka.experiment.PairedCorrectedTTester

All Implemented Interfaces:

java.io.Serializable, OptionHandler, TechnicalInformationHandler, Tester

public class PairedCorrectedTTester
extends PairedTTester
implements TechnicalInformationHandler

Behaves the same as PairedTTester, only it uses the corrected resampled t-test statistic.

For more information see:

Claude Nadeau, Yoshua Bengio (2001). Inference for the Generalization Error. Machine Learning..

BibTeX:

 @article{Nadeau2001,
    author = {Claude Nadeau and Yoshua Bengio},
    journal = {Machine Learning},
    title = {Inference for the Generalization Error},
    year = {2001},
    PDF = {http://www.iro.umontreal.ca/\~lisa/bib/pub_subject/comparative/pointeurs/nadeau_MLJ1597.pdf}
 }
 

Valid options are:

 -D <index,index2-index4,...>
  Specify list of columns that specify a unique
  dataset.
  First and last are valid indexes. (default none)

 -R <index>
  Set the index of the column containing the run number

 -F <index>
  Set the index of the column containing the fold number

 -G <index1,index2-index4,...>
  Specify list of columns that specify a unique
  'result generator' (eg: classifier name and options).
  First and last are valid indexes. (default none)

 -S <significance level>
  Set the significance level for comparisons (default 0.05)

 -V
  Show standard deviations

 -L
  Produce table comparisons in Latex table format

 -csv
  Produce table comparisons in CSV table format

 -html
  Produce table comparisons in HTML table format

 -significance
  Produce table comparisons with only the significance values

 -gnuplot
  Produce table comparisons output suitable for GNUPlot

Version:

$Revision: 1.12 $

Author:

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

See Also:

Serialized Form

Constructor Summary

PairedCorrectedTTester()

Method Summary

PairedStats	calculateStatistics(Instance datasetSpecifier, int resultset1Index, int resultset2Index, int comparisonColumn) Computes a paired t-test comparison for a specified dataset between two resultsets.
java.lang.String	getDisplayName() returns the name of the tester
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.
java.lang.String	getToolTipText() returns a string that is displayed as tooltip on the "perform test" button in the experimenter
static void	main(java.lang.String[] args) Test the class from the command line.

Methods inherited from class weka.experiment.PairedTTester

assign, displayResultset, getDatasetKeyColumns, getDisplayedResultsets, getFoldColumn, getInstances, getNumDatasets, getNumResultsets, getOptions, getResultMatrix, getResultsetKeyColumns, getResultsetName, getRunColumn, getShowStdDevs, getSignificanceLevel, getSortColumn, getSortColumnName, header, listOptions, multiResultsetFull, multiResultsetRanking, multiResultsetSummary, multiResultsetWins, resultsetKey, setDatasetKeyColumns, setDisplayedResultsets, setFoldColumn, setInstances, setOptions, setResultMatrix, setResultsetKeyColumns, setRunColumn, setShowStdDevs, setSignificanceLevel, setSortColumn

Methods inherited from class java.lang.Object

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

Constructor Detail

PairedCorrectedTTester

public PairedCorrectedTTester()

Method Detail

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

calculateStatistics

public PairedStats calculateStatistics(Instance datasetSpecifier,
                                       int resultset1Index,
                                       int resultset2Index,
                                       int comparisonColumn)
                                throws java.lang.Exception

Computes a paired t-test comparison for a specified dataset between two resultsets.

Specified by:

calculateStatistics in interface Tester

Overrides:

calculateStatistics in class PairedTTester

Parameters:

datasetSpecifier - the dataset specifier

resultset1Index - the index of the first resultset

resultset2Index - the index of the second resultset

comparisonColumn - the column containing values to compare

Returns:

the results of the paired comparison

Throws:

java.lang.Exception - if an error occurs

main

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

Test the class from the command line.

Parameters:

args - contains options for the instance ttests

getDisplayName

public java.lang.String getDisplayName()

returns the name of the tester

Specified by:

getDisplayName in interface Tester

Overrides:

getDisplayName in class PairedTTester

Returns:

the display name

getToolTipText

public java.lang.String getToolTipText()

returns a string that is displayed as tooltip on the "perform test" button in the experimenter

Specified by:

getToolTipText in interface Tester

Overrides:

getToolTipText in class PairedTTester

Returns:

the string for the tool tip