weka.filters.unsupervised.attribute

Class RandomSubset

java.lang.Object

weka.filters.Filter

weka.filters.SimpleFilter

weka.filters.SimpleStreamFilter

weka.filters.unsupervised.attribute.RandomSubset

All Implemented Interfaces:

java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, StreamableFilter

public class RandomSubset
extends SimpleStreamFilter

Chooses a random subset of attributes, either an absolute number or a percentage. The class is always included in the output (as the last attribute).

Valid options are:

 -D
  Turns on output of debugging information.

 -N <double>
  The number of attributes to randomly select.
  If < 1 then percentage, >= 1 absolute number.
  (default: 0.5)

 -S <int>
  The seed value.
  (default: 1)

Version:

$Revision: 5547 $

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RandomSubset()

Method Summary

Modifier and Type	Method and Description
Capabilities	getCapabilities() Returns the Capabilities of this filter.
double	getNumAttributes() Get the number of attributes (< 1 percentage, >= 1 absolute number).
java.lang.String[]	getOptions() Gets the current settings of the filter.
java.lang.String	getRevision() Returns the revision string.
int	getSeed() Get the seed value for the random number generator.
java.lang.String	globalInfo() Returns a string describing this filter.
java.util.Enumeration	listOptions() Returns an enumeration describing the available options.
static void	main(java.lang.String[] args) Runs the filter with the given parameters.
java.lang.String	numAttributesTipText() Returns the tip text for this property.
java.lang.String	seedTipText() Returns the tip text for this property.
void	setNumAttributes(double value) Set the number of attributes.
void	setOptions(java.lang.String[] options) Parses a given list of options.
void	setSeed(int value) Set the seed value for the random number generator.

Methods inherited from class weka.filters.SimpleStreamFilter

batchFinished, input

Methods inherited from class weka.filters.SimpleFilter

debugTipText, getDebug, setDebug, setInputFormat

Methods inherited from class weka.filters.Filter

batchFilterFile, filterFile, getCapabilities, getOutputFormat, 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

RandomSubset

public RandomSubset()

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this filter.

Specified by:

globalInfo in class SimpleFilter

Returns:

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

listOptions

public java.util.Enumeration listOptions()

Returns an enumeration describing the available options.

Specified by:

listOptions in interface OptionHandler

Overrides:

listOptions in class SimpleFilter

Returns:

an enumeration of all the available options.

getOptions

public java.lang.String[] getOptions()

Gets the current settings of the filter.

Specified by:

getOptions in interface OptionHandler

Overrides:

getOptions in class SimpleFilter

Returns:

an array of strings suitable for passing to setOptions

setOptions

public void setOptions(java.lang.String[] options)
                throws java.lang.Exception

Parses a given list of options.

Valid options are:

 -D
  Turns on output of debugging information.

 -N <double>
  The number of attributes to randomly select.
  If < 1 then percentage, >= 1 absolute number.
  (default: 0.5)

 -S <int>
  The seed value.
  (default: 1)

Specified by:

setOptions in interface OptionHandler

Overrides:

setOptions in class SimpleFilter

Parameters:

options - the list of options as an array of strings

Throws:

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

See Also:

SimpleFilter.reset()

numAttributesTipText

public java.lang.String numAttributesTipText()

Returns the tip text for this property.

Returns:

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

getNumAttributes

public double getNumAttributes()

Get the number of attributes (< 1 percentage, >= 1 absolute number).

Returns:

the number of attributes.

setNumAttributes

public void setNumAttributes(double value)

Set the number of attributes.

Parameters:

value - the number of attributes to use.

seedTipText

public java.lang.String seedTipText()

Returns the tip text for this property.

Returns:

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

getSeed

public int getSeed()

Get the seed value for the random number generator.

Returns:

the seed value.

setSeed

public void setSeed(int value)

Set the seed value for the random number generator.

Parameters:

value - the seed value.

getCapabilities

public Capabilities getCapabilities()

Returns the Capabilities of this filter.

Specified by:

getCapabilities in interface CapabilitiesHandler

Overrides:

getCapabilities in class Filter

Returns:

the capabilities of this object

See Also:

Capabilities

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Overrides:

getRevision in class Filter

Returns:

the revision

main

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

Runs the filter with the given parameters. Use -h to list options.

Parameters:

args - the commandline options