weka.filters.unsupervised.attribute

Class MergeTwoValues

java.lang.Object

weka.filters.Filter

weka.filters.unsupervised.attribute.MergeTwoValues

All Implemented Interfaces:

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

public class MergeTwoValues
extends Filter
implements UnsupervisedFilter, StreamableFilter, OptionHandler

Merges two values of a nominal attribute into one value.

Valid options are:

 -C <col>
  Sets the attribute index (default last).

 -F <value index>
  Sets the first value's index (default first).

 -S <value index>
  Sets the second value's index (default last).

Version:

$Revision: 8289 $

Author:

Eibe Frank (eibe@cs.waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MergeTwoValues()

Method Summary

Modifier and Type	Method and Description
java.lang.String	attributeIndexTipText()
java.lang.String	firstValueIndexTipText()
java.lang.String	getAttributeIndex() Get the index of the attribute used.
Capabilities	getCapabilities() Returns the Capabilities of this filter.
java.lang.String	getFirstValueIndex() Get the index of the first value used.
java.lang.String[]	getOptions() Gets the current settings of the filter.
java.lang.String	getRevision() Returns the revision string.
java.lang.String	getSecondValueIndex() Get the index of the second value used.
java.lang.String	globalInfo() Returns a string describing this filter
boolean	input(Instance instance) Input an instance for filtering.
java.util.Enumeration	listOptions() Returns an enumeration describing the available options.
static void	main(java.lang.String[] argv) Main method for testing this class.
java.lang.String	secondValueIndexTipText()
void	setAttributeIndex(java.lang.String attIndex) Sets index of the attribute used.
void	setFirstValueIndex(java.lang.String firstIndex) Sets index of the first value used.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.
void	setOptions(java.lang.String[] options) Parses a given list of options.
void	setSecondValueIndex(java.lang.String secondIndex) Sets index of the second value used.

Methods inherited from class weka.filters.Filter

batchFilterFile, batchFinished, 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

MergeTwoValues

public MergeTwoValues()

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this filter

Returns:

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

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

setInputFormat

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

Sets the format of the input instances.

Overrides:

setInputFormat in class Filter

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

input

public boolean input(Instance instance)

Input an instance for filtering. The instance is processed and made available for output immediately.

Overrides:

input in class Filter

Parameters:

instance - the input instance

Returns:

true if the filtered instance may now be collected with output().

Throws:

java.lang.IllegalStateException - if no input format has been set.

listOptions

public java.util.Enumeration listOptions()

Returns an enumeration describing the available options.

Specified by:

listOptions in interface OptionHandler

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:

 -C <col>
  Sets the attribute index (default last).

 -F <value index>
  Sets the first value's index (default first).

 -S <value index>
  Sets the second value's index (default last).

Specified by:

setOptions in interface OptionHandler

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

Returns:

an array of strings suitable for passing to setOptions

attributeIndexTipText

public java.lang.String attributeIndexTipText()

Returns:

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

getAttributeIndex

public java.lang.String getAttributeIndex()

Get the index of the attribute used.

Returns:

the index of the attribute

setAttributeIndex

public void setAttributeIndex(java.lang.String attIndex)

Sets index of the attribute used.

Parameters:

attIndex - the index of the attribute

firstValueIndexTipText

public java.lang.String firstValueIndexTipText()

Returns:

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

getFirstValueIndex

public java.lang.String getFirstValueIndex()

Get the index of the first value used.

Returns:

the index of the first value

setFirstValueIndex

public void setFirstValueIndex(java.lang.String firstIndex)

Sets index of the first value used.

Parameters:

firstIndex - the index of the first value

secondValueIndexTipText

public java.lang.String secondValueIndexTipText()

Returns:

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

getSecondValueIndex

public java.lang.String getSecondValueIndex()

Get the index of the second value used.

Returns:

the index of the second value

setSecondValueIndex

public void setSecondValueIndex(java.lang.String secondIndex)

Sets index of the second value used.

Parameters:

secondIndex - the index of the second value

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[] argv)

Main method for testing this class.

Parameters:

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