weka.filters.unsupervised.instance
Class RemoveWithValues

java.lang.Object
  |
  +--weka.filters.Filter
        |
        +--weka.filters.unsupervised.instance.RemoveWithValues

All Implemented Interfaces:

OptionHandler, java.io.Serializable, StreamableFilter, UnsupervisedFilter

public class RemoveWithValues

extends Filter

implements UnsupervisedFilter, StreamableFilter, OptionHandler

Filters instances according to the value of an attribute.

Valid filter-specific options are:

-C num
Choose attribute to be used for selection (default last).

-S num
Numeric value to be used for selection on numeric attribute. Instances with values smaller than given value will be selected. (default 0)

-L index1,index2-index4,...
Range of label indices to be used for selection on nominal attribute. First and last are valid indexes. (default all values)

-M
Missing values count as a match. This setting is independent of the -V option. (default missing values don't match)

-V
Invert matching sense.

-H
When selecting on nominal attributes, removes header references to excluded values.

Version:

$Revision: 1.5 $

Author:

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

See Also:

Serialized Form

Constructor Summary

RemoveWithValues()
Default constructor

Method Summary

java.lang.String	attributeIndexTipText() Returns the tip text for this property
java.lang.String	getAttributeIndex() Get the index of the attribute used.
boolean	getInvertSelection() Get whether the supplied columns are to be removed or kept
boolean	getMatchMissingValues() Gets whether missing values are counted as a match.
boolean	getModifyHeader() Gets whether the header will be modified when selecting on nominal attributes.
java.lang.String	getNominalIndices() Get the set of nominal value indices that will be used for selection
java.lang.String[]	getOptions() Gets the current settings of the filter.
double	getSplitPoint() Get the split point used for numeric selection
java.lang.String	globalInfo() Returns a string describing this classifier
boolean	input(Instance instance) Input an instance for filtering.
java.lang.String	invertSelectionTipText() Returns the tip text for this property
boolean	isNominal() Returns true if selection attribute is nominal.
boolean	isNumeric() Returns true if selection attribute is numeric.
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	matchMissingValuesTipText() Returns the tip text for this property
java.lang.String	modifyHeaderTipText() Returns the tip text for this property
java.lang.String	nominalIndicesTipText() Returns the tip text for this property
void	setAttributeIndex(java.lang.String attIndex) Sets index of the attribute used.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.
void	setInvertSelection(boolean invert) Set whether selected values should be removed or kept.
void	setMatchMissingValues(boolean newMatchMissingValues) Sets whether missing values are counted as a match.
void	setModifyHeader(boolean newModifyHeader) Sets whether the header will be modified when selecting on nominal attributes.
void	setNominalIndices(java.lang.String rangeList) Set which nominal labels are to be included in the selection.
void	setNominalIndicesArr(int[] values) Set which values of a nominal attribute are to be used for selection.
void	setOptions(java.lang.String[] options) Parses a given list of options.
void	setSplitPoint(double value) Split point to be used for selection on numeric attribute.
java.lang.String	splitPointTipText() Returns the tip text for this property

Methods inherited from class weka.filters.Filter

batchFilterFile, batchFinished, filterFile, getOutputFormat, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputPeek, useFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

RemoveWithValues

public RemoveWithValues()

Default constructor

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this classifier

Returns:

a description of the classifier 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

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 num
Choose attribute to be used for selection (default last).

-S num
Numeric value to be used for selection on numeric attribute. Instances with values smaller than given value will be selected. (default 0)

-L index1,index2-index4,...
Range of label indices to be used for selection on nominal attribute. First and last are valid indexes. (default all values)

-M
Missing values count as a match. This setting is independent of the -V option. (default missing values don't match)

-V
Invert matching sense.

-H
When selecting on nominal attributes, removes header references to excluded values.

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

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:

UnsupportedAttributeTypeException - if the specified attribute is neither numeric or nominal.

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

input

public boolean input(Instance instance)

Input an instance for filtering. Ordinarily the instance is processed and made available for output immediately. Some filters require all instances be read before producing output.

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.

isNominal

public boolean isNominal()

Returns true if selection attribute is nominal.

Returns:

true if selection attribute is nominal

isNumeric

public boolean isNumeric()

Returns true if selection attribute is numeric.

Returns:

true if selection attribute is numeric

modifyHeaderTipText

public java.lang.String modifyHeaderTipText()

Returns the tip text for this property

Returns:

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

getModifyHeader

public boolean getModifyHeader()

Gets whether the header will be modified when selecting on nominal attributes.

Returns:

true if so.

setModifyHeader

public void setModifyHeader(boolean newModifyHeader)

Sets whether the header will be modified when selecting on nominal attributes.

Parameters:

newModifyHeader - true if so.

attributeIndexTipText

public java.lang.String attributeIndexTipText()

Returns the tip text for this property

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.

splitPointTipText

public java.lang.String splitPointTipText()

Returns the tip text for this property

Returns:

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

getSplitPoint

public double getSplitPoint()

Get the split point used for numeric selection

Returns:

the numeric split point

setSplitPoint

public void setSplitPoint(double value)

Split point to be used for selection on numeric attribute.

Parameters:

value - the split point

matchMissingValuesTipText

public java.lang.String matchMissingValuesTipText()

Returns the tip text for this property

Returns:

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

getMatchMissingValues

public boolean getMatchMissingValues()

Gets whether missing values are counted as a match.

Returns:

true if missing values are counted as a match.

setMatchMissingValues

public void setMatchMissingValues(boolean newMatchMissingValues)

Sets whether missing values are counted as a match.

Parameters:

newMatchMissingValues - true if missing values are counted as a match.

invertSelectionTipText

public java.lang.String invertSelectionTipText()

Returns the tip text for this property

Returns:

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

getInvertSelection

public boolean getInvertSelection()

Get whether the supplied columns are to be removed or kept

Returns:

true if the supplied columns will be kept

setInvertSelection

public void setInvertSelection(boolean invert)

Set whether selected values should be removed or kept. If true the selected values are kept and unselected values are deleted.

Parameters:

invert - the new invert setting

nominalIndicesTipText

public java.lang.String nominalIndicesTipText()

Returns the tip text for this property

Returns:

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

getNominalIndices

public java.lang.String getNominalIndices()

Get the set of nominal value indices that will be used for selection

Returns:

rangeList a string representing the list of nominal indices.

setNominalIndices

public void setNominalIndices(java.lang.String rangeList)

Set which nominal labels are to be included in the selection.

Parameters:

rangeList - a string representing the list of nominal indices. eg: first-3,5,6-last

Throws:

InvalidArgumentException - if an invalid range list is supplied

setNominalIndicesArr

public void setNominalIndicesArr(int[] values)

Set which values of a nominal attribute are to be used for selection.

Parameters:

values - an array containing indexes of values to be used for selection

Throws:

InvalidArgumentException - if an invalid set of ranges is supplied

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