Class RemovePercentage
- java.lang.Object
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- weka.filters.Filter
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- weka.filters.unsupervised.instance.RemovePercentage
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- All Implemented Interfaces:
java.io.Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
,UnsupervisedFilter
public class RemovePercentage extends Filter implements UnsupervisedFilter, OptionHandler
A filter that removes a given percentage of a dataset. Valid options are:-P <percentage> Specifies percentage of instances to select. (default 50)
-V Specifies if inverse of selection is to be output.
- Version:
- $Revision: 5548 $
- Author:
- Richard Kirkby (eibe@cs.waikato.ac.nz), Eibe Frank (eibe@cs.waikato.ac.nz)
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description RemovePercentage()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
batchFinished()
Signify that this batch of input to the filter is finished.Capabilities
getCapabilities()
Returns the Capabilities of this filter.boolean
getInvertSelection()
Gets if selection is to be inverted.java.lang.String[]
getOptions()
Gets the current settings of the filter.double
getPercentage()
Gets the percentage of instances to select.java.lang.String
getRevision()
Returns the revision string.java.lang.String
globalInfo()
Returns a string describing this filterboolean
input(Instance instance)
Input an instance for filtering.java.lang.String
invertSelectionTipText()
Returns the tip text for this propertyjava.util.Enumeration
listOptions()
Gets an enumeration describing the available options..static void
main(java.lang.String[] argv)
Main method for testing this class.java.lang.String
percentageTipText()
Returns the tip text for this propertyboolean
setInputFormat(Instances instanceInfo)
Sets the format of the input instances.void
setInvertSelection(boolean inverse)
Sets if selection is to be inverted.void
setOptions(java.lang.String[] options)
Parses a given list of options.void
setPercentage(double percent)
Sets the percentage of intances to select.-
Methods inherited from class weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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Method Detail
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listOptions
public java.util.Enumeration listOptions()
Gets an enumeration describing the available options..- Specified by:
listOptions
in interfaceOptionHandler
- Returns:
- an enumeration of all the available options.
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setOptions
public void setOptions(java.lang.String[] options) throws java.lang.Exception
Parses a given list of options. Valid options are:-P <percentage> Specifies percentage of instances to select. (default 50)
-V Specifies if inverse of selection is to be output.
- Specified by:
setOptions
in interfaceOptionHandler
- Parameters:
options
- the list of options as an array of strings- Throws:
java.lang.Exception
- if an option is not supported
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getOptions
public java.lang.String[] getOptions()
Gets the current settings of the filter.- Specified by:
getOptions
in interfaceOptionHandler
- Returns:
- an array of strings suitable for passing to setOptions
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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
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percentageTipText
public java.lang.String percentageTipText()
Returns the tip text for this property- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getPercentage
public double getPercentage()
Gets the percentage of instances to select.- Returns:
- the percentage.
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setPercentage
public void setPercentage(double percent)
Sets the percentage of intances to select.- Parameters:
percent
- the percentage- Throws:
java.lang.IllegalArgumentException
- if percentage out of range
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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
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getInvertSelection
public boolean getInvertSelection()
Gets if selection is to be inverted.- Returns:
- true if the selection is to be inverted
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setInvertSelection
public void setInvertSelection(boolean inverse)
Sets if selection is to be inverted.- Parameters:
inverse
- true if inversion is to be performed
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getCapabilities
public Capabilities getCapabilities()
Returns the Capabilities of this filter.- Specified by:
getCapabilities
in interfaceCapabilitiesHandler
- Overrides:
getCapabilities
in classFilter
- Returns:
- the capabilities of this object
- See Also:
Capabilities
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setInputFormat
public boolean setInputFormat(Instances instanceInfo) throws java.lang.Exception
Sets the format of the input instances.- Overrides:
setInputFormat
in classFilter
- 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 because outputFormat can be collected immediately
- Throws:
java.lang.Exception
- if the input format can't be set successfully
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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.
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batchFinished
public boolean batchFinished()
Signify that this batch of input to the filter is finished. Output() may now be called to retrieve the filtered instances.- Overrides:
batchFinished
in classFilter
- Returns:
- true if there are instances pending output
- Throws:
java.lang.IllegalStateException
- if no input structure has been defined
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Overrides:
getRevision
in classFilter
- Returns:
- the revision
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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
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