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Class weka.filters.AttributeSelectionFilter

java.lang.Object
   |
   +----weka.filters.Filter
           |
           +----weka.filters.AttributeSelectionFilter

public class AttributeSelectionFilter

extends Filter

implements OptionHandler

Valid options are:

-S <"Name of search class [search options]">
Set search method for subset evaluators.
eg. -S "weka.attributeSelection.BestFirst -S 8"

-E <"Name of attribute/subset evaluation class [evaluator options]">
Set the attribute/subset evaluator.
eg. -E "weka.attributeSelection.CfsSubsetEval -L"

Version:

$Revision: 1.11 $

Author:

Mark Hall (mhall@cs.waikato.ac.nz)

AttributeSelectionFilter()

Constructor

batchFinished()

Signify that this batch of input to the filter is finished.

getEvaluator()

Get the name of the attribute/subset evaluator

getOptions()

Gets the current settings for the attribute selection (search, evaluator) etc.

getSearch()

Get the name of the search method

input(Instance)

Input an instance for filtering.

listOptions()

Returns an enumeration describing the available options

main(String[])

Main method for testing this class.

setEvaluator(ASEvaluation)

set a string holding the name of a attribute/subset evaluator

setOptions(String[])

Parses a given list of options.

setSearch(ASSearch)

Set as string holding the name of a search class

 public AttributeSelectionFilter()

Constructor

 public Enumeration listOptions()

Returns an enumeration describing the available options

Returns:

an enumeration of all the available options

 public void setOptions(String options[]) throws Exception

Parses a given list of options. Valid options are:

-S <"Name of search class [search options]">
Set search method for subset evaluators.
eg. -S "weka.attributeSelection.BestFirst -S 8"

-E <"Name of attribute/subset evaluation class [evaluator options]">
Set the attribute/subset evaluator.
eg. -E "weka.attributeSelection.CfsSubsetEval -L"

Parameters:

options - the list of options as an array of strings

Throws: Exception

if an option is not supported

 public String[] getOptions()

Gets the current settings for the attribute selection (search, evaluator) etc.

Returns:

an array of strings suitable for passing to setOptions()

 public void setEvaluator(ASEvaluation evaluator)

set a string holding the name of a attribute/subset evaluator

 public void setSearch(ASSearch search)

Set as string holding the name of a search class

 public ASEvaluation getEvaluator()

Get the name of the attribute/subset evaluator

Returns:

the name of the attribute/subset evaluator as a string

 public ASSearch getSearch()

Get the name of the search method

Returns:

the name of the search method as a string

 public boolean input(Instance instance) throws Exception

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.

Parameters:

instance - the input instance

Returns:

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

Throws: Exception

if the input instance was not of the correct format or if there was a problem with the filtering.

Overrides:

input in class Filter

 public boolean batchFinished() throws Exception

Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances.

Returns:

true if there are instances pending output

Throws: Exception

if no input structure has been defined

Overrides:

batchFinished in class Filter

 public static void main(String argv[])

Main method for testing this class.

Parameters:

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

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