类 AttributeSelection
java.lang.Object
weka.filters.Filter
weka.filters.supervised.attribute.AttributeSelection
A supervised attribute filter that can be used to select attributes. It is very flexible and allows various search and evaluation methods to be combined.
Valid options are:
-S <"Name of search class [search options]"> Sets search method for subset evaluators. eg. -S "weka.attributeSelection.BestFirst -S 8"
-E <"Name of attribute/subset evaluation class [evaluator options]"> Sets attribute/subset evaluator. eg. -E "weka.attributeSelection.CfsSubsetEval -L"
Options specific to evaluator weka.attributeSelection.CfsSubsetEval:
-M Treat missing values as a seperate value.
-L Don't include locally predictive attributes.
Options specific to search weka.attributeSelection.BestFirst:
-P <start set> Specify a starting set of attributes. Eg. 1,3,5-7.
-D <0 = backward | 1 = forward | 2 = bi-directional> Direction of search. (default = 1).
-N <num> Number of non-improving nodes to consider before terminating search.
-S <num> Size of lookup cache for evaluated subsets. Expressed as a multiple of the number of attributes in the data set. (default = 1)
- 版本:
- $Revision: 10868 $
- 作者:
- Mark Hall (mhall@cs.waikato.ac.nz)
- 另请参阅:
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构造器概要
构造器 -
方法概要
修饰符和类型方法说明boolean
Signify that this batch of input to the filter is finished.Returns the tip text for this propertyReturns the Capabilities of this filter.Get the name of the attribute/subset evaluatorString[]
Gets the current settings for the attribute selection (search, evaluator) etc.Returns the revision string.Get the name of the search methodReturns a string describing this filterboolean
Input an instance for filtering.Returns an enumeration describing the available options.static void
Main method for testing this class.Returns the tip text for this propertyvoid
setEvaluator
(ASEvaluation evaluator) set attribute/subset evaluatorvoid
setOptions
(String[] options) Parses a given list of options.void
Set search class从类继承的方法 weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, setInputFormat, toString, useFilter, wekaStaticWrapper
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构造器详细资料
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AttributeSelection
public AttributeSelection()Constructor
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方法详细资料
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globalInfo
Returns a string describing this filter- 返回:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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listOptions
Returns an enumeration describing the available options.- 指定者:
listOptions
在接口中OptionHandler
- 返回:
- an enumeration of all the available options.
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setOptions
Parses a given list of options. Valid options are:-S <"Name of search class [search options]"> Sets search method for subset evaluators. eg. -S "weka.attributeSelection.BestFirst -S 8"
-E <"Name of attribute/subset evaluation class [evaluator options]"> Sets attribute/subset evaluator. eg. -E "weka.attributeSelection.CfsSubsetEval -L"
Options specific to evaluator weka.attributeSelection.CfsSubsetEval:
-M Treat missing values as a seperate value.
-L Don't include locally predictive attributes.
Options specific to search weka.attributeSelection.BestFirst:
-P <start set> Specify a starting set of attributes. Eg. 1,3,5-7.
-D <0 = backward | 1 = forward | 2 = bi-directional> Direction of search. (default = 1).
-N <num> Number of non-improving nodes to consider before terminating search.
-S <num> Size of lookup cache for evaluated subsets. Expressed as a multiple of the number of attributes in the data set. (default = 1)
- 指定者:
setOptions
在接口中OptionHandler
- 参数:
options
- the list of options as an array of strings- 抛出:
Exception
- if an option is not supported
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getOptions
Gets the current settings for the attribute selection (search, evaluator) etc.- 指定者:
getOptions
在接口中OptionHandler
- 返回:
- an array of strings suitable for passing to setOptions()
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evaluatorTipText
Returns the tip text for this property- 返回:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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setEvaluator
set attribute/subset evaluator- 参数:
evaluator
- the evaluator to use
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searchTipText
Returns the tip text for this property- 返回:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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setSearch
Set search class- 参数:
search
- the search class to use
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getEvaluator
Get the name of the attribute/subset evaluator- 返回:
- the name of the attribute/subset evaluator as a string
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getSearch
Get the name of the search method- 返回:
- the name of the search method as a string
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getCapabilities
Returns the Capabilities of this filter.- 指定者:
getCapabilities
在接口中CapabilitiesHandler
- 覆盖:
getCapabilities
在类中Filter
- 返回:
- the capabilities of this object
- 另请参阅:
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input
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.- 覆盖:
input
在类中Filter
- 参数:
instance
- the input instance- 返回:
- true if the filtered instance may now be collected with output().
- 抛出:
IllegalStateException
- if no input format has been defined.Exception
- if the input instance was not of the correct format or if there was a problem with the filtering.
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batchFinished
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.- 覆盖:
batchFinished
在类中Filter
- 返回:
- true if there are instances pending output.
- 抛出:
IllegalStateException
- if no input structure has been defined.Exception
- if there is a problem during the attribute selection.
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getRevision
Returns the revision string.- 指定者:
getRevision
在接口中RevisionHandler
- 覆盖:
getRevision
在类中Filter
- 返回:
- the revision
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main
Main method for testing this class.- 参数:
argv
- should contain arguments to the filter: use -h for help
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