类 RemoveUseless
java.lang.Object
weka.filters.Filter
weka.filters.unsupervised.attribute.RemoveUseless
This filter removes attributes that do not vary at all or that vary too much. All constant attributes are deleted automatically, along with any that exceed the maximum percentage of variance parameter. The maximum variance test is only applied to nominal attributes.
Valid options are:
-M <max variance %> Maximum variance percentage allowed (default 99)
- 版本:
- $Revision: 7470 $
- 作者:
- Richard Kirkby (rkirkby@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 Capabilities of this filter.double
Gets the maximum variance attributes are allowed to have before they are deleted by the filter.String[]
Gets the current settings of the filter.Returns the revision string.Returns 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 propertyboolean
setInputFormat
(Instances instanceInfo) Sets the format of the input instances.void
setMaximumVariancePercentageAllowed
(double maxVariance) Sets the maximum variance attributes are allowed to have before they are deleted by the filter.void
setOptions
(String[] options) Parses a given list of options.从类继承的方法 weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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构造器详细资料
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RemoveUseless
public RemoveUseless()
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方法详细资料
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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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setInputFormat
Sets the format of the input instances.- 覆盖:
setInputFormat
在类中Filter
- 参数:
instanceInfo
- an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).- 返回:
- true if the outputFormat may be collected immediately
- 抛出:
Exception
- if the inputFormat can't be set successfully
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input
Input an instance for filtering. -
batchFinished
Signify that this batch of input to the filter is finished.- 覆盖:
batchFinished
在类中Filter
- 返回:
- true if there are instances pending output
- 抛出:
Exception
- if no input format defined
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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:-M <max variance %> Maximum variance percentage allowed (default 99)
- 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 of the filter.- 指定者:
getOptions
在接口中OptionHandler
- 返回:
- an array of strings suitable for passing to setOptions
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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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maximumVariancePercentageAllowedTipText
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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setMaximumVariancePercentageAllowed
public void setMaximumVariancePercentageAllowed(double maxVariance) Sets the maximum variance attributes are allowed to have before they are deleted by the filter.- 参数:
maxVariance
- the maximum variance allowed, specified as a percentage
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getMaximumVariancePercentageAllowed
public double getMaximumVariancePercentageAllowed()Gets the maximum variance attributes are allowed to have before they are deleted by the filter.- 返回:
- the maximum variance allowed, specified as a percentage
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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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