类 RemoveUseless

java.lang.Object
weka.filters.Filter
weka.filters.unsupervised.attribute.RemoveUseless
所有已实现的接口:
Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, UnsupervisedFilter

public class RemoveUseless extends Filter implements UnsupervisedFilter, OptionHandler
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:
  • 构造器详细资料

    • RemoveUseless

      public RemoveUseless()
  • 方法详细资料

    • getCapabilities

      public Capabilities 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:
    • setInputFormat

      public boolean setInputFormat(Instances instanceInfo) throws Exception
      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
    • input

      public boolean input(Instance instance)
      Input an instance for filtering.
      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().
    • batchFinished

      public boolean batchFinished() throws Exception
      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
    • listOptions

      public Enumeration 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.
    • setOptions

      public void setOptions(String[] options) throws Exception
      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
    • getOptions

      public String[] 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
    • globalInfo

      public String globalInfo()
      Returns a string describing this filter
      返回:
      a description of the filter suitable for displaying in the explorer/experimenter gui
    • maximumVariancePercentageAllowedTipText

      public String maximumVariancePercentageAllowedTipText()
      Returns the tip text for this property
      返回:
      tip text for this property suitable for displaying in the explorer/experimenter gui
    • 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
    • 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
    • getRevision

      public String 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
    • main

      public static void main(String[] argv)
      Main method for testing this class.
      参数:
      argv - should contain arguments to the filter: use -h for help