Constructor Detail

• AttributeSelection

  public AttributeSelection()

  Constructor

Method Detail

• 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

• listOptions

  public java.util.Enumeration listOptions()

  Returns an enumeration describing the available options.

  Specified by:

  listOptions in interface OptionHandler

  Returns:

  an enumeration of all the available options.

• setOptions

  public void setOptions​(java.lang.String[] options)
                  throws java.lang.Exception

  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)

  Specified by:

  setOptions in interface OptionHandler

  Parameters:

  options - the list of options as an array of strings

  Throws:

  java.lang.Exception - if an option is not supported

• getOptions

  public java.lang.String[] getOptions()

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

  Specified by:

  getOptions in interface OptionHandler

  Returns:

  an array of strings suitable for passing to setOptions()

• evaluatorTipText

  public java.lang.String evaluatorTipText()

  Returns the tip text for this property

  Returns:

  tip text for this property suitable for displaying in the explorer/experimenter gui

• setEvaluator

  public void setEvaluator​(ASEvaluation evaluator)

  set attribute/subset evaluator

  Parameters:

  evaluator - the evaluator to use

• searchTipText

  public java.lang.String searchTipText()

  Returns the tip text for this property

  Returns:

  tip text for this property suitable for displaying in the explorer/experimenter gui

• setSearch

  public void setSearch​(ASSearch search)

  Set search class

  Parameters:

  search - the search class to use

• getEvaluator

  public ASEvaluation getEvaluator()

  Get the name of the attribute/subset evaluator

  Returns:

  the name of the attribute/subset evaluator as a string

• getSearch

  public ASSearch getSearch()

  Get the name of the search method

  Returns:

  the name of the search method as a string

• getCapabilities

  public Capabilities getCapabilities()

  Returns the Capabilities of this filter.

  Specified by:

  getCapabilities in interface CapabilitiesHandler

  Overrides:

  getCapabilities in class Filter

  Returns:

  the capabilities of this object

  See Also:

  Capabilities

• input

  public boolean input​(Instance instance)
                throws java.lang.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.

  Overrides:

  input in class Filter

  Parameters:

  instance - the input instance

  Returns:

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

  Throws:

  java.lang.IllegalStateException - if no input format has been defined.

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

• batchFinished

  public boolean batchFinished()
                        throws java.lang.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.

  Overrides:

  batchFinished in class Filter

  Returns:

  true if there are instances pending output.

  Throws:

  java.lang.IllegalStateException - if no input structure has been defined.

  java.lang.Exception - if there is a problem during the attribute selection.

• getRevision

  public java.lang.String getRevision()

  Returns the revision string.

  Specified by:

  getRevision in interface RevisionHandler

  Overrides:

  getRevision in class Filter

  Returns:

  the revision

• 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