Package weka.attributeSelection

Class ASSearch

java.lang.Object
weka.attributeSelection.ASSearch
All Implemented Interfaces:
Serializable, OptionHandler, RevisionHandler
Direct Known Subclasses:
BestFirst, GreedyStepwise, Ranker
public abstract class ASSearch extends Object implements Serializable, RevisionHandler, OptionHandler
Abstract attribute selection search class.
Version:
$Revision: 15519 $
Author:
Mark Hall (mhall@cs.waikato.ac.nz)
See Also:

  • Constructor Details

    • ASSearch

      public ASSearch()

  • Method Details

    • listOptions

      public Enumeration<Option> 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(String[] options) throws Exception
      Parses a given list of options.

      Specified by:
      setOptions in interface OptionHandler
      Parameters:
      options - the list of options as an array of strings
      Throws:
      Exception - if an option is not supported

    • getOptions

      public String[] getOptions()
      Gets the current settings of the search.
      Specified by:
      getOptions in interface OptionHandler
      Returns:
      an array of strings suitable for passing to setOptions

    • getRevision

      public String getRevision()
      Returns the revision string.
      Specified by:
      getRevision in interface RevisionHandler
      Returns:
      the revision

    • search

      public abstract int[] search(ASEvaluation ASEvaluator, Instances data) throws Exception
      Searches the attribute subset/ranking space.
      Parameters:
      ASEvaluator - the attribute evaluator to guide the search
      data - the training instances.
      Returns:
      an array (not necessarily ordered) of selected attribute indexes
      Throws:
      Exception - if the search can't be completed

    • forName

      public static ASSearch forName(String searchName, String[] options) throws Exception
      Creates a new instance of a search class given it's class name and (optional) arguments to pass to it's setOptions method. If the search method implements OptionHandler and the options parameter is non-null, the search method will have it's options set.
      Parameters:
      searchName - the fully qualified class name of the search class
      options - an array of options suitable for passing to setOptions. May be null.
      Returns:
      the newly created search object, ready for use.
      Throws:
      Exception - if the search class name is invalid, or the options supplied are not acceptable to the search class.

    • makeCopies

      public static ASSearch[] makeCopies(ASSearch model, int num) throws Exception
      Creates copies of the current search scheme. Note that this method now uses Serialization to perform a deep copy, so the search object must be fully Serializable. Any currently built model will now be copied as well.
      Parameters:
      model - an example search scheme to copy
      num - the number of search scheme copies to create.
      Returns:
      an array of search schemes.
      Throws:
      Exception - if an error occurs