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## weka.attributeSelection
Class ASSearch

    java.lang.Object
      weka.attributeSelection.ASSearch

All Implemented Interfaces:
  java.io.Serializable, RevisionHandler

Direct Known Subclasses:
  BestFirst, ExhaustiveSearch, GeneticSearch, GreedyStepwise, LinearForwardSelection, RaceSearch, RandomSearch, Ranker, RankSearch, ScatterSearchV1, SubsetSizeForwardSelection

    public abstract class ASSearch

extends java.lang.Object
implements java.io.Serializable, RevisionHandler

Abstract attribute selection search class.

Version:
  $Revision: 1.12 $
Author:
  Mark Hall (mhall@cs.waikato.ac.nz)
See Also:
  Serialized Form

Constructor Summary
`ASSearch()`

Method Summary
`static ASSearch` | `forName(java.lang.String searchName, java.lang.String[] options)` Creates a new instance of a search class given it's class name and (optional) arguments to pass to it's setOptions method.
`java.lang.String` | `getRevision()` Returns the revision string.
`static ASSearch[]` | `makeCopies(ASSearch model, int num)` Creates copies of the current search scheme.
`abstract int[]` | `search(ASEvaluation ASEvaluator, Instances data)` Searches the attribute subset/ranking space.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ASSearch

    public ASSearch()

Method Detail

### getRevision

    public java.lang.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 java.lang.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:
    `java.lang.Exception` - if the search can't be completed

### forName

    public static ASSearch forName(java.lang.String searchName,
                                   java.lang.String[] options)
                            throws java.lang.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:
    `java.lang.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 java.lang.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:
    `java.lang.Exception` - if an error occurs

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