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: 15520 $
- Author:
- Mark Hall (mhall@cs.waikato.ac.nz)
- See Also:
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic ASSearchCreates a new instance of a search class given it's class name and (optional) arguments to pass to it's setOptions method.String[]Gets the current settings of the search.Returns the revision string.Returns an enumeration describing the available options.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.voidsetOptions(String[] options) Parses a given list of options.
-
Constructor Details
-
ASSearch
public ASSearch()
-
-
Method Details
-
listOptions
Returns an enumeration describing the available options.- Specified by:
listOptionsin interfaceOptionHandler- Returns:
- an enumeration of all the available options.
-
setOptions
Parses a given list of options.- Specified by:
setOptionsin interfaceOptionHandler- Parameters:
options- the list of options as an array of strings- Throws:
Exception- if an option is not supported
-
getOptions
Gets the current settings of the search.- Specified by:
getOptionsin interfaceOptionHandler- Returns:
- an array of strings suitable for passing to setOptions
-
getRevision
Returns the revision string.- Specified by:
getRevisionin interfaceRevisionHandler- Returns:
- the revision
-
search
Searches the attribute subset/ranking space.- Parameters:
ASEvaluator- the attribute evaluator to guide the searchdata- the training instances.- Returns:
- an array (not necessarily ordered) of selected attribute indexes
- Throws:
Exception- if the search can't be completed
-
forName
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 classoptions- 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
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 copynum- the number of search scheme copies to create.- Returns:
- an array of search schemes.
- Throws:
Exception- if an error occurs
-