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HoldOutSubsetEvaluator.java
Package: Weka-3-2.rar [view]
Upload User: rhdiban
Upload Date: 2013-08-09
Package Size: 15085k
Code Size: 2k
Category:
Windows Develop
Development Platform:
Java
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /*
- * HoldOutSubsetEvaluator.java
- * Copyright (C) 2000 Mark Hall
- *
- */
- package weka.attributeSelection;
- import java.io.*;
- import java.util.*;
- import weka.core.*;
- /**
- * Abstract attribute subset evaluator capable of evaluating subsets with
- * respect to a data set that is distinct from that used to initialize/
- * train the subset evaluator.
- *
- * @author Mark Hall (mhall@cs.waikato.ac.nz)
- * @version $Revision: 1.3 $
- */
- public abstract class HoldOutSubsetEvaluator extends SubsetEvaluator {
- /**
- * Evaluates a subset of attributes with respect to a set of instances.
- * @param subset a bitset representing the attribute subset to be
- * evaluated
- * @param holdOut a set of instances (possibly seperate and distinct
- * from those use to build/train the evaluator) with which to
- * evaluate the merit of the subset
- * @return the "merit" of the subset on the holdOut data
- * @exception Exception if the subset cannot be evaluated
- */
- public abstract double evaluateSubset(BitSet subset, Instances holdOut)
- throws Exception;
- /**
- * Evaluates a subset of attributes with respect to a single instance.
- * @param subset a bitset representing the attribute subset to be
- * evaluated
- * @param holdOut a single instance (possibly not one of those used to
- * build/train the evaluator) with which to evaluate the merit of the subset
- * @param retrain true if the classifier should be retrained with respect
- * to the new subset before testing on the holdOut instance.
- * @return the "merit" of the subset on the holdOut instance
- * @exception Exception if the subset cannot be evaluated
- */
- public abstract double evaluateSubset(BitSet subset,
- Instance holdOut,
- boolean retrain)
- throws Exception;
- }