attributecounter.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 */
package edu.udo.cs.yale.example;

import java.util.Comparator;

/** Objects of this class count how often an attribute was used by a certain algorithm.
 *
 *  @author ingo
 *  @version $Id: AttributeCounter.java,v 2.3 2004/08/27 11:57:31 ingomierswa Exp $
 */
public class AttributeCounter implements Comparable {

    /** Counts, how often the attribute was used.
     */
    private int usecount;

    /** An attribute in the ExampleTable
     */
    private Attribute attribute;


    /** Constructs a new AttribtueCounter for teh given attribute.
     */
    public AttributeCounter(Attribute attribute) {
	this.attribute = attribute;
	this.usecount  = 1;
    }

    public Attribute getAttribute() {
	return attribute;
    }

    public int getUseCount() {
	return usecount;
    }

    public void incrementCounter() {
	usecount++;
    }

    public int compareTo(Object o) {
	return new Integer(((AttributeCounter)o).usecount).compareTo(new Integer(usecount));
    }

    public boolean equals(AttributeCounter ac) {
	return (this.attribute.getConstructionDescription().equals(ac.attribute.getConstructionDescription()));
    }
}