legalnumberexamplefilter.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.operator.preprocessing;

import edu.udo.cs.yale.example.Example;

/** THIS CLASS IS OBSOLETE<br>
 * This operator is a suboperator of <code>ExampleFilter</code> that only allows
 * examples that do not have a NaN-entry.
 *
 * @version $Id: LegalNumberExampleFilter.java,v 1.2 2004/08/27 11:57:44 ingomierswa Exp $
 */
public class LegalNumberExampleFilter extends ExampleFilter
{
    /**
     * The method to decide for each example whether to keep it or not.
     *
     * @param theExample The example to check.
     * @return TRUE if this example contains NaN-entries. FALSE otherwise.
     */
    public boolean deleteExample(Example theExample)
    {
	    for (int i = 0; i < theExample.getNumberOfAttributes(); i++)
	    {
	        if (Double.isNaN(theExample.getValue(i)))
		    {  return true;  }
	    }
	    return false;
    }
}