examplevisualizer.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.gui;

import edu.udo.cs.yale.ObjectVisualizer;
import edu.udo.cs.yale.example.YaleIdMapping;
import edu.udo.cs.yale.example.Example;
import edu.udo.cs.yale.example.Attribute;

import javax.swing.*;
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import java.awt.event.*;

/** A visualizer which shows the attribute values of an example.
 * 
 *  @version $Id: ExampleVisualizer.java,v 2.3 2004/08/27 11:57:33 ingomierswa Exp $
 */
public class ExampleVisualizer implements ObjectVisualizer {

    private JDialog dialog;

    public void init() {}

    public void startVisualization(String objId) {
	dialog = new JDialog(YaleGUI.getMainFrame(), "Example: " + objId, false);
	dialog.getContentPane().setLayout(new BorderLayout());
	Example example = YaleIdMapping.getDefaultMapping().getExampleFromId(objId);
	
	String exampleText = "Regular attributes:<br><table>";
	for (int i = 0; i < example.getNumberOfAttributes(); i++) {
	    Attribute attribute = example.getAttribute(i);
	    exampleText += "<tr><td>"+attribute.getName()+": </td><td>"+example.getValue(attribute)+"</td></tr>";
	}
	exampleText += "</table><br><br>";
	exampleText += "Special attributes:<br><table>";
	if (example.getLabelAttribute() != null)
	    exampleText += "<tr><td>Label: </td><td>"+example.getLabel()+"</td></tr>";
	if (example.getPredictedLabelAttribute() != null)
	    exampleText += "<tr><td>Prediction: </td><td>"+example.getPredictedLabel()+"</td></tr>";
	exampleText += "</table>";
	JPanel textPanel = SwingTools.createTextPanel("Example: " + objId, exampleText);
	JScrollPane scrollPane = new JScrollPane(textPanel);
	dialog.getContentPane().add(scrollPane, BorderLayout.CENTER);

	JPanel buttons = new JPanel(new FlowLayout());
	JButton okButton = new JButton("Ok");
	okButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    dialog.dispose();
		}
	    });
	buttons.add(okButton);
	dialog.getContentPane().add(buttons, BorderLayout.SOUTH);
	dialog.pack();
	dialog.setLocationRelativeTo(YaleGUI.getMainFrame());
	dialog.show();
    }

    public void stopVisualization(String objId) {
	dialog.dispose();
    }

    public String getTitle(String objId) {
	return objId;
    }

    public boolean isCapableToVisualize(String id) {
	return YaleIdMapping.getDefaultMapping().getExampleFromId(id) != null;
    }
}