datarowtest.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.test;

import edu.udo.cs.yale.test.TestCase;
import edu.udo.cs.yale.example.*;

/** Tests creation and parsing of sparse and dense data rows, including
 *  missing values.
 *
 *  @version $Id: DataRowTest.java,v 1.5 2004/08/27 11:57:32 ingomierswa Exp $ */
public class DataRowTest extends TestCase {

    private Attribute[] attributes;
    private double[] expected;

    public void setUp() throws Exception {
	super.setUp();
	attributes = ExampleTestTools.createFourAttributes();
	expected   = new double[] { Attribute.FIRST_CLASS_INDEX+1, 
				    Double.NaN, 
				    5.0,
				    2.3 };
    }

    public void tearDown() throws Exception {
	attributes = null;
	expected = null;
	super.tearDown();
    }

    private void assertDataRow(String message, DataRow dataRow, double[] expected) {
	for (int i = 0; i < expected.length; i++) {
	    assertEqualsNaN(message + " " + attributes[i].getName(),
			    expected[i],
			    dataRow.get(attributes[i]));
	}
    }

    private void objectTest(String message, DataRowFactory factory) {
	DataRow dataRow = 
	    factory.create(new Object[] { "cat", null, new Integer(5), new Double(2.3) },
			   attributes);
	assertDataRow(message + " object", dataRow, expected);
    }

    private void stringTest(String message, DataRowFactory factory) {
	DataRow dataRow = 
	    factory.create(new String[] { "cat", "?", "5", "2.3" },
			   attributes);
	assertDataRow(message + " string", dataRow, expected);
    }

    public void testDoubleArrayStrings() {
	objectTest("double_array", new DataRowFactory(DataRowFactory.TYPE_DOUBLE_ARRAY));
    }

    public void testDoubleArrayObjects() {
	stringTest("double_array", new DataRowFactory(DataRowFactory.TYPE_DOUBLE_ARRAY));
    }

    public void testSparseMapStrings() {
	stringTest("sparse_map", new DataRowFactory(DataRowFactory.TYPE_SPARSE_MAP));
    }

    public void testSparseMapObjects() {
	objectTest("sparse_map", new DataRowFactory(DataRowFactory.TYPE_SPARSE_MAP));
    }


}