/*******************************************************************************
* Copyright (c) 2010 Haifeng Li
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package smile.mds;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
import smile.math.Math;
/**
*
* @author Haifeng Li
*/
public class MDSTest {
double[][] eurodist = {
{0, 3313, 2963, 3175, 3339, 2762, 3276, 2610, 4485, 2977, 3030, 4532, 2753, 3949, 2865, 2282, 2179, 3000, 817, 3927, 1991},
{3313, 0, 1318, 1326, 1294, 1498, 2218, 803, 1172, 2018, 1490, 1305, 645, 636, 521, 1014, 1365, 1033, 1460, 2868, 1802},
{2963, 1318, 0, 204, 583, 206, 966, 677, 2256, 597, 172, 2084, 690, 1558, 1011, 925, 747, 285, 1511, 1616, 1175},
{3175, 1326, 204, 0, 460, 409, 1136, 747, 2224, 714, 330, 2052, 739, 1550, 1059, 1077, 977, 280, 1662, 1786, 1381},
{3339, 1294, 583, 460, 0, 785, 1545, 853, 2047, 1115, 731, 1827, 789, 1347, 1101, 1209, 1160, 340, 1794, 2196, 1588},
{2762, 1498, 206, 409, 785, 0, 760, 1662, 2436, 460, 269, 2290, 714, 1764, 1035, 911, 583, 465, 1497, 1403, 937},
{3276, 2218, 966, 1136, 1545, 760, 0, 1418, 3196, 460, 269, 2971, 1458, 2498, 1778, 1537, 1104, 1176, 2050, 650, 1455},
{2610, 803, 677, 747, 853, 1662, 1418, 0, 1975, 1118, 895, 1936, 158, 1439, 425, 328, 591, 513, 995, 2068, 1019},
{4485, 1172, 2256, 2224, 2047, 2436, 3196, 1975, 0, 2897, 2428, 676, 1817, 698, 1693, 2185, 2565, 1971, 2631, 3886, 2974},
{2977, 2018, 597, 714, 1115, 460, 460, 1118, 2897, 0, 550, 2671, 1159, 2198, 1479, 1238, 805, 877, 1751, 949, 1155},
{3030, 1490, 172, 330, 731, 269, 269, 895, 2428, 550, 0, 2280, 863, 1730, 1183, 1098, 851, 457, 1683, 1500, 1205},
{4532, 1305, 2084, 2052, 1827, 2290, 2971, 1936, 676, 2671, 2280, 0, 1178, 668, 1762, 2250, 2507, 1799, 2700, 3231, 2937},
{2753, 645, 690, 739, 789, 714, 1458, 158, 1817, 1159, 863, 1178, 0, 1281, 320, 328, 724, 471, 1048, 2108, 1157},
{3949, 636, 1558, 1550, 1347, 1764, 2498, 1439, 698, 2198, 1730, 668, 1281, 0, 1157, 1724, 2010, 1273, 2097, 3188, 2409},
{2865, 521, 1011, 1059, 1101, 1035, 1778, 425, 1693, 1479, 1183, 1762, 320, 1157, 0, 618, 1109, 792, 1011, 2428, 1363},
{2282, 1014, 925, 1077, 1209, 911, 1537, 328, 2185, 1238, 1098, 2250, 328, 1724, 618, 0, 331, 856, 586, 2187, 898},
{2179, 1365, 747, 977, 1160, 583, 1104, 591, 2565, 805, 851, 2507, 724, 2010, 1109, 331, 0, 821, 946, 1754, 428},
{3000, 1033, 285, 280, 340, 465, 1176, 513, 1971, 877, 457, 1799, 471, 1273, 792, 856, 821, 0, 1476, 1827, 1249},
{817, 1460, 1511, 1662, 1794, 1497, 2050, 995, 2631, 1751, 1683, 2700, 1048, 2097, 1011, 586, 946, 1476, 0, 2707, 1209},
{3927, 2868, 1616, 1786, 2196, 1403, 650, 2068, 3886, 949, 1500, 3231, 2108, 3188, 2428, 2187, 1754, 1827, 2707, 0, 2105},
{1991, 1802, 1175, 1381, 1588, 937, 1455, 1019, 2974, 1155, 1205, 2937, 1157, 2409, 1363, 898, 428, 1249, 1209, 2105, 0}
};
public MDSTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
}
@AfterClass
public static void tearDownClass() throws Exception {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
/**
* Test of learn method, of class MDS.
*/
@Test
public void testLearn_doubleArrArr() {
System.out.println("learn");
double[] eigs = {19538377.0895, 11856555.3340};
double[][] points = {
{ 2290.274680, 1798.80293},
{ -825.382790, 546.81148},
{ 59.183341, -367.08135},
{ -82.845973, -429.91466},
{ -352.499435, -290.90843},
{ 293.689633, -405.31194},
{ 681.931545, -1108.64478},
{ -9.423364, 240.40600},
{-2048.449113, 642.45854},
{ 561.108970, -773.36929},
{ 164.921799, -549.36704},
{-1935.040811, 49.12514},
{ -226.423236, 187.08779},
{-1423.353697, 305.87513},
{ -299.498710, 388.80726},
{ 260.878046, 416.67381},
{ 587.675679, 81.18224},
{ -156.836257, -211.13911},
{ 709.413282, 1109.36665},
{ 839.445911, -1836.79055},
{ 911.230500, 205.93020}
};
MDS mds = new MDS(eurodist);
for (int i = 0; i < eigs.length; i++) {
System.out.print(eigs[i] + " ");
}
System.out.println("==============");
for (int i = 0; i < mds.getEigenValues().length; i++) {
System.out.print(mds.getEigenValues()[i] + " ");
}
System.out.println();
assertTrue(Math.equals(eigs, mds.getEigenValues(), 1E-4));
double[][] coords = mds.getCoordinates();
for (int i = 0; i < points.length; i++) {
for (int j = 0; j < points[0].length; j++) {
assertEquals(Math.abs(points[i][j]), Math.abs(coords[i][j]), 1E-2);
}
}
}
/**
* Test of learn method, of class MDS.
*/
@Test
public void testLearn_doubleArrArr_double() {
System.out.println("learn");
double[] eigs = {42274973.8, 31666186.4};
double[][] points = {
{ 2716.561820, 3549.216493},
{-1453.753109, 455.895291},
{ 217.426476, -1073.442137},
{ 1.682974, -1135.742982},
{ -461.875781, -871.913389},
{ 594.256798, -1029.818247},
{ 1271.216005, -1622.039302},
{ -88.721376, 4.068005},
{-3059.180990, 836.535103},
{ 1056.316198, -1350.037932},
{ 445.663432, -1304.392098},
{-2866.160085, 211.043554},
{ -436.147722, -140.147837},
{-2300.753691, 234.863677},
{ -586.877042, 217.428075},
{ 336.906562, 350.948939},
{ 928.407679, -112.132182},
{ -193.653844, -847.157498},
{ 908.682100, 1742.395923},
{ 1499.140467, -1897.522865},
{ 1319.918808, 295.010834}
};
MDS mds = new MDS(eurodist, 2, true);
assertTrue(Math.equals(eigs, mds.getEigenValues(), 1E-1));
double[][] coords = mds.getCoordinates();
for (int i = 0; i < points.length; i++) {
for (int j = 0; j < points[0].length; j++) {
assertEquals(Math.abs(points[i][j]), Math.abs(coords[i][j]), 1E-2);
}
}
}
}
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