1 /*
2  * This file is part of ELKI:
3  * Environment for Developing KDD-Applications Supported by Index-Structures
4  *
5  * Copyright (C) 2018
6  * ELKI Development Team
7  *
8  * This program is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU Affero General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU Affero General Public License for more details.
17  *
18  * You should have received a copy of the GNU Affero General Public License
19  * along with this program. If not, see <http://www.gnu.org/licenses/>.
20  */
21 package de.lmu.ifi.dbs.elki.math.statistics.distribution.estimator;
22 
23 import org.junit.Test;
24 
25 import de.lmu.ifi.dbs.elki.math.statistics.distribution.LaplaceDistribution;
26 import de.lmu.ifi.dbs.elki.utilities.datastructures.arraylike.DoubleArrayAdapter;
27 
28 /**
29  * Regression test the estimation for the Laplace MAD estimation.
30  *
31  * @author Erich Schubert
32  */
33 public class LaplaceMADEstimatorTest extends AbstractDistributionEstimatorTest {
34   @Test
testEstimator()35   public void testEstimator() {
36     final LaplaceMADEstimator est = instantiate(LaplaceMADEstimator.class, LaplaceDistribution.class);
37     load("lap.ascii.gz");
38     double[] data;
39     LaplaceDistribution dist;
40     data = this.data.get("random_1_3");
41     dist = est.estimate(data, DoubleArrayAdapter.STATIC);
42     assertStat("rate", dist.getRate(), 1, 0.046455781235775984);
43     assertStat("loc", dist.getLocation(), 3, -0.04027330298719978);
44     data = this.data.get("random_4_05");
45     dist = est.estimate(data, DoubleArrayAdapter.STATIC);
46     assertStat("rate", dist.getRate(), 4, 0.0021131826782738727);
47     assertStat("loc", dist.getLocation(), .5, -0.045715312384149276);
48   }
49 }
50