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Java > Open Source Codes > org > apache > commons > math > stat > descriptive > UnivariateStatisticAbstractTest


1 /*
2  * Copyright 2003-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.math.stat.descriptive;
17
18 import junit.framework.TestCase;
19
20 /**
21  * Test cases for the {@link UnivariateStatistic} class.
22  * @version $Revision$ $Date: 2005-02-26 05:11:52 -0800 (Sat, 26 Feb 2005) $
23  */
24 public abstract class UnivariateStatisticAbstractTest extends TestCase {
25
26     protected double mean = 12.404545454545455d;
27     protected double geoMean = 12.070589161633011d;
28
29     protected double var = 10.00235930735931d;
30     protected double std = Math.sqrt(var);
31     protected double skew = 1.437423729196190d;
32     protected double kurt = 2.377191264804700d;
33
34     protected double min = 8.2d;
35     protected double max = 21d;
36     protected double median = 12d;
37     protected double percentile5 = 8.29d;
38     protected double percentile95 = 20.82d;
39
40     protected double product = 628096400563833396009676.9200400128d;
41     protected double sumLog = 54.7969806116451507d;
42     protected double sumSq = 3595.250d;
43     protected double sum = 272.90d;
44     protected double secondMoment = 210.04954545454547d;
45     protected double thirdMoment = 868.0906859504136;
46     protected double fourthMoment = 9244.080993773481;
47
48     protected double tolerance = 10E-12;
49
50     protected double[] testArray =
51         {12.5, 12, 11.8, 14.2, 14.9, 14.5, 21, 8.2, 10.3, 11.3,
52           14.1, 9.9, 12.2, 12, 12.1, 11, 19.8, 11, 10, 8.8,
53            9, 12.3 };
54
55     public UnivariateStatisticAbstractTest(String JavaDoc name) {
56         super(name);
57     }
58
59     public abstract UnivariateStatistic getUnivariateStatistic();
60
61     public abstract double expectedValue();
62
63     public double getTolerance() {
64         return tolerance;
65     }
66
67     public void testEvaluation() throws Exception JavaDoc {
68         assertEquals(
69             expectedValue(),
70             getUnivariateStatistic().evaluate(testArray),
71             getTolerance());
72     }
73     
74 }
75
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