/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.math.stat.descriptive;
import org.apache.commons.math.stat.descriptive.moment.FourthMoment;
import org.apache.commons.math.stat.descriptive.moment.Kurtosis;
import org.apache.commons.math.stat.descriptive.moment.Mean;
import org.apache.commons.math.stat.descriptive.moment.Skewness;
import org.apache.commons.math.stat.descriptive.moment.Variance;
import junit.framework.TestCase;
/**
* @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $
*/
public class InteractionTest extends TestCase {
protected double mean = 12.40454545454550;
protected double var = 10.00235930735930;
protected double skew = 1.437423729196190;
protected double kurt = 2.377191264804700;
protected double tolerance = 10E-12;
protected double[] testArray =
{
12.5,
12,
11.8,
14.2,
14.9,
14.5,
21,
8.2,
10.3,
11.3,
14.1,
9.9,
12.2,
12,
12.1,
11,
19.8,
11,
10,
8.8,
9,
12.3 };
public InteractionTest(String name) {
super(name);
}
public void testInteraction() {
FourthMoment m4 = new FourthMoment();
Mean m = new Mean(m4);
Variance v = new Variance(m4);
Skewness s= new Skewness(m4);
Kurtosis k = new Kurtosis(m4);
for (int i = 0; i < testArray.length; i++){
m4.increment(testArray[i]);
}
assertEquals(mean,m.getResult(),tolerance);
assertEquals(var,v.getResult(),tolerance);
assertEquals(skew ,s.getResult(),tolerance);
assertEquals(kurt,k.getResult(),tolerance);
}
}