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Commons Math example source code file (GeometricMeanTest.java)
The Commons Math GeometricMeanTest.java source code/* * 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.moment; import org.apache.commons.math.stat.descriptive.StorelessUnivariateStatisticAbstractTest; import org.apache.commons.math.stat.descriptive.UnivariateStatistic; /** * Test cases for the {@link UnivariateStatistic} class. * @version $Revision: 902201 $ $Date: 2010-01-22 13:18:16 -0500 (Fri, 22 Jan 2010) $ */ public class GeometricMeanTest extends StorelessUnivariateStatisticAbstractTest{ protected GeometricMean stat; /** * @param name */ public GeometricMeanTest(String name) { super(name); } /** * {@inheritDoc} */ @Override public UnivariateStatistic getUnivariateStatistic() { return new GeometricMean(); } /** * {@inheritDoc} */ @Override public double expectedValue() { return this.geoMean; } public void testSpecialValues() { GeometricMean mean = new GeometricMean(); // empty assertTrue(Double.isNaN(mean.getResult())); // finite data mean.increment(1d); assertFalse(Double.isNaN(mean.getResult())); // add 0 -- makes log sum blow to minus infinity, should make 0 mean.increment(0d); assertEquals(0d, mean.getResult(), 0); // add positive infinity - note the minus infinity above mean.increment(Double.POSITIVE_INFINITY); assertTrue(Double.isNaN(mean.getResult())); // clear mean.clear(); assertTrue(Double.isNaN(mean.getResult())); // positive infinity by itself mean.increment(Double.POSITIVE_INFINITY); assertEquals(Double.POSITIVE_INFINITY, mean.getResult(), 0); // negative value -- should make NaN mean.increment(-2d); assertTrue(Double.isNaN(mean.getResult())); } } Other Commons Math examples (source code examples)Here is a short list of links related to this Commons Math GeometricMeanTest.java source code file: |
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