alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Commons Math example source code file (SumTest.java)

This example Commons Math source code file (SumTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Math tags/keywords

override, override, storelessunivariatestatisticabstracttest, storelessunivariatestatisticabstracttest, sum, sum, sumtest, sumtest, univariatestatistic

The Commons Math SumTest.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.summary;

import org.apache.commons.math.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
import org.apache.commons.math.stat.descriptive.UnivariateStatistic;

/**
 * Test cases for the {@link Sum} class.
 * @version $Revision: 902201 $ $Date: 2010-01-22 13:18:16 -0500 (Fri, 22 Jan 2010) $
 */
public class SumTest extends StorelessUnivariateStatisticAbstractTest{

    protected Sum stat;

    /**
     * @param name
     */
    public SumTest(String name) {
        super(name);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public UnivariateStatistic getUnivariateStatistic() {
        return new Sum();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double expectedValue() {
        return this.sum;
    }

    /**Expected value for  the testArray defined in UnivariateStatisticAbstractTest */
    public double expectedWeightedValue() {
        return this.weightedSum;
    }

    public void testSpecialValues() {
        Sum sum = new Sum();
        assertTrue(Double.isNaN(sum.getResult()));
        sum.increment(1);
        assertEquals(1, sum.getResult(), 0);
        sum.increment(Double.POSITIVE_INFINITY);
        assertEquals(Double.POSITIVE_INFINITY, sum.getResult(), 0);
        sum.increment(Double.NEGATIVE_INFINITY);
        assertTrue(Double.isNaN(sum.getResult()));
        sum.increment(1);
        assertTrue(Double.isNaN(sum.getResult()));
    }

    public void testWeightedSum() {
        Sum sum = new Sum();
        assertEquals(expectedWeightedValue(), sum.evaluate(testArray, testWeightsArray, 0, testArray.length), getTolerance());
        assertEquals(expectedValue(), sum.evaluate(testArray, unitWeightsArray, 0, testArray.length), getTolerance());
    }

}

Other Commons Math examples (source code examples)

Here is a short list of links related to this Commons Math SumTest.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.