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Java example source code file (SparseRealVectorTest.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

abs, asin, cbrt, expm1, floor, openmaprealvector, override, realvector, realvectortestimpl, sinh, sqrt, tan, test, univariatefunction

The SparseRealVectorTest.java Java example 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.commons.math3.linear;

import org.apache.commons.math3.analysis.UnivariateFunction;
import org.apache.commons.math3.analysis.function.Abs;
import org.apache.commons.math3.analysis.function.Acos;
import org.apache.commons.math3.analysis.function.Asin;
import org.apache.commons.math3.analysis.function.Atan;
import org.apache.commons.math3.analysis.function.Cbrt;
import org.apache.commons.math3.analysis.function.Ceil;
import org.apache.commons.math3.analysis.function.Cos;
import org.apache.commons.math3.analysis.function.Cosh;
import org.apache.commons.math3.analysis.function.Exp;
import org.apache.commons.math3.analysis.function.Expm1;
import org.apache.commons.math3.analysis.function.Floor;
import org.apache.commons.math3.analysis.function.Log1p;
import org.apache.commons.math3.analysis.function.Power;
import org.apache.commons.math3.analysis.function.Rint;
import org.apache.commons.math3.analysis.function.Signum;
import org.apache.commons.math3.analysis.function.Sin;
import org.apache.commons.math3.analysis.function.Sinh;
import org.apache.commons.math3.analysis.function.Sqrt;
import org.apache.commons.math3.analysis.function.Tan;
import org.apache.commons.math3.analysis.function.Tanh;
import org.junit.Assert;
import org.junit.Test;

 * Test cases for the {@link OpenMapRealVector} class.
public class SparseRealVectorTest extends RealVectorAbstractTest {

    public RealVector create(double[] data) {
        return new OpenMapRealVector(data);

    public void testConstructors() {
        final double[] vec1 = {1d, 2d, 3d};
        final Double[] dvec1 = {1d, 2d, 3d, 4d, 5d, 6d, 7d, 8d, 9d};

        OpenMapRealVector v0 = new OpenMapRealVector();
        Assert.assertEquals("testData len", 0, v0.getDimension());

        OpenMapRealVector v1 = new OpenMapRealVector(7);
        Assert.assertEquals("testData len", 7, v1.getDimension());
        Assert.assertEquals("testData is 0.0 ", 0.0, v1.getEntry(6), 0);

        OpenMapRealVector v3 = new OpenMapRealVector(vec1);
        Assert.assertEquals("testData len", 3, v3.getDimension());
        Assert.assertEquals("testData is 2.0 ", 2.0, v3.getEntry(1), 0);

        //SparseRealVector v4 = new SparseRealVector(vec4, 3, 2);
        //Assert.assertEquals("testData len", 2, v4.getDimension());
        //Assert.assertEquals("testData is 4.0 ", 4.0, v4.getEntry(0));
        //try {
        //    new SparseRealVector(vec4, 8, 3);
        //    Assert.fail("MathIllegalArgumentException expected");
        //} catch (MathIllegalArgumentException ex) {
            // expected behavior

        RealVector v5_i = new OpenMapRealVector(dvec1);
        Assert.assertEquals("testData len", 9, v5_i.getDimension());
        Assert.assertEquals("testData is 9.0 ", 9.0, v5_i.getEntry(8), 0);

        OpenMapRealVector v5 = new OpenMapRealVector(dvec1);
        Assert.assertEquals("testData len", 9, v5.getDimension());
        Assert.assertEquals("testData is 9.0 ", 9.0, v5.getEntry(8), 0);

        OpenMapRealVector v7 = new OpenMapRealVector(v1);
        Assert.assertEquals("testData len", 7, v7.getDimension());
        Assert.assertEquals("testData is 0.0 ", 0.0, v7.getEntry(6), 0);

        RealVectorTestImpl v7_i = new RealVectorTestImpl(vec1);

        OpenMapRealVector v7_2 = new OpenMapRealVector(v7_i);
        Assert.assertEquals("testData len", 3, v7_2.getDimension());
        Assert.assertEquals("testData is 0.0 ", 2.0d, v7_2.getEntry(1), 0);

        OpenMapRealVector v8 = new OpenMapRealVector(v1);
        Assert.assertEquals("testData len", 7, v8.getDimension());
        Assert.assertEquals("testData is 0.0 ", 0.0, v8.getEntry(6), 0);


    /* Check that the operations do not throw an exception (cf. MATH-645). */
    public void testConcurrentModification() {
        final RealVector u = new OpenMapRealVector(3, 1e-6);
        u.setEntry(0, 1);
        u.setEntry(1, 0);
        u.setEntry(2, 2);

        final RealVector v1 = new OpenMapRealVector(3, 1e-6);
        v1.setEntry(0, 0);
        v1.setEntry(1, 3);
        v1.setEntry(2, 0);


    public void testEbeMultiplyMixedTypes() {
        doTestEbeBinaryOperation(BinaryOperation.MUL, true, true);

    public void testEbeMultiplySameType() {
        doTestEbeBinaryOperation(BinaryOperation.MUL, false, true);

    public void testEbeDivideSameType() {
        doTestEbeBinaryOperation(BinaryOperation.DIV, false, true);

    protected UnivariateFunction[] createFunctions() {
        return new UnivariateFunction[] {
            new Power(2.0), new Exp(), new Expm1(),
            new Log1p(), new Cosh(), new Sinh(), new Tanh(), new Cos(),
            new Sin(), new Tan(), new Acos(), new Asin(), new Atan(),
            new Abs(), new Sqrt(), new Cbrt(), new Ceil(),
            new Floor(), new Rint(), new Signum()


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