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Commons Math example source code file (NewtonSolverTest.java)
The Commons Math NewtonSolverTest.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.analysis.solvers; import org.apache.commons.math.MathException; import org.apache.commons.math.analysis.DifferentiableUnivariateRealFunction; import org.apache.commons.math.analysis.QuinticFunction; import org.apache.commons.math.analysis.SinFunction; import junit.framework.TestCase; /** * @version $Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $ */ public final class NewtonSolverTest extends TestCase { @Deprecated public void testDeprecated() throws MathException { DifferentiableUnivariateRealFunction f = new SinFunction(); double result; UnivariateRealSolver solver = new NewtonSolver(f); result = solver.solve(3, 4); assertEquals(result, Math.PI, solver.getAbsoluteAccuracy()); result = solver.solve(1, 4); assertEquals(result, Math.PI, solver.getAbsoluteAccuracy()); assertEquals(result, solver.getResult(), 0); assertTrue(solver.getIterationCount() > 0); } /** * */ public void testSinZero() throws MathException { DifferentiableUnivariateRealFunction f = new SinFunction(); double result; UnivariateRealSolver solver = new NewtonSolver(); result = solver.solve(f, 3, 4); assertEquals(result, Math.PI, solver.getAbsoluteAccuracy()); result = solver.solve(f, 1, 4); assertEquals(result, Math.PI, solver.getAbsoluteAccuracy()); assertEquals(result, solver.getResult(), 0); assertTrue(solver.getIterationCount() > 0); } /** * */ public void testQuinticZero() throws MathException { DifferentiableUnivariateRealFunction f = new QuinticFunction(); double result; UnivariateRealSolver solver = new NewtonSolver(); result = solver.solve(f, -0.2, 0.2); assertEquals(result, 0, solver.getAbsoluteAccuracy()); result = solver.solve(f, -0.1, 0.3); assertEquals(result, 0, solver.getAbsoluteAccuracy()); result = solver.solve(f, -0.3, 0.45); assertEquals(result, 0, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.3, 0.7); assertEquals(result, 0.5, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.2, 0.6); assertEquals(result, 0.5, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.05, 0.95); assertEquals(result, 0.5, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.85, 1.25); assertEquals(result, 1.0, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.8, 1.2); assertEquals(result, 1.0, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.85, 1.75); assertEquals(result, 1.0, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.55, 1.45); assertEquals(result, 1.0, solver.getAbsoluteAccuracy()); result = solver.solve(f, 0.85, 5); assertEquals(result, 1.0, solver.getAbsoluteAccuracy()); } } Other Commons Math examples (source code examples)Here is a short list of links related to this Commons Math NewtonSolverTest.java source code file: |
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