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Java example source code file (IllinoisSolver.java)
The IllinoisSolver.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, * 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.math3.analysis.solvers; /** * Implements the <em>Illinois method for root-finding (approximating * a zero of a univariate real function). It is a modified * {@link RegulaFalsiSolver <em>Regula Falsi} method. * * <p>Like the Regula Falsi method, convergence is guaranteed by * maintaining a bracketed solution. The <em>Illinois method however, * should converge much faster than the original <em>Regula Falsi * method. Furthermore, this implementation of the <em>Illinois method * should not suffer from the same implementation issues as the <em>Regula * Falsi</em> method, which may fail to convergence in certain cases. * * <p>The Illinois method assumes that the function is continuous, * but not necessarily smooth.</p> * * <p>Implementation based on the following article: M. Dowell and P. Jarratt, * <em>A modified regula falsi method for computing the root of an * equation</em>, BIT Numerical Mathematics, volume 11, number 2, * pages 168-174, Springer, 1971.</p> * * @since 3.0 */ public class IllinoisSolver extends BaseSecantSolver { /** Construct a solver with default accuracy (1e-6). */ public IllinoisSolver() { super(DEFAULT_ABSOLUTE_ACCURACY, Method.ILLINOIS); } /** * Construct a solver. * * @param absoluteAccuracy Absolute accuracy. */ public IllinoisSolver(final double absoluteAccuracy) { super(absoluteAccuracy, Method.ILLINOIS); } /** * Construct a solver. * * @param relativeAccuracy Relative accuracy. * @param absoluteAccuracy Absolute accuracy. */ public IllinoisSolver(final double relativeAccuracy, final double absoluteAccuracy) { super(relativeAccuracy, absoluteAccuracy, Method.ILLINOIS); } /** * Construct a solver. * * @param relativeAccuracy Relative accuracy. * @param absoluteAccuracy Absolute accuracy. * @param functionValueAccuracy Maximum function value error. */ public IllinoisSolver(final double relativeAccuracy, final double absoluteAccuracy, final double functionValueAccuracy) { super(relativeAccuracy, absoluteAccuracy, functionValueAccuracy, Method.PEGASUS); } } Other Java examples (source code examples)Here is a short list of links related to this Java IllinoisSolver.java source code file: |
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