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Java example source code file (StatisticalReferenceDatasetFactory.java)
The StatisticalReferenceDatasetFactory.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.optimization.general; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import org.apache.commons.math3.analysis.differentiation.DerivativeStructure; /** * A factory to create instances of {@link StatisticalReferenceDataset} from * available resources. */ @Deprecated public class StatisticalReferenceDatasetFactory { private StatisticalReferenceDatasetFactory() { // Do nothing } /** * Creates a new buffered reader from the specified resource name. * * @param name the name of the resource * @return a buffered reader * @throws IOException if an I/O error occurred */ public static BufferedReader createBufferedReaderFromResource(final String name) throws IOException { final InputStream resourceAsStream; resourceAsStream = StatisticalReferenceDatasetFactory.class .getResourceAsStream(name); if (resourceAsStream == null) { throw new IOException("could not find resource " + name); } return new BufferedReader(new InputStreamReader(resourceAsStream)); } public static StatisticalReferenceDataset createKirby2() throws IOException { final BufferedReader in = createBufferedReaderFromResource("Kirby2.dat"); StatisticalReferenceDataset dataset = null; try { dataset = new StatisticalReferenceDataset(in) { @Override public DerivativeStructure getModelValue(final double x, final DerivativeStructure[] a) { final DerivativeStructure p = a[0].add(a[1].add(a[2].multiply(x)).multiply(x)); final DerivativeStructure q = a[3].add(a[4].multiply(x)).multiply(x).add(1.0); return p.divide(q); } }; } finally { in.close(); } return dataset; } public static StatisticalReferenceDataset createHahn1() throws IOException { final BufferedReader in = createBufferedReaderFromResource("Hahn1.dat"); StatisticalReferenceDataset dataset = null; try { dataset = new StatisticalReferenceDataset(in) { @Override public DerivativeStructure getModelValue(final double x, final DerivativeStructure[] a) { final DerivativeStructure p = a[0].add(a[1].add(a[2].add(a[3].multiply(x)).multiply(x)).multiply(x)); final DerivativeStructure q = a[4].add(a[5].add(a[6].multiply(x)).multiply(x)).multiply(x).add(1.0); return p.divide(q); } }; } finally { in.close(); } return dataset; } public static StatisticalReferenceDataset createMGH17() throws IOException { final BufferedReader in = createBufferedReaderFromResource("MGH17.dat"); StatisticalReferenceDataset dataset = null; try { dataset = new StatisticalReferenceDataset(in) { @Override public DerivativeStructure getModelValue(final double x, final DerivativeStructure[] a) { return a[0].add(a[1].multiply(a[3].multiply(-x).exp())).add(a[2].multiply(a[4].multiply(-x).exp())); } }; } finally { in.close(); } return dataset; } public static StatisticalReferenceDataset createLanczos1() throws IOException { final BufferedReader in = createBufferedReaderFromResource("Lanczos1.dat"); StatisticalReferenceDataset dataset = null; try { dataset = new StatisticalReferenceDataset(in) { @Override public DerivativeStructure getModelValue(final double x, final DerivativeStructure[] a) { return a[0].multiply(a[3].multiply(-x).exp()).add( a[1].multiply(a[4].multiply(-x).exp())).add( a[2].multiply(a[5].multiply(-x).exp())); } }; } finally { in.close(); } return dataset; } /** * Returns an array with all available reference datasets. * * @return the array of datasets * @throws IOException if an I/O error occurs */ public StatisticalReferenceDataset[] createAll() throws IOException { return new StatisticalReferenceDataset[] { createKirby2(), createMGH17() }; } } Other Java examples (source code examples)Here is a short list of links related to this Java StatisticalReferenceDatasetFactory.java source code file: |
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