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Commons Math example source code file (HarmonicFunction.java)
The Commons Math HarmonicFunction.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.optimization.fitting; import org.apache.commons.math.analysis.DifferentiableUnivariateRealFunction; /** Harmonic function of the form <code>f (t) = a cos (? t + ?). * @version $Revision: 786479 $ $Date: 2009-06-19 08:36:16 -0400 (Fri, 19 Jun 2009) $ * @since 2.0 */ public class HarmonicFunction implements DifferentiableUnivariateRealFunction { /** Amplitude a. */ private final double a; /** Pulsation ?. */ private final double omega; /** Phase ?. */ private final double phi; /** Simple constructor. * @param a amplitude * @param omega pulsation * @param phi phase */ public HarmonicFunction(double a, double omega, double phi) { this.a = a; this.omega = omega; this.phi = phi; } /** {@inheritDoc} */ public double value(double x) { return a * Math.cos(omega * x + phi); } /** {@inheritDoc} */ public HarmonicFunction derivative() { return new HarmonicFunction(a * omega, omega, phi + Math.PI / 2); } /** Get the amplitude a. * @return amplitude a; */ public double getAmplitude() { return a; } /** Get the pulsation ?. * @return pulsation ? */ public double getPulsation() { return omega; } /** Get the phase ?. * @return phase ? */ public double getPhase() { return phi; } } Other Commons Math examples (source code examples)Here is a short list of links related to this Commons Math HarmonicFunction.java source code file: |
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