Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/artifacts/model/fixings/LogLinearFittingOperation.java @ 9646:0380717105ba
Implemented alternative fitting strategy for Log-Linear function.
| author | Gernot Belger <g.belger@bjoernsen.de> |
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| date | Mon, 02 Dec 2019 17:56:15 +0100 |
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| 9645:eb1a29fe823f | 9646:0380717105ba |
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| 1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde | |
| 2 * Software engineering by | |
| 3 * Björnsen Beratende Ingenieure GmbH | |
| 4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt | |
| 5 * | |
| 6 * This file is Free Software under the GNU AGPL (>=v3) | |
| 7 * and comes with ABSOLUTELY NO WARRANTY! Check out the | |
| 8 * documentation coming with Dive4Elements River for details. | |
| 9 */ | |
| 10 package org.dive4elements.river.artifacts.model.fixings; | |
| 11 | |
| 12 import java.util.List; | |
| 13 | |
| 14 import org.dive4elements.river.artifacts.math.fitting.LogLinearAlternative; | |
| 15 import org.dive4elements.river.artifacts.model.fixings.fitting.LinearLogLinearizedFitting; | |
| 16 import org.dive4elements.river.artifacts.model.fixings.fitting.LinearLogLinearizedFitting.Result; | |
| 17 | |
| 18 /** | |
| 19 * @author Gernot Belger | |
| 20 */ | |
| 21 final class LogLinearFittingOperation extends AbstractFittingOperation implements IFittingOperation { | |
| 22 | |
| 23 public LogLinearFittingOperation(final LogLinearAlternative function) { | |
| 24 super(function); | |
| 25 } | |
| 26 | |
| 27 @Override | |
| 28 public Fitting execute(final List<FittingData> data) { | |
| 29 | |
| 30 final double[] obsDischarges = new double[data.size()]; | |
| 31 final double[] obsWaterlevels = new double[data.size()]; | |
| 32 | |
| 33 for (int i = 0; i < data.size(); i++) { | |
| 34 final FittingData fittingData = data.get(i); | |
| 35 | |
| 36 obsDischarges[i] = fittingData.q; | |
| 37 obsWaterlevels[i] = fittingData.w; | |
| 38 } | |
| 39 | |
| 40 final LinearLogLinearizedFitting fitting = new LinearLogLinearizedFitting(obsDischarges, obsWaterlevels); | |
| 41 | |
| 42 final Result result = fitting.optimize(); | |
| 43 final double a = result.getA(); | |
| 44 final double b = result.getB(); | |
| 45 final double m = result.getM(); | |
| 46 final double chiSquare = result.getChiSquare(); | |
| 47 | |
| 48 final double[] parameters = new double[] { a, m, b }; | |
| 49 | |
| 50 return createFitting(parameters, chiSquare, data); | |
| 51 } | |
| 52 } |