Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Function.java @ 3177:585c0b49e696

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Added inverses of the fitting functions. flys-artifacts/trunk@4792 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 26 Jun 2012 06:33:37 +0000
parents 4dda67a893da
children
rev   line source
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.flys.artifacts.math.fitting;
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2
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3 import org.apache.commons.math.FunctionEvaluationException;
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4
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5 import org.apache.commons.math.optimization.fitting.ParametricRealFunction;
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6
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7 import de.intevation.flys.utils.DoubleUtil;
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8
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9 public abstract class Function
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10 implements ParametricRealFunction
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11 {
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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12 protected String name;
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13 protected String description;
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14 protected String [] parameterNames;
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15 protected double [] initialGuess;
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16
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17 public static abstract class Derivative {
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18
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19 protected String description;
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20
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21 public Derivative() {
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22 }
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23
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24 public Derivative(String description) {
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25 this.description = description;
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26 }
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27
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28 public String getDescription() {
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29 return description;
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30 }
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31
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32 public abstract de.intevation.flys.artifacts.math.Function
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33 instantiate(double [] parameters);
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34
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35 } // interface Derivative
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36
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37 public Function() {
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38 }
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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parents:
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39
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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40 public Function(
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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parents:
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41 String name,
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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42 String description,
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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43 String [] parameterNames
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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44 ) {
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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45 this(name,
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46 description,
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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47 parameterNames,
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48 DoubleUtil.fill(parameterNames.length, 1d));
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49 }
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50
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51 public Function(
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52 String name,
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53 String description,
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
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54 String [] parameterNames,
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55 double [] initialGuess
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56 ) {
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57 this.name = name;
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58 this.description = description;
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59 this.parameterNames = parameterNames;
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60 this.initialGuess = initialGuess;
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61 }
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62
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63 public String getName() {
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64 return name;
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65 }
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66
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67 public String getDescription() {
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68 return description;
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69 }
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70
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71 public String [] getParameterNames() {
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72 return parameterNames;
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73 }
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74
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75 public double [] getInitialGuess() {
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76 return initialGuess;
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77 }
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78
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79 public de.intevation.flys.artifacts.math.Function instantiate(
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80 final double [] parameters
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81 ) {
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82 return new de.intevation.flys.artifacts.math.Function() {
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83
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84 @Override
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85 public double value(double x) {
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86 try {
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87 return Function.this.value(x, parameters);
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88 }
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89 catch (FunctionEvaluationException fee) {
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90 return Double.NaN;
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91 }
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92 }
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93 };
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94 }
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95
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96 public abstract Derivative getDerivative();
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97
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98 public abstract Function getInverse();
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99 }
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100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org