Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Function.java @ 4164:8d3e8cb54e4c
Add data for the gauge name to the GaugeDischargeCurveArtifact
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Wed, 17 Oct 2012 09:58:24 +0200 |
parents | 585c0b49e696 |
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rev | line source |
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2569
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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 |
2569
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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 { |
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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 } |
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39 |
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40 public Function( |
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41 String name, |
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42 String description, |
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43 String [] parameterNames |
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44 ) { |
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45 this(name, |
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46 description, |
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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, |
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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 : |