Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/Function.java @ 5831:bd047b71ab37
Repaired internal references
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 12:06:39 +0200 |
| parents | flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Function.java@585c0b49e696 |
| children |
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| 5830:160f53ee0870 | 5831:bd047b71ab37 |
|---|---|
| 1 package org.dive4elements.river.artifacts.math.fitting; | |
| 2 | |
| 3 import org.apache.commons.math.FunctionEvaluationException; | |
| 4 | |
| 5 import org.apache.commons.math.optimization.fitting.ParametricRealFunction; | |
| 6 | |
| 7 import org.dive4elements.river.utils.DoubleUtil; | |
| 8 | |
| 9 public abstract class Function | |
| 10 implements ParametricRealFunction | |
| 11 { | |
| 12 protected String name; | |
| 13 protected String description; | |
| 14 protected String [] parameterNames; | |
| 15 protected double [] initialGuess; | |
| 16 | |
| 17 public static abstract class Derivative { | |
| 18 | |
| 19 protected String description; | |
| 20 | |
| 21 public Derivative() { | |
| 22 } | |
| 23 | |
| 24 public Derivative(String description) { | |
| 25 this.description = description; | |
| 26 } | |
| 27 | |
| 28 public String getDescription() { | |
| 29 return description; | |
| 30 } | |
| 31 | |
| 32 public abstract org.dive4elements.river.artifacts.math.Function | |
| 33 instantiate(double [] parameters); | |
| 34 | |
| 35 } // interface Derivative | |
| 36 | |
| 37 public Function() { | |
| 38 } | |
| 39 | |
| 40 public Function( | |
| 41 String name, | |
| 42 String description, | |
| 43 String [] parameterNames | |
| 44 ) { | |
| 45 this(name, | |
| 46 description, | |
| 47 parameterNames, | |
| 48 DoubleUtil.fill(parameterNames.length, 1d)); | |
| 49 } | |
| 50 | |
| 51 public Function( | |
| 52 String name, | |
| 53 String description, | |
| 54 String [] parameterNames, | |
| 55 double [] initialGuess | |
| 56 ) { | |
| 57 this.name = name; | |
| 58 this.description = description; | |
| 59 this.parameterNames = parameterNames; | |
| 60 this.initialGuess = initialGuess; | |
| 61 } | |
| 62 | |
| 63 public String getName() { | |
| 64 return name; | |
| 65 } | |
| 66 | |
| 67 public String getDescription() { | |
| 68 return description; | |
| 69 } | |
| 70 | |
| 71 public String [] getParameterNames() { | |
| 72 return parameterNames; | |
| 73 } | |
| 74 | |
| 75 public double [] getInitialGuess() { | |
| 76 return initialGuess; | |
| 77 } | |
| 78 | |
| 79 public org.dive4elements.river.artifacts.math.Function instantiate( | |
| 80 final double [] parameters | |
| 81 ) { | |
| 82 return new org.dive4elements.river.artifacts.math.Function() { | |
| 83 | |
| 84 @Override | |
| 85 public double value(double x) { | |
| 86 try { | |
| 87 return Function.this.value(x, parameters); | |
| 88 } | |
| 89 catch (FunctionEvaluationException fee) { | |
| 90 return Double.NaN; | |
| 91 } | |
| 92 } | |
| 93 }; | |
| 94 } | |
| 95 | |
| 96 public abstract Derivative getDerivative(); | |
| 97 | |
| 98 public abstract Function getInverse(); | |
| 99 } | |
| 100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |