Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/Linear.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 15:23:37 +0200 |
| parents | flys-artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/Linear.java@bd047b71ab37 |
| children | 4897a58c8746 |
comparison
equal
deleted
inserted
replaced
| 5837:d9901a08d0a6 | 5838:5aa05a7a34b7 |
|---|---|
| 1 package org.dive4elements.river.artifacts.math.fitting; | |
| 2 | |
| 3 public class Linear | |
| 4 extends Function | |
| 5 { | |
| 6 public static final Derivative DERIVATIVE = | |
| 7 new Derivative("W'(Q) = m") { | |
| 8 | |
| 9 @Override | |
| 10 public org.dive4elements.river.artifacts.math.Function | |
| 11 instantiate(double [] parameters) | |
| 12 { | |
| 13 final double m = parameters[0]; | |
| 14 | |
| 15 return new org.dive4elements.river.artifacts.math.Function() { | |
| 16 @Override | |
| 17 public double value(double Q) { | |
| 18 return m; | |
| 19 } | |
| 20 }; | |
| 21 } | |
| 22 }; | |
| 23 | |
| 24 public static final Function INSTANCE = new Linear(); | |
| 25 | |
| 26 public Linear() { | |
| 27 super("linear", "W(Q) = m*Q + b", new String [] { "m", "b" }); | |
| 28 } | |
| 29 | |
| 30 @Override | |
| 31 public double value(double x, double [] parameters) { | |
| 32 return x*parameters[0] + parameters[1]; | |
| 33 } | |
| 34 | |
| 35 @Override | |
| 36 public double [] gradient(double x, double [] parameters) { | |
| 37 return new double [] { x, 1d }; | |
| 38 } | |
| 39 | |
| 40 @Override | |
| 41 public Derivative getDerivative() { | |
| 42 return DERIVATIVE; | |
| 43 } | |
| 44 | |
| 45 @Override | |
| 46 public Function getInverse() { | |
| 47 return InvLinear.INSTANCE; | |
| 48 } | |
| 49 } | |
| 50 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |