Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/Exp.java @ 5838:5aa05a7a34b7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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/Exp.java@bd047b71ab37
children 4897a58c8746
rev   line source
5831
bd047b71ab37 Repaired internal references
Sascha L. Teichmann <teichmann@intevation.de>
parents: 3201
diff changeset
1 package org.dive4elements.river.artifacts.math.fitting;
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 public class Exp
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
4 extends Function
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
5 {
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
6 public static final Derivative DERIVATIVE =
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
7 new Derivative("W'(Q) = a^Q*log(a)*m") {
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
8
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
9 @Override
5831
bd047b71ab37 Repaired internal references
Sascha L. Teichmann <teichmann@intevation.de>
parents: 3201
diff changeset
10 public org.dive4elements.river.artifacts.math.Function
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
11 instantiate(double [] parameters)
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
12 {
3177
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
13 double m = parameters[0];
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
14 final double a = parameters[1];
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
15 final double logam = Math.log(a)*m;
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
16
5831
bd047b71ab37 Repaired internal references
Sascha L. Teichmann <teichmann@intevation.de>
parents: 3201
diff changeset
17 return new org.dive4elements.river.artifacts.math.Function() {
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
18 @Override
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
19 public double value(double Q) {
3177
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
20 return Math.pow(a, Q)*logam;
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
21 }
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
22 };
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
23 }
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
24 };
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
25
3177
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
26 public static final Function INSTANCE = new Exp();
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
27
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
28 public Exp() {
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
29 super(
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
30 "exp",
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
31 "W(Q) = m * a^Q + b",
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
32 new String [] { "m", "a", "b" });
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
33 }
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
34
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
35 @Override
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
36 public double value(double x, double [] parameters) {
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
37 return parameters[0]*Math.pow(parameters[1], x) + parameters[2];
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
38 }
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
39
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
40 @Override
3201
1c00ed73ccf4 FixA: Fixed da/dQ for exp function but the fitting still does not work.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3177
diff changeset
41 public double [] gradient(double Q, double [] parameters) {
1c00ed73ccf4 FixA: Fixed da/dQ for exp function but the fitting still does not work.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3177
diff changeset
42 double m = parameters[0];
1c00ed73ccf4 FixA: Fixed da/dQ for exp function but the fitting still does not work.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3177
diff changeset
43 double a = parameters[1];
1c00ed73ccf4 FixA: Fixed da/dQ for exp function but the fitting still does not work.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3177
diff changeset
44 double b = parameters[2];
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
45 return new double [] {
3201
1c00ed73ccf4 FixA: Fixed da/dQ for exp function but the fitting still does not work.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3177
diff changeset
46 Math.pow(a, Q),
1c00ed73ccf4 FixA: Fixed da/dQ for exp function but the fitting still does not work.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3177
diff changeset
47 Math.pow(a, Q-1d)*m*Q,
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
48 1d
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
49 };
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
50 }
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
51
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
52 @Override
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
53 public Derivative getDerivative() {
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
54 return DERIVATIVE;
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
55 }
3177
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
56
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
57 @Override
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
58 public Function getInverse() {
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
59 return InvExp.INSTANCE;
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
60 }
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
61 }
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
62 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org