Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Quad.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 59b14bc676ec
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:
diff changeset
1 package de.intevation.flys.artifacts.math.fitting;
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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2
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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3 public class Quad
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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4 extends Function
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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5 {
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4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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6 public static final Derivative DERIVATIVE =
4dda67a893da FixA: Added the derivatives of all fitting functions.
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parents: 2569
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7 new Derivative("W'(Q) = 2*n*Q+m") {
4dda67a893da FixA: Added the derivatives of all fitting functions.
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parents: 2569
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8
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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9 @Override
4dda67a893da FixA: Added the derivatives of all fitting functions.
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10 public de.intevation.flys.artifacts.math.Function
4dda67a893da FixA: Added the derivatives of all fitting functions.
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11 instantiate(double [] parameters)
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parents: 2569
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12 {
4dda67a893da FixA: Added the derivatives of all fitting functions.
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13 final double n = parameters[0];
4dda67a893da FixA: Added the derivatives of all fitting functions.
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parents: 2569
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14 final double m = parameters[1];
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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15
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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16 return new de.intevation.flys.artifacts.math.Function() {
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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17 @Override
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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18 public double value(double Q) {
4dda67a893da FixA: Added the derivatives of all fitting functions.
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parents: 2569
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19 return 2*n*Q+m;
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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20 }
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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21 };
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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22 }
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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23 };
4dda67a893da FixA: Added the derivatives of all fitting functions.
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parents: 2569
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24
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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25 public Quad() {
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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26 super(
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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27 "quad",
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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28 "W(Q) = n*Q^2 + m*Q + b",
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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29 new String [] { "n", "m", "b" });
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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30 }
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
31
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
32 @Override
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
33 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:
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34 // n*Q^2 + m*Q + b <=> Q*(n*Q + m) + b
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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35 return x*(parameters[0]*x + parameters[1]) + 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
36 }
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
37
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
38 @Override
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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39 public double [] gradient(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:
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40 return new double [] { x*x, x, 1d };
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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41 }
3009
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
42
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
43 @Override
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
diff changeset
44 public Derivative getDerivative() {
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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45 return DERIVATIVE;
4dda67a893da FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2569
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46 }
3177
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
47
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
diff changeset
48 @Override
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
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49 public Function getInverse() {
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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50 return InvQuad.INSTANCE;
585c0b49e696 Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3009
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51 }
2569
0dd58ab7e118 Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
52 }
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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53 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org