Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Quad.java @ 4479:5fc7df736634
WINFOArtifact: Compute extreme values for cross sections too. Add CS-Facet.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 13 Nov 2012 14:48:57 +0100 |
parents | de67497de5a0 |
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rev | line source |
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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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changeset
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1 package de.intevation.flys.artifacts.math.fitting; |
0dd58ab7e118
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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2 |
0dd58ab7e118
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parents:
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3 public class Quad |
0dd58ab7e118
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4 extends Function |
0dd58ab7e118
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parents:
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5 { |
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6 public static final Derivative DERIVATIVE = |
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7 new Derivative("W'(Q) = 2*n*Q+m") { |
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8 |
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9 @Override |
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10 public de.intevation.flys.artifacts.math.Function |
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11 instantiate(double [] parameters) |
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12 { |
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13 final double n2 = 2d*parameters[0]; |
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14 final double m = parameters[1]; |
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parents:
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15 |
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16 return new de.intevation.flys.artifacts.math.Function() { |
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17 @Override |
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18 public double value(double Q) { |
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19 return n2*Q+m; |
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parents:
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20 } |
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parents:
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21 }; |
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parents:
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22 } |
4dda67a893da
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parents:
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23 }; |
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parents:
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24 |
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Fitting: Link the functions to there inverses via getInverse().
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25 public static final Function INSTANCE = new Quad(); |
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parents:
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26 |
2569
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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27 public Quad() { |
0dd58ab7e118
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parents:
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28 super( |
0dd58ab7e118
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parents:
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29 "quad", |
0dd58ab7e118
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parents:
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30 "W(Q) = n*Q^2 + m*Q + b", |
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parents:
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31 new String [] { "n", "m", "b" }); |
0dd58ab7e118
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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32 } |
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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33 |
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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34 @Override |
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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35 public double value(double x, double [] parameters) { |
0dd58ab7e118
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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36 // 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:
diff
changeset
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37 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
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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 |
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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41 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:
diff
changeset
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42 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:
diff
changeset
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43 } |
3009
4dda67a893da
FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2569
diff
changeset
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44 |
4dda67a893da
FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2569
diff
changeset
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45 @Override |
4dda67a893da
FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2569
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changeset
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46 public Derivative getDerivative() { |
4dda67a893da
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parents:
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47 return DERIVATIVE; |
4dda67a893da
FixA: Added the derivatives of all fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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48 } |
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Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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49 |
585c0b49e696
Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
3009
diff
changeset
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50 @Override |
585c0b49e696
Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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51 public Function getInverse() { |
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Added inverses of the fitting functions.
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parents:
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52 return InvQuad.INSTANCE; |
585c0b49e696
Added inverses of the fitting functions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
3009
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changeset
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53 } |
2569
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
54 } |
0dd58ab7e118
Added functions to be used for fitting in the "Fixierungsanalyse" and "Extremwertermittlung".
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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55 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |