Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/MovingAverage.java @ 5818:a4ff4167be1e

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Request feature info on all layers and show it as html if the server does not return valid gml. Non queryable layers produce an error message when the request fails. This is good enough
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 24 Apr 2013 17:33:27 +0200
parents fb9892036bd6
children
rev   line source
4630
63368dcc3f94 Moved MovingAverage into math package
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4625
diff changeset
1 package de.intevation.flys.artifacts.math;
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d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
Raimund Renkert <rrenkert@intevation.de>
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2
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3 import java.util.Map;
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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4 import java.util.SortedMap;
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5 import java.util.TreeMap;
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6
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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7
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8 public class MovingAverage
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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9 {
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10
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11 public static double[][] simple(double[][] values, double radius) {
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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12 TreeMap<Double, Double> map = toMap(values);
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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13 int N = map.size();
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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14 double [] xs = new double[N];
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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15 double [] ys = new double[N];
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16 int ndx = 0;
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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17 for (double x: map.keySet()) {
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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18 SortedMap<Double, Double> range =
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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19 map.subMap(x-radius, true, x+radius, true);
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20 double avg = 0d;
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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21 for (double v: range.values()) {
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22 avg += v;
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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23 }
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24 avg /= range.size();
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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parents: 4630
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25 xs[ndx] = x;
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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26 ys[ndx] = avg;
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27 ndx++;
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28 }
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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parents: 4630
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29 return new double [][] { xs, ys };
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30 }
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31
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32 public static double[][] weighted(double[][] values, double radius) {
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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33 TreeMap<Double, Double> map = toMap(values);
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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34 int N = map.size();
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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35 double [] xs = new double[N];
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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36 double [] ys = new double[N];
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37 int ndx = 0;
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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38 double _1radius = 1d/radius;
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39 for (double x: map.keySet()) {
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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40 double avg = 0d;
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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41 double weights = 0d;
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42 for (Map.Entry<Double, Double> e:
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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43 map.subMap(x-radius, false, x+radius, false).entrySet()
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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44 ) {
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
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45 double weight = 1d - Math.abs(x - e.getKey())*_1radius;
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46 avg += weight*e.getValue();
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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47 weights += weight;
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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48 }
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49 avg /= weights;
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4630
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50 xs[ndx] = x;
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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parents: 4630
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51 ys[ndx] = avg;
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52 ndx++;
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53 }
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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parents: 4630
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54 return new double [][] { xs, ys };
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55 }
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56
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57 private static TreeMap<Double, Double> toMap(double[][] values) {
d6d16b5ab2f0 New class for average calculation implementing moving average algorithms.
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58 TreeMap<Double, Double> map = new TreeMap<Double, Double>();
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d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
Sascha L. Teichmann <teichmann@intevation.de>
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59 double [] xs = values[0];
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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60 double [] ys = values[1];
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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61 for (int i = 0; i < xs.length; i++) {
d35d316049e8 A little optimization and handle the case that there are duplicates in the values.
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62 map.put(xs[i], ys[i]);
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63 }
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64 return map;
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65 }
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66 }
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fb9892036bd6 Added vimline.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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67 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org