Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/statistics/VectorStatistics.java @ 1108:337727011de0

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Removed duplicate xmlns:xlink definition. gnv-artifacts/trunk@1239 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 29 Jun 2010 08:47:46 +0000
parents 5659b5c5e4b5
children f953c9a559d8
rev   line source
1077
1728aac87717 Added statistics for vectorial timeseries.
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1 package de.intevation.gnv.statistics;
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2
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3 import de.intevation.gnv.geobackend.base.Result;
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4 import de.intevation.gnv.geobackend.base.ResultDescriptor;
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5
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6 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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7
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8 import de.intevation.gnv.statistics.exception.StatisticsException;
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9
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10 import java.sql.SQLException;
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11
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12 import java.util.ArrayList;
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13 import java.util.Collection;
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14 import java.util.Iterator;
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15
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16 import org.apache.commons.math.stat.descriptive.DescriptiveStatistics;
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17
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18 import org.apache.commons.math.stat.regression.SimpleRegression;
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19
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20 import org.apache.log4j.Logger;
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21
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22
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23 /**
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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25 */
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26 public abstract class VectorStatistics
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27 extends AbstractStatistics
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28 {
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29 private static Logger logger =
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30 Logger.getLogger(VectorStatistics.class);
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31
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32 private ResultDescriptor rd;
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33
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34
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35 public VectorStatistics() {
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36 }
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37
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38
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39 public Collection<StatisticSet> calculateStatistics(
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40 Object result,
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41 Collection<KeyValueDescibeData> parameters,
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42 Collection<KeyValueDescibeData> measurements,
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43 Collection<KeyValueDescibeData> dates
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44 ) throws StatisticsException {
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45 if (!(result instanceof Collection))
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46 return new ArrayList<StatisticSet>();
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47
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48 Collection<Result> results = (Collection<Result>) result;
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49 Collection<StatisticSet> stats = new ArrayList<StatisticSet>();
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50
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51 SimpleRegression lRegression = new SimpleRegression();
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52 DescriptiveStatistics lStatistics = new DescriptiveStatistics();
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53
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54 Result previous = null;
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55 Result row = null;
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56 String seriesName = null;
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57 int valueIdx = -1;
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58 int seriesIdx = -1;
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59
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60 Iterator<Result> iter = results.iterator();
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61
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62 while (iter.hasNext()) {
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63 row = iter.next();
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64 previous = previous == null ? row : previous;
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65
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66 if (rd == null || seriesIdx == -1) {
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67 rd = row.getResultDescriptor();
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68 valueIdx = getValueIdx(rd);
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69 seriesIdx = rd.getColumnIndex("SERIES");
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70 }
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71
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72 if (seriesName != null
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73 && !row.getString(seriesIdx).equals(seriesName))
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74 {
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75 stats.add(generateStatisticsValues(
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76 lStatistics, lRegression, seriesName));
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77
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78 lStatistics.clear();
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79 lRegression.clear();
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80
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81 clear();
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82 }
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83
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84 Double yValue = getValue(row, valueIdx);
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85
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86 if (yValue != null) {
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87 lStatistics.addValue(yValue);
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88
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89 try {
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90 double x = calculateXOrdinateValue(previous, row);
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91 lRegression.addData(x, yValue);
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92 }
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93 catch (SQLException sqle) {
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94 logger.warn(sqle, sqle);
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95 }
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96 }
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97
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98 seriesName = row.getString(seriesIdx);
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99 previous = row;
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100 }
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101
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102 if (seriesName != null && row != null) {
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103 stats.add(generateStatisticsValues(
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104 lStatistics, lRegression, seriesName));
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105
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106 lStatistics.clear();
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107 lRegression.clear();
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108 }
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109
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110 return stats;
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111 }
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112
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113
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114 protected Double getValue(Result row, int idx) {
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115 return row.getDouble(idx);
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116 }
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117
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118
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119 abstract protected void clear();
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120
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121 abstract protected int getValueIdx(ResultDescriptor rd);
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122
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123 abstract protected double calculateXOrdinateValue(Result prev, Result now)
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124 throws SQLException;
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125 }
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126 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org