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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/StdDevOutlier.java @ 5200:42bb6ff78d1b 2.9.11

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Directly set the connectionInitSqls on the datasource Somehow the factory fails to set the connectionInitSqls if we add it to the dbcpProperties. So we now set it directly
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 08 Mar 2013 11:48:33 +0100
parents 846b0441f905
children
rev   line source
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a7d080347ac3 MINFO: Allow two methods for outlier test in SQ relation.
Raimund Renkert <rrenkert@intevation.de>
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1 package de.intevation.flys.artifacts.math;
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2
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3 import java.util.List;
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4
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5 import org.apache.commons.math.stat.descriptive.moment.StandardDeviation;
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6
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7 import org.apache.log4j.Logger;
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8
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9 public class StdDevOutlier
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10 {
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11 public static final double DEFAULT_FACTOR = 3;
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12
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13 private static Logger log = Logger.getLogger(StdDevOutlier.class);
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14
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15 protected StdDevOutlier() {
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16 }
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17
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18 public static Integer findOutlier(List<Double> values) {
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19 return findOutlier(values, DEFAULT_FACTOR, null);
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20 }
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21
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8ee270a3ef25 Small code cleanups in S/Q outlier tests.
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22 public static Integer findOutlier(
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23 List<Double> values,
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24 double factor,
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25 double [] stdDevResult
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26 ) {
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27 boolean debug = log.isDebugEnabled();
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28
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29 if (debug) {
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30 log.debug("factor for std dev: " + factor);
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31 }
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32
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33 int N = values.size();
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34
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35 if (debug) {
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36 log.debug("Values to check: " + N);
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37 }
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38
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39 if (N < 3) {
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40 return null;
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41 }
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42
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43 StandardDeviation stdDev = new StandardDeviation();
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44
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45 double maxValue = -Double.MAX_VALUE;
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46 int maxIndex = -1;
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47 for (int i = N-1; i >= 0; --i) {
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48 double value = Math.abs(values.get(i));
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49 stdDev.increment(value);
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50 if (value > maxValue) {
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51 maxValue = value;
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52 maxIndex = i;
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53 }
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54 }
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55
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56 double sd = stdDev.getResult();
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57
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58 double accepted = factor * sd;
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59
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60 if (debug) {
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61 log.debug("std dev: " + stdDev);
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62 log.debug("accepted: " + accepted);
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63 log.debug("max value: " + maxValue);
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64 }
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65
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66 if (stdDevResult != null) {
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67 stdDevResult[0] = sd;
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68 }
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69
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70 return maxValue > accepted ? maxIndex : null;
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71 }
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72 }
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73 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org