Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/utils/DataUtil.java @ 5838:5aa05a7a34b7

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Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-artifacts/src/main/java/org/dive4elements/river/utils/DataUtil.java@bd047b71ab37
children 4897a58c8746
rev   line source
5831
bd047b71ab37 Repaired internal references
Sascha L. Teichmann <teichmann@intevation.de>
parents: 3076
diff changeset
1 package org.dive4elements.river.utils;
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2e0739853807 Fix build, added new DataUtil.
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2
2e0739853807 Fix build, added new DataUtil.
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3 import java.util.Random;
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4
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03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
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5 import gnu.trove.TDoubleArrayList;
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6
2e0739853807 Fix build, added new DataUtil.
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7 public class DataUtil
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8 {
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03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
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parents: 1163
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9 public static boolean guessWaterIncreasing(TDoubleArrayList data) {
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
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10 return guessWaterIncreasing(data, 0.05f);
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11 }
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12
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03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
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13 public static boolean guessWaterIncreasing(TDoubleArrayList data, float factor) {
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
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14 int N = data.size();
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15 if (N < 2) return false;
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5642a83420f2 FLYS artifacts: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1982
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16
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17 int samples = (int)(factor*N) + 1;
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parents: 1982
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18
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19 int up = 0;
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parents: 1982
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20
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21 Random rand = new Random();
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parents: 1982
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22
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23 for (int i = 0; i < samples; ++i) {
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24 int pos2 = rand.nextInt(N-1) + 1;
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25 int pos1 = rand.nextInt(pos2);
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parents: 1163
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26 double w1 = data.getQuick(pos1);
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parents: 1163
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27 double w2 = data.getQuick(pos2);
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28 if (w2 > w1) ++up;
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29 }
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5642a83420f2 FLYS artifacts: Removed trailing whitespace.
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parents: 1982
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30
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31 return up > samples/2;
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32 }
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33 }
1982
8afd6a9bb244 Cosmetics.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1678
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34 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org