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annotate flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java @ 1942:be1270c10d9a

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Fix documentation. flys-artifacts/trunk@3323 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Mon, 28 Nov 2011 14:40:05 +0000
parents 03fbf1b30e72
children 8afd6a9bb244
rev   line source
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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1 package de.intevation.flys.utils;
2e0739853807 Fix build, added new DataUtil.
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2
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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
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7 public class DataUtil
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8 {
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03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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>
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10 return guessWaterIncreasing(data, 0.05f);
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11 }
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parents:
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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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16
2e0739853807 Fix build, added new DataUtil.
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17 int samples = (int)(factor*N) + 1;
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18
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19 int up = 0;
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20
2e0739853807 Fix build, added new DataUtil.
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21 Random rand = new Random();
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
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26 double w1 = data.getQuick(pos1);
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
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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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30
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31 return up > samples/2;
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32 }
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33 }
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