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annotate flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java @ 1163:2e0739853807

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Fix build, added new DataUtil. flys-artifacts/trunk@2700 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Mon, 12 Sep 2011 11:30:19 +0000
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children 03fbf1b30e72
rev   line source
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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1 package de.intevation.flys.utils;
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2
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3 import java.util.Random;
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4
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5 import de.intevation.flys.artifacts.model.WKms;
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7 public class DataUtil
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8 {
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9 // TODO: resolve duplicate in WQKms
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10 public static boolean guessWaterIncreasing(WKms wkms) {
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11 return guessWaterIncreasing(wkms, 0.05f);
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12 }
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13
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14 // TODO: resolve duplicate in WQKms
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15 public static boolean guessWaterIncreasing(WKms wkms, float factor) {
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16 int N = wkms.size();
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17 if (N < 2) return false;
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18
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19 int samples = (int)(factor*N) + 1;
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20
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21 int up = 0;
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22
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23 Random rand = new Random();
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24
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25 for (int i = 0; i < samples; ++i) {
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26 int pos2 = rand.nextInt(N-1) + 1;
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27 if (pos2 == 0) continue;
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28 int pos1 = rand.nextInt(pos2);
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29 double w1 = wkms.getW(pos1);
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30 double w2 = wkms.getW(pos2);
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31 if (w2 > w1) ++up;
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32 }
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33
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34 return up > samples/2;
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35 }
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36 }
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