Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java @ 1747:d2a17e990c70

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Improved the Themes: we now support special themes for facets which need to match a given pattern string. flys-artifacts/trunk@3047 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 20 Oct 2011 13:45:45 +0000
parents 03fbf1b30e72
children 8afd6a9bb244
rev   line source
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.utils;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
2
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
3 import java.util.Random;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
4
1678
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
5 import gnu.trove.TDoubleArrayList;
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
6
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
7 public class DataUtil
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
8 {
1678
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
9 public static boolean guessWaterIncreasing(TDoubleArrayList data) {
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
10 return guessWaterIncreasing(data, 0.05f);
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
11 }
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
12
1678
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
13 public static boolean guessWaterIncreasing(TDoubleArrayList data, float factor) {
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
14 int N = data.size();
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
15 if (N < 2) return false;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
16
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
17 int samples = (int)(factor*N) + 1;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
18
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
19 int up = 0;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
20
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
21 Random rand = new Random();
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
22
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
23 for (int i = 0; i < samples; ++i) {
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
24 int pos2 = rand.nextInt(N-1) + 1;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
25 int pos1 = rand.nextInt(pos2);
1678
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
26 double w1 = data.getQuick(pos1);
03fbf1b30e72 Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1163
diff changeset
27 double w2 = data.getQuick(pos2);
1163
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
28 if (w2 > w1) ++up;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
29 }
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
30
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
31 return up > samples/2;
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
32 }
2e0739853807 Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
33 }
http://dive4elements.wald.intevation.org