Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java @ 4413:c62598c372ab
FLYSUtils: Null-guard some conditionals (autoboxes).
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Mon, 05 Nov 2012 17:32:59 +0100 |
parents | 5642a83420f2 |
children |
rev | line source |
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1163
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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1 package de.intevation.flys.utils; |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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2 |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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3 import java.util.Random; |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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4 |
1678
03fbf1b30e72
Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1163
diff
changeset
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5 import gnu.trove.TDoubleArrayList; |
1163
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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6 |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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7 public class DataUtil |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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8 { |
1678
03fbf1b30e72
Removed code duplication of guessWaterIncreasing()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1163
diff
changeset
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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
diff
changeset
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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
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15 if (N < 2) return false; |
3076
5642a83420f2
FLYS artifacts: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1982
diff
changeset
|
16 |
1163
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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17 int samples = (int)(factor*N) + 1; |
3076
5642a83420f2
FLYS artifacts: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1982
diff
changeset
|
18 |
1163
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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19 int up = 0; |
3076
5642a83420f2
FLYS artifacts: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1982
diff
changeset
|
20 |
1163
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
|
21 Random rand = new Random(); |
3076
5642a83420f2
FLYS artifacts: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1982
diff
changeset
|
22 |
1163
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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23 for (int i = 0; i < samples; ++i) { |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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24 int pos2 = rand.nextInt(N-1) + 1; |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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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
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28 if (w2 > w1) ++up; |
2e0739853807
Fix build, added new DataUtil.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
|
29 } |
3076
5642a83420f2
FLYS artifacts: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1982
diff
changeset
|
30 |
1163
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 } |
1982
8afd6a9bb244
Cosmetics.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
1678
diff
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34 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |