Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java @ 3772:5a8f8fd5310c
The usual wipe after for ill configured Eclipses.
flys-artifacts/trunk@5477 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sat, 15 Sep 2012 18:11:51 +0000 |
parents | 5642a83420f2 |
children |
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package de.intevation.flys.utils; import java.util.Random; import gnu.trove.TDoubleArrayList; public class DataUtil { public static boolean guessWaterIncreasing(TDoubleArrayList data) { return guessWaterIncreasing(data, 0.05f); } public static boolean guessWaterIncreasing(TDoubleArrayList data, float factor) { int N = data.size(); if (N < 2) return false; int samples = (int)(factor*N) + 1; int up = 0; Random rand = new Random(); for (int i = 0; i < samples; ++i) { int pos2 = rand.nextInt(N-1) + 1; int pos1 = rand.nextInt(pos2); double w1 = data.getQuick(pos1); double w2 = data.getQuick(pos2); if (w2 > w1) ++up; } return up > samples/2; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :