Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQ.java @ 744:b385577bcaca
WQ: Added a method to guess is increasing.
flys-artifacts/trunk@2246 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 27 Jun 2011 09:17:41 +0000 |
| parents | cbaa3ca86f2f |
| children | 30be4b71c36c |
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--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQ.java Mon Jun 27 07:45:32 2011 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQ.java Mon Jun 27 09:17:41 2011 +0000 @@ -2,6 +2,8 @@ import gnu.trove.TDoubleArrayList; +import java.util.Random; + public class WQ extends NamedObject { @@ -103,5 +105,29 @@ public void removeNaNs() { removeNaNs(new TDoubleArrayList [] { w, q }); } + + public boolean guessWaterIncreasing() { + return guessWaterIncreasing(0.05f); + } + + public boolean guessWaterIncreasing(float factor) { + + int N = w.size(); + int samples = (int)(factor*N) + 1; + + int up = 0; + + Random rand = new Random(); + + for (int i = 0; i < samples; ++i) { + int pos = rand.nextInt(N-1) + 1; + double w1 = w.getQuick(pos-1); + double w2 = w.getQuick(pos); + if (w2 > w1) ++up; + } + + return up > samples/2; + } + } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :