diff options
author | Andrej Shadura <andrewsh@debian.org> | 2019-03-09 22:30:32 +0000 |
---|---|---|
committer | Andrej Shadura <andrewsh@debian.org> | 2019-03-09 22:30:32 +0000 |
commit | c36aa2a8fd31ca5e225ff30278e910070cd2c8c1 (patch) | |
tree | bdfe1a5ccb57999d4d664a2a44121a78c88b19d4 /src/tutorial/distancefunction/TutorialDistanceFunction.java | |
parent | 89aa1958dbaf9052da0c24706308a2ef8cefa96e (diff) |
Import Upstream version 0.5.0~beta2
Diffstat (limited to 'src/tutorial/distancefunction/TutorialDistanceFunction.java')
-rw-r--r-- | src/tutorial/distancefunction/TutorialDistanceFunction.java | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/tutorial/distancefunction/TutorialDistanceFunction.java b/src/tutorial/distancefunction/TutorialDistanceFunction.java new file mode 100644 index 00000000..0b225c61 --- /dev/null +++ b/src/tutorial/distancefunction/TutorialDistanceFunction.java @@ -0,0 +1,50 @@ +package tutorial.distancefunction; + +import de.lmu.ifi.dbs.elki.data.NumberVector; +import de.lmu.ifi.dbs.elki.data.type.SimpleTypeInformation; +import de.lmu.ifi.dbs.elki.data.type.VectorFieldTypeInformation; +import de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractVectorDoubleDistanceFunction; + +/* + This file is part of ELKI: + Environment for Developing KDD-Applications Supported by Index-Structures + + Copyright (C) 2012 + Ludwig-Maximilians-Universität München + Lehr- und Forschungseinheit für Datenbanksysteme + ELKI Development Team + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/** + * Tutorial example for ELKI. + * + * See <a href="http://elki.dbs.ifi.lmu.de/wiki/Tutorial/DistanceFunctions">Distance function tutorial</a> + * + * @author Erich Schubert + */ +public class TutorialDistanceFunction extends AbstractVectorDoubleDistanceFunction { + @Override + public double doubleDistance(NumberVector<?, ?> o1, NumberVector<?, ?> o2) { + double dx = (o1.doubleValue(1) - o2.doubleValue(1)); + double dy = (o1.doubleValue(2) - o2.doubleValue(2)); + return dx * dx + Math.abs(dy); + } + + @Override + public SimpleTypeInformation<? super NumberVector<?, ?>> getInputTypeRestriction() { + return new VectorFieldTypeInformation<NumberVector<?, ?>>(NumberVector.class, 2); + } +}
\ No newline at end of file |