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Diffstat (limited to 'src/de/lmu/ifi/dbs/elki/math/statistics/UniformKernelDensityFunction.java')
-rw-r--r-- | src/de/lmu/ifi/dbs/elki/math/statistics/UniformKernelDensityFunction.java | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/math/statistics/UniformKernelDensityFunction.java b/src/de/lmu/ifi/dbs/elki/math/statistics/UniformKernelDensityFunction.java new file mode 100644 index 00000000..013a5c6b --- /dev/null +++ b/src/de/lmu/ifi/dbs/elki/math/statistics/UniformKernelDensityFunction.java @@ -0,0 +1,50 @@ +package de.lmu.ifi.dbs.elki.math.statistics; +/* +This file is part of ELKI: +Environment for Developing KDD-Applications Supported by Index-Structures + +Copyright (C) 2011 +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/>. +*/ + +/** + * Uniform / Rectangular kernel density estimator. + * + * @author Erich Schubert + */ +public final class UniformKernelDensityFunction implements KernelDensityFunction { + @Override + public double density(double delta) { + if(delta < 1) { + return 0.5; + } + return 0; + } + + /** + * Private, empty constructor. Use the static instance! + */ + private UniformKernelDensityFunction() { + // Nothing to do. + } + + /** + * Static instance. + */ + public static final UniformKernelDensityFunction KERNEL = new UniformKernelDensityFunction(); +} |