1 files changed, 81 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/algorithm/clustering/em/EMClusterModel.java b/src/de/lmu/ifi/dbs/elki/algorithm/clustering/em/EMClusterModel.java
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+package de.lmu.ifi.dbs.elki.algorithm.clustering.em;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2014
+ 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/>.
+ */
+
+import de.lmu.ifi.dbs.elki.data.NumberVector;
+import de.lmu.ifi.dbs.elki.data.model.MeanModel;
+
+/**
+ * Models useable in EM clustering.
+ * 
+ * @author Erich Schubert
+ */
+public interface EMClusterModel<M extends MeanModel> {
+  /**
+   * Begin the E step.
+   */
+  void beginEStep();
+
+  /**
+   * Update the
+   * 
+   * @param vec Vector to process
+   * @param weight Weight
+   */
+  void updateE(NumberVector vec, double weight);
+
+  /**
+   * Finalize the E step.
+   */
+  void finalizeEStep();
+
+  /**
+   * Estimate the likelihood of a vector.
+   * 
+   * @param vec Vector
+   * @return Likelihood.
+   */
+  double estimateDensity(NumberVector vec);
+
+  /**
+   * Finalize a cluster model.
+   * 
+   * @return Cluster model
+   */
+  M finalizeCluster();  
+
+  /**
+   * Get the cluster weight.
+   * 
+   * @return Cluster weight
+   */
+  double getWeight();
+
+  /**
+   * Set the cluster weight.
+   * 
+   * @param weight Cluster weight
+   */
+  void setWeight(double weight);
+}
+\ No newline at end of file