AgglomCluster.hpp Source File

00001 /*==========================================================================
00002  * Copyright (c) 2002 University of Massachusetts.  All Rights Reserved.
00003  *
00004  * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
00005  * is subject to the terms of the software license set forth in the LICENSE
00006  * file included with this software, and also available at
00007  * http://www.lemurproject.org/license.html
00008  *
00009  *==========================================================================
00010 */
00011 
00012 // David Fisher
00013 // init: 11/18/2002
00014 // Agglomerative clustering algorithms.
00015 #ifndef _AGGLOMCLUSTER_HPP
00016 #define _AGGLOMCLUSTER_HPP
00017 #include "Cluster.hpp"
00018 
00021 class AgglomCluster: public Cluster
00022 {
00023 public:
00025   AgglomCluster(int cid, const Index &ind, const SimilarityMethod &sim, 
00026                 enum ClusterParam::docModes mode): 
00027     Cluster(cid, ind, sim), docmode(mode) {}
00029   virtual ~AgglomCluster() {};
00031   virtual double score(const ClusterRep *rep) const;
00035   virtual ClusterRep *getClusterRep() const;
00037   virtual double sum2() const;
00038   
00039 private:
00040   enum ClusterParam::docModes docmode;
00042   double score_min(const ClusterRep *rep) const;
00044   double score_max(const ClusterRep *rep) const;
00046   double score_mean(const ClusterRep *rep) const;
00048   double score_ave(const ClusterRep *rep) const;
00049 };
00050 
00051 #endif