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MultiRegrMergeMethod.hpp

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/*==========================================================================
 * Copyright (c) 2003 Carnegie Mellon University.  All Rights Reserved.
 *
 * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
 * is subject to the terms of the software license set forth in the LICENSE
 * file included with this software, and also available at
 * http://www.lemurproject.org/license.html
 *
 *==========================================================================
*/

// lsi - created

#ifndef _MULTIREGRMERGEMETHOD_HPP
#define _MULTIREGRMERGEMETHOD_HPP


#define MINOVERLAPDOCNUM 3 

#define MINLESSDBPERCEN 0.4

#define MGETTOPDOCSNUM 10

#include "Param.hpp"
#include "DistMergeMethod.hpp"
#include "InvFPTypes.hpp"


namespace MultiRegrMergeMethodParameter {


  static String csDbDataBaseIndex;

  static void get() {
    csDbDataBaseIndex = ParamGetString("csDbDataBaseIndex","");
  }
};


class MultiRegrMergeMethod : public DistMergeMethod {
public:
  MultiRegrMergeMethod(double constA=0.714, double constB=0.2857);
  ~MultiRegrMergeMethod();

  void mergeScoreSet(const IndexedRealVector &indexset, 
                     const DocScoreVector* const* scoreset, 
                     DocScoreVector &results);
  void calcRegrParams(const IndexedRealVector &indexset, 
                      const DocScoreVector* centralscores, 
                      const DocScoreVector* const* scoresset);

protected:
  virtual double score(double dbscore, double docscore,int dbIndex) const;
  virtual double score(double dbscore, double docscore) const;

  double *parama;
  double *paramb;
  double defParamA;
  double defParamB;
};

#endif

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