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SingleRegrMergeMethod.hpp

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/*==========================================================================
 * Copyright (c) 2001 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
 *
 *==========================================================================
*/

#ifndef _SINGLEREGRMERGEMETHOD_HPP
#define _SINGLEREGRMERGEMETHOD_HPP


#define MINOVERLAPDOCNUM 3 

#define MINLESSDBPERCEN 0.4

#define GETTOPDOCSNUM 20

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


namespace SingleRegrMergeMethodParameter {


  static String csDbDataBaseIndex;

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


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

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

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

  double parama;
  double paramb;
};

#endif

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