xapian-letor/letor_features.h

   1 /* letor_features.h: The feature manager file.
   2  *
   3  * Copyright (C) 2012 Parth Gupta
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  18  * USA
  19  */
  20
  21 #ifndef LETOR_FEATURES_H
  22 #define LETOR_FEATURES_H
  23
  24 #include <xapian/letor.h>
  25
  26 #include <list>
  27 #include <map>
  28
  29 using namespace std;
  30
  31
  32 namespace Xapian {
  33
  34 class XAPIAN_VISIBILITY_DEFAULT Features {
  35  public:
  36
  37     map<string,long int> termfreq(const Xapian::Document & doc,const Xapian::Query & query);
  38
  39     map<string,double> inverse_doc_freq(const Xapian::Database & db, const Xapian::Query & query);
  40
  41     map<string,long int> doc_length(const Xapian::Database & db, const Xapian::Document & doc);
  42
  43     map<string,long int> collection_length(const Xapian::Database & db);
  44
  45     map<string,long int> collection_termfreq(const Xapian::Database & db, const Xapian::Query & query);
  46
  47     double calculate_f1(const Xapian::Query & query, map<string,long int> & tf,char ch);
  48
  49     double calculate_f2(const Xapian::Query & query, map<string,long int> & tf, map<string,long int> & doc_length, char ch);
  50
  51     double calculate_f3(const Xapian::Query & query, map<string,double> & idf, char ch);
  52
  53     double calculate_f4(const Xapian::Query & query, map<string,long int> & tf, map<string,long int> & coll_len, char ch);
  54
  55     double calculate_f5(const Xapian::Query & query, map<string,long int> & tf, map<string,double> & idf, map<string,long int> & doc_length,char ch);
  56
  57     double calculate_f6(const Xapian::Query & query, map<string,long int> & tf, map<string,long int> & doc_length,map<string,long int> & coll_tf, map<string,long int> & coll_length, char ch);
  58
  59
  60
  61 };
  62
  63 }
  64 #endif /* FEATURES_H */