meta/doxygen/pivoted__length_8h_source.html

 #ifndef META_PIVOTED_LENGTH_H_

 #define META_PIVOTED_LENGTH_H_


 #include "index/ranker/ranker.h"

 #include "index/ranker/ranker_factory.h"


 namespace meta

 {

 namespace index

 {


 class pivoted_length : public ranker

 {

   public:

     const static std::string id;


     const static constexpr double default_s = 0.20;


     pivoted_length(double s = default_s);


     double score_one(const score_data& sd) override;


   private:

     const double s_;

 };


 template <>

 std::unique_ptr<ranker> make_ranker<pivoted_length>(const cpptoml::table&);

 }

 }

 #endif

meta::index::make_ranker< pivoted_length >
std::unique_ptr< ranker > make_ranker< pivoted_length >(const cpptoml::table &)
Specialization of the factory method used to create pivoted_length rankers.
Definition: pivoted_length.cpp:34

ranker.h

meta::index::ranker
A ranker scores a query against all the documents in an inverted index, returning a list of documents...
Definition: ranker.h:41

ranker_factory.h

meta::index::pivoted_length::score_one
double score_one(const score_data &sd) override
Definition: pivoted_length.cpp:22

meta::index::pivoted_length::id
static const std::string id
Identifier for this ranker.
Definition: pivoted_length.h:29

meta
The ModErn Text Analysis toolkit is a suite of natural language processing, classification, information retreival, data mining, and other applications of text processing.
Definition: analyzer.h:24

meta::index::pivoted_length::s_
const double s_
s parameter for pivoted_length normalization
Definition: pivoted_length.h:46

meta::index::pivoted_length
The pivoted document length normalization ranking function.
Definition: pivoted_length.h:25

meta::index::score_data
A score_data object contains information needed to evaluate a ranking function.
Definition: score_data.h:39

meta::index::pivoted_length::default_s
static const constexpr double default_s
Default value of s parameter.
Definition: pivoted_length.h:32

meta::index::pivoted_length::pivoted_length
pivoted_length(double s=default_s)
Definition: pivoted_length.cpp:17