A score_data object contains information needed to evaluate a ranking function. More...

#include <score_data.h>

Public Member Functions
	score_data (inverted_index &p_idx, float p_avg_dl, uint64_t p_num_docs, uint64_t p_total_terms, float p_query_length)
	Constructor to initialize most elements. More...

Public Attributes
inverted_index &	idx
	index queries are running on

float	avg_dl
	average document length

uint64_t	num_docs
	total number of documents

uint64_t	total_terms
	total number of terms in the index

float	query_length
	the total length of the query (sum of all term weights)

term_id	t_id
	doc term id

float	query_term_weight
	query term count (or weight in case of feedback)

uint64_t	doc_count
	number of docs that t_id appears in

uint64_t	corpus_term_count
	number of times t_id appears in corpus

doc_id	d_id
	document id

uint64_t	doc_term_count
	number of times the term appears in the current doc

uint64_t	doc_size
	total number of terms in the doc

uint64_t	doc_unique_terms
	number of unique terms in the doc

Detailed Description

A score_data object contains information needed to evaluate a ranking function.

Data is set by the base ranker class as needed, so the derived ranking classes don't make many unncessary calls to the inverted index.

Constructor & Destructor Documentation

meta::index::score_data::score_data	(	inverted_index &	p_idx,
		float	p_avg_dl,
		uint64_t	p_num_docs,
		uint64_t	p_total_terms,
		float	p_query_length
	)

inline

Constructor to initialize most elements.

Parameters

p_idx	The index that is being used
p_avg_dl	The average doc length in the index
p_num_docs	The number of docs in the index
p_total_terms	The total number of terms in the index
p_query_length	The current query length (e.g. the total number of words in the query)

The documentation for this struct was generated from the following file: