## Uses of Class
org.apache.lucene.search.CollectionStatistics

Packages that use CollectionStatistics
org.apache.lucene.search: Code to search indices.
org.apache.lucene.search.similarities: This package contains the various ranking models that can be used in Lucene.

Uses of CollectionStatistics in org.apache.lucene.search

Methods in org.apache.lucene.search that return CollectionStatistics
`CollectionStatistics` `IndexSearcher.collectionStatistics(String field)` Returns `CollectionStatistics` for a field.

Uses of CollectionStatistics in org.apache.lucene.search.similarities

Methods in org.apache.lucene.search.similarities with parameters of type CollectionStatistics
`protected float` `BM25Similarity.avgFieldLength(CollectionStatistics collectionStats)` The default implementation computes the average as `sumTotalTermFreq / maxDoc`, or returns `1` if the index does not store sumTotalTermFreq (Lucene 3.x indexes or any field that omits frequency information).
`Similarity.SimWeight` `TFIDFSimilarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)`
`Similarity.SimWeight` `SimilarityBase.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)`
`abstract Similarity.SimWeight` `Similarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)` Compute any collection-level weight (e.g.
`Similarity.SimWeight` `PerFieldSimilarityWrapper.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)`
`Similarity.SimWeight` `MultiSimilarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)`
`Similarity.SimWeight` `BM25Similarity.computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats)`
`protected void` `SimilarityBase.fillBasicStats(BasicStats stats, CollectionStatistics collectionStats, TermStatistics termStats)` Fills all member fields defined in `BasicStats` in `stats`.
`protected void` `LMSimilarity.fillBasicStats(BasicStats stats, CollectionStatistics collectionStats, TermStatistics termStats)` Computes the collection probability of the current term in addition to the usual statistics.
`Explanation` `TFIDFSimilarity.idfExplain(CollectionStatistics collectionStats, TermStatistics termStats)` Computes a score factor for a simple term and returns an explanation for that score factor.
`Explanation` `BM25Similarity.idfExplain(CollectionStatistics collectionStats, TermStatistics termStats)` Computes a score factor for a simple term and returns an explanation for that score factor.
`Explanation` `TFIDFSimilarity.idfExplain(CollectionStatistics collectionStats, TermStatistics[] termStats)` Computes a score factor for a phrase.
`Explanation` `BM25Similarity.idfExplain(CollectionStatistics collectionStats, TermStatistics[] termStats)` Computes a score factor for a phrase.

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