| Package | Description | 
|---|---|
| org.apache.lucene.search.similarities | 
 This package contains the various ranking models that can be used in Lucene. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
static class  | 
LMSimilarity.DefaultCollectionModel
Models  
p(w|C) as the number of occurrences of the term in the
 collection, divided by the total number of tokens + 1. | 
| Modifier and Type | Field and Description | 
|---|---|
protected LMSimilarity.CollectionModel | 
LMSimilarity.collectionModel
The collection model. 
 | 
| Constructor and Description | 
|---|
LMDirichletSimilarity(LMSimilarity.CollectionModel collectionModel)
Instantiates the similarity with the default μ value of 2000. 
 | 
LMDirichletSimilarity(LMSimilarity.CollectionModel collectionModel,
                     float mu)
Instantiates the similarity with the provided μ parameter. 
 | 
LMJelinekMercerSimilarity(LMSimilarity.CollectionModel collectionModel,
                         float lambda)
Instantiates with the specified collectionModel and λ parameter. 
 | 
LMSimilarity(LMSimilarity.CollectionModel collectionModel)
Creates a new instance with the specified collection language model. 
 | 
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