Package org.apache.lucene.search.similarities

# Class DistributionLL

java.lang.Object
org.apache.lucene.search.similarities.Distribution
org.apache.lucene.search.similarities.DistributionLL

public class DistributionLL extends Distribution
Log-logistic distribution.

Unlike for DFR, the natural logarithm is used, as it is faster to compute and the original paper does not express any preference to a specific base.

WARNING: This API is experimental and might change in incompatible ways in the next release.

## Constructor Summary

Constructors
Constructor
Description
`DistributionLL()`
Sole constructor: parameter-free

## Method Summary

Modifier and Type
Method
Description
`final double`
`score(BasicStats stats, double tfn, double lambda)`
Computes the score.
`String`
`toString()`
Subclasses must override this method to return the name of the distribution.

### Methods inherited from class org.apache.lucene.search.similarities.Distribution

`explain`

### Methods inherited from class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

## Constructor Details

### DistributionLL

public DistributionLL()
Sole constructor: parameter-free

## Method Details

### score

public final double score(BasicStats stats, double tfn, double lambda)
Description copied from class: `Distribution`
Computes the score.

Specified by:
  `score` in class `Distribution`

### toString

public String toString()
Description copied from class: `Distribution`
Subclasses must override this method to return the name of the distribution.

Specified by:
  `toString` in class `Distribution`