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 and Description
    `DistributionLL()` Sole constructor: parameter-free

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `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 Detail

    - #### DistributionLL

          public DistributionLL()

      Sole constructor: parameter-free

  - ### Method Detail

    - #### 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`

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