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.

  • Constructor Details

    • DistributionLL

      public DistributionLL()
      Sole constructor: parameter-free
  • Method Details

    • score

      public final float score(BasicStats stats, float tfn, float 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