Package org.apache.lucene.search.similarities

Class BasicModelP

java.lang.Object
org.apache.lucene.search.similarities.BasicModel
org.apache.lucene.search.similarities.BasicModelP
public class BasicModelP extends BasicModel
Implements the Poisson approximation for the binomial model for DFR.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected static double
    LOG2_E
    log2(Math.E), precomputed.

  • Constructor Summary

    Constructors
    Constructor
    Description
    BasicModelP()
    Sole constructor: parameter-free

  • Method Summary

    Modifier and Type
    Method
    Description
    final float
    score(BasicStats stats, float tfn)
    Returns the informative content score.
    String
    toString()
    Subclasses must override this method to return the code of the basic model formula.

    Methods inherited from class org.apache.lucene.search.similarities.BasicModel

    explain

    Methods inherited from class java.lang.Object

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

  • Field Details

    • LOG2_E

      protected static double LOG2_E
      log2(Math.E), precomputed.

  • Constructor Details

    • BasicModelP

      public BasicModelP()
      Sole constructor: parameter-free

  • Method Details

    • score

      public final float score(BasicStats stats, float tfn)
      Description copied from class: BasicModel
      Returns the informative content score.
      Specified by:
      score in class BasicModel

    • toString

      public String toString()
      Description copied from class: BasicModel
      Subclasses must override this method to return the code of the basic model formula. Refer to the original paper for the list.
      Specified by:
      toString in class BasicModel