Package weka.classifiers.trees.j48

Class Stats

java.lang.Object
weka.classifiers.trees.j48.Stats
All Implemented Interfaces:
RevisionHandler
public class Stats extends Object implements RevisionHandler
Class implementing a statistical routine needed by J48 to compute its error estimate.
Version:
$Revision: 8034 $
Author:
Eibe Frank (eibe@cs.waikato.ac.nz)

  • Constructor Summary

    Constructors
    Constructor
    Description
    Stats()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static double
    addErrs(double N, double e, float CF)
    Computes estimated extra error for given total number of instances and error using normal approximation to binomial distribution (and continuity correction).
    String
    getRevision()
    Returns the revision string.

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Stats

      public Stats()

  • Method Details

    • addErrs

      public static double addErrs(double N, double e, float CF)
      Computes estimated extra error for given total number of instances and error using normal approximation to binomial distribution (and continuity correction).
      Parameters:
      N - number of instances
      e - observed error
      CF - confidence value

    • getRevision

      public String getRevision()
      Returns the revision string.
      Specified by:
      getRevision in interface RevisionHandler
      Returns:
      the revision