Stats

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## weka.classifiers.trees.j48
Class Stats

    java.lang.Object
      weka.classifiers.trees.j48.Stats

All Implemented Interfaces:
  RevisionHandler

    public class Stats

extends java.lang.Object
implements RevisionHandler

Class implementing a statistical routine needed by J48 to compute its error estimate.

Version:
  $Revision: 1.9 $
Author:
  Eibe Frank (eibe@cs.waikato.ac.nz)

Constructor Summary
`Stats()`

Method Summary
`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).
`java.lang.String` | `getRevision()` Returns the revision string.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Stats

    public Stats()

Method Detail

### 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 java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

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