Package weka.classifiers.trees.j48
Class Stats
- java.lang.Object
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- weka.classifiers.trees.j48.Stats
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- 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)
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Constructor Summary
Constructors Constructor Description Stats()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods 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).java.lang.String
getRevision()
Returns the revision string.
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Method Detail
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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 instancese
- observed errorCF
- confidence value
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Returns:
- the revision
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