weka.core

Class ResampleUtils

java.lang.Object

weka.core.ResampleUtils

public class ResampleUtils
extends java.lang.Object

Helper class for resampling.

Version:

$Revision: 12226 $

Author:

FracPete (fracpete at waikato dot ac dot nz)

Constructor Summary

Constructors

Constructor and Description
ResampleUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	hasInstanceWeights(Instances insts) Checks whether there are any instance weights other than 1.0 set.
static Instances	resampleWithWeightIfNecessary(Instances insts, java.util.Random rand) Resamples the dataset using Instances.resampleWithWeights(Random) if there are any instance weights other than 1.0 set.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResampleUtils

public ResampleUtils()

Method Detail

hasInstanceWeights

public static boolean hasInstanceWeights(Instances insts)

Checks whether there are any instance weights other than 1.0 set.

Parameters:

insts - the dataset to check

Returns:

true if instance weights other than 1.0 are set

resampleWithWeightIfNecessary

public static Instances resampleWithWeightIfNecessary(Instances insts,
                                                      java.util.Random rand)

Resamples the dataset using Instances.resampleWithWeights(Random) if there are any instance weights other than 1.0 set. Simply returns the dataset if no instance weights other than 1.0 are set.

Parameters:

insts - the dataset to resample

rand - the random number generator to use

Returns:

the (potentially) resampled dataset