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 Description

ResampleUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	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