java.lang.Object
- weka.filters.Filter
- - weka.filters.supervised.instance.SMOTE

All Implemented Interfaces:: java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, TechnicalInformationHandler, SupervisedFilter

public class SMOTE
extends Filter
implements SupervisedFilter, OptionHandler, TechnicalInformationHandler

Resamples a dataset by applying the Synthetic Minority Oversampling TEchnique (SMOTE). The original dataset must fit entirely in memory. The amount of SMOTE and number of nearest neighbors may be specified. For more information, see

Nitesh V. Chawla et. al. (2002). Synthetic Minority Over-sampling Technique. Journal of Artificial Intelligence Research. 16:321-357.

BibTeX:

 @article{al.2002,
    author = {Nitesh V. Chawla et. al.},
    journal = {Journal of Artificial Intelligence Research},
    pages = {321-357},
    title = {Synthetic Minority Over-sampling Technique},
    volume = {16},
    year = {2002}
 }

Valid options are:

 -S <num>
  Specifies the random number seed
  (default 1)

 -P <percentage>
  Specifies percentage of SMOTE instances to create.
  (default 100.0)

 -K <nearest-neighbors>
  Specifies the number of nearest neighbors to use.
  (default 5)

 -C <value-index>
  Specifies the index of the nominal class value to SMOTE
  (default 0: auto-detect non-empty minority class))

Version:: $Revision: 9657 $
Author:: Ryan Lichtenwalter (rlichtenwalter@gmail.com)
See Also:: Serialized Form

Constructor Summary

Constructors
Constructor Description

SMOTE()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`batchFinished()`	Signify that this batch of input to the filter is finished.
`java.lang.String`	`classValueTipText()`	Returns the tip text for this property.
`Capabilities`	`getCapabilities()`	Returns the Capabilities of this filter.
`java.lang.String`	`getClassValue()`	Gets the index of the class value to which SMOTE should be applied.
`int`	`getNearestNeighbors()`	Gets the number of nearest neighbors to use.
`java.lang.String[]`	`getOptions()`	Gets the current settings of the filter.
`double`	`getPercentage()`	Gets the percentage of SMOTE instances to create.
`int`	`getRandomSeed()`	Gets the random number seed.
`java.lang.String`	`getRevision()`	Returns the revision string.
`TechnicalInformation`	`getTechnicalInformation()`	Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
`java.lang.String`	`globalInfo()`	Returns a string describing this classifier.
`boolean`	`input(Instance instance)`	Input an instance for filtering.
`java.util.Enumeration`	`listOptions()`	Returns an enumeration describing the available options.
`static void`	`main(java.lang.String[] args)`	Main method for running this filter.
`java.lang.String`	`nearestNeighborsTipText()`	Returns the tip text for this property.
`java.lang.String`	`percentageTipText()`	Returns the tip text for this property.
`java.lang.String`	`randomSeedTipText()`	Returns the tip text for this property.
`void`	`setClassValue(java.lang.String value)`	Sets the index of the class value to which SMOTE should be applied.
`boolean`	`setInputFormat(Instances instanceInfo)`	Sets the format of the input instances.
`void`	`setNearestNeighbors(int value)`	Sets the number of nearest neighbors to use.
`void`	`setOptions(java.lang.String[] options)`	Parses a given list of options.
`void`	`setPercentage(double value)`	Sets the percentage of SMOTE instances to create.
`void`	`setRandomSeed(int value)`	Sets the random number seed.

Methods inherited from class weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper

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

- Constructor Detail
  - SMOTE
```
public SMOTE()
```
- Method Detail
  - globalInfo
```
public java.lang.String globalInfo()
```
    Returns a string describing this classifier.
    
    Returns:
    
    a description of the classifier suitable for displaying in the explorer/experimenter gui
  - getTechnicalInformation
```
public TechnicalInformation getTechnicalInformation()
```
    Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
    
    Specified by:
    
    getTechnicalInformation in interface TechnicalInformationHandler
    
    Returns:
    
    the technical information about this class
  - getRevision
```
public java.lang.String getRevision()
```
    Returns the revision string.
    
    Specified by:
    
    getRevision in interface RevisionHandler
    
    Overrides:
    
    getRevision in class Filter
    
    Returns:
    
    the revision
  - getCapabilities
```
public Capabilities getCapabilities()
```
    Returns the Capabilities of this filter.
    
    Specified by:
    
    getCapabilities in interface CapabilitiesHandler
    
    Overrides:
    
    getCapabilities in class Filter
    
    Returns:
    
    the capabilities of this object
    
    See Also:
    
    Capabilities
  - listOptions
```
public java.util.Enumeration listOptions()
```
    Returns an enumeration describing the available options.
    
    Specified by:
    
    listOptions in interface OptionHandler
    
    Returns:
    
    an enumeration of all the available options.
  - setOptions
```
public void setOptions(java.lang.String[] options)
                throws java.lang.Exception
```
    Parses a given list of options. Valid options are:
    
    -S <num> Specifies the random number seed (default 1)
    
    -P <percentage> Specifies percentage of SMOTE instances to create. (default 100.0)
    
    -K <nearest-neighbors> Specifies the number of nearest neighbors to use. (default 5)
    
    -C <value-index> Specifies the index of the nominal class value to SMOTE (default 0: auto-detect non-empty minority class))
    Specified by:
    
    setOptions in interface OptionHandler
    
    Parameters:
    
    options - the list of options as an array of strings
    
    Throws:
    
    java.lang.Exception - if an option is not supported
  - getOptions
```
public java.lang.String[] getOptions()
```
    Gets the current settings of the filter.
    
    Specified by:
    
    getOptions in interface OptionHandler
    
    Returns:
    
    an array of strings suitable for passing to setOptions
  - randomSeedTipText
```
public java.lang.String randomSeedTipText()
```
    Returns the tip text for this property.
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getRandomSeed
```
public int getRandomSeed()
```
    Gets the random number seed.
    
    Returns:
    
    the random number seed.
  - setRandomSeed
```
public void setRandomSeed(int value)
```
    Sets the random number seed.
    
    Parameters:
    
    value - the new random number seed.
  - percentageTipText
```
public java.lang.String percentageTipText()
```
    Returns the tip text for this property.
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - setPercentage
```
public void setPercentage(double value)
```
    Sets the percentage of SMOTE instances to create.
    
    Parameters:
    
    value - the percentage to use
  - getPercentage
```
public double getPercentage()
```
    Gets the percentage of SMOTE instances to create.
    
    Returns:
    
    the percentage of SMOTE instances to create
  - nearestNeighborsTipText
```
public java.lang.String nearestNeighborsTipText()
```
    Returns the tip text for this property.
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - setNearestNeighbors
```
public void setNearestNeighbors(int value)
```
    Sets the number of nearest neighbors to use.
    
    Parameters:
    
    value - the number of nearest neighbors to use
  - getNearestNeighbors
```
public int getNearestNeighbors()
```
    Gets the number of nearest neighbors to use.
    
    Returns:
    
    the number of nearest neighbors to use
  - classValueTipText
```
public java.lang.String classValueTipText()
```
    Returns the tip text for this property.
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - setClassValue
```
public void setClassValue(java.lang.String value)
```
    Sets the index of the class value to which SMOTE should be applied.
    
    Parameters:
    
    value - the class value index
  - getClassValue
```
public java.lang.String getClassValue()
```
    Gets the index of the class value to which SMOTE should be applied.
    
    Returns:
    
    the index of the clas value to which SMOTE should be applied
  - setInputFormat
```
public boolean setInputFormat(Instances instanceInfo)
                       throws java.lang.Exception
```
    Sets the format of the input instances.
    
    Overrides:
    
    setInputFormat in class Filter
    
    Parameters:
    
    instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).
    
    Returns:
    
    true if the outputFormat may be collected immediately
    
    Throws:
    
    java.lang.Exception - if the input format can't be set successfully
  - input
```
public boolean input(Instance instance)
```
    Input an instance for filtering. Filter requires all training instances be read before producing output.
    
    Overrides:
    
    input in class Filter
    
    Parameters:
    
    instance - the input instance
    
    Returns:
    
    true if the filtered instance may now be collected with output().
    
    Throws:
    
    java.lang.IllegalStateException - if no input structure has been defined
  - batchFinished
```
public boolean batchFinished()
                      throws java.lang.Exception
```
    Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances.
    
    Overrides:
    
    batchFinished in class Filter
    
    Returns:
    
    true if there are instances pending output
    
    Throws:
    
    java.lang.IllegalStateException - if no input structure has been defined
    
    java.lang.Exception - if provided options cannot be executed on input instances
  - main
```
public static void main(java.lang.String[] args)
```
    Main method for running this filter.
    
    Parameters:
    
    args - should contain arguments to the filter: use -h for help

Class SMOTE

Constructor Summary

Method Summary

Methods inherited from class weka.filters.Filter

Methods inherited from class java.lang.Object

Constructor Detail

SMOTE

Method Detail

globalInfo

getTechnicalInformation

getRevision

getCapabilities

listOptions

setOptions

getOptions

randomSeedTipText

getRandomSeed

setRandomSeed

percentageTipText

setPercentage

getPercentage

nearestNeighborsTipText

setNearestNeighbors

getNearestNeighbors

classValueTipText

setClassValue

getClassValue

setInputFormat

input

batchFinished

main