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

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

public class StratifiedRemoveFolds
extends Filter
implements SupervisedFilter, OptionHandler

This filter takes a dataset and outputs a specified fold for cross validation. If you do not want the folds to be stratified use the unsupervised version.

Valid options are:

 -V
  Specifies if inverse of selection is to be output.

 -N <number of folds>
  Specifies number of folds dataset is split into. 
  (default 10)

 -F <fold>
  Specifies which fold is selected. (default 1)

 -S <seed>
  Specifies random number seed. (default 0, no randomizing)

Version:: $Revision: 5542 $
Author:: Eibe Frank (eibe@cs.waikato.ac.nz)
See Also:: Serialized Form

Constructor Summary

Constructors
Constructor Description

StratifiedRemoveFolds()

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`	`foldTipText()`	Returns the tip text for this property
`Capabilities`	`getCapabilities()`	Returns the Capabilities of this filter.
`int`	`getFold()`	Gets the fold which is selected.
`boolean`	`getInvertSelection()`	Gets if selection is to be inverted.
`int`	`getNumFolds()`	Gets the number of folds in which dataset is to be split into.
`java.lang.String[]`	`getOptions()`	Gets the current settings of the filter.
`java.lang.String`	`getRevision()`	Returns the revision string.
`long`	`getSeed()`	Gets the random number seed used for shuffling the dataset.
`java.lang.String`	`globalInfo()`	Returns a string describing this filter
`boolean`	`input(Instance instance)`	Input an instance for filtering.
`java.lang.String`	`invertSelectionTipText()`	Returns the tip text for this property
`java.util.Enumeration`	`listOptions()`	Gets an enumeration describing the available options..
`static void`	`main(java.lang.String[] argv)`	Main method for testing this class.
`java.lang.String`	`numFoldsTipText()`	Returns the tip text for this property
`java.lang.String`	`seedTipText()`	Returns the tip text for this property
`void`	`setFold(int fold)`	Selects a fold.
`boolean`	`setInputFormat(Instances instanceInfo)`	Sets the format of the input instances.
`void`	`setInvertSelection(boolean inverse)`	Sets if selection is to be inverted.
`void`	`setNumFolds(int numFolds)`	Sets the number of folds the dataset is split into.
`void`	`setOptions(java.lang.String[] options)`	Parses a given list of options.
`void`	`setSeed(long seed)`	Sets the random number seed for shuffling the dataset.

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
  - StratifiedRemoveFolds
```
public StratifiedRemoveFolds()
```
- Method Detail
  - listOptions
```
public java.util.Enumeration listOptions()
```
    Gets 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:
    
    -V Specifies if inverse of selection is to be output.
    
    -N <number of folds> Specifies number of folds dataset is split into. (default 10)
    
    -F <fold> Specifies which fold is selected. (default 1)
    
    -S <seed> Specifies random number seed. (default 0, no randomizing)
    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
  - globalInfo
```
public java.lang.String globalInfo()
```
    Returns a string describing this filter
    
    Returns:
    
    a description of the filter suitable for displaying in the explorer/experimenter gui
  - invertSelectionTipText
```
public java.lang.String invertSelectionTipText()
```
    Returns the tip text for this property
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getInvertSelection
```
public boolean getInvertSelection()
```
    Gets if selection is to be inverted.
    
    Returns:
    
    true if the selection is to be inverted
  - setInvertSelection
```
public void setInvertSelection(boolean inverse)
```
    Sets if selection is to be inverted.
    
    Parameters:
    
    inverse - true if inversion is to be performed
  - numFoldsTipText
```
public java.lang.String numFoldsTipText()
```
    Returns the tip text for this property
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getNumFolds
```
public int getNumFolds()
```
    Gets the number of folds in which dataset is to be split into.
    
    Returns:
    
    the number of folds the dataset is to be split into.
  - setNumFolds
```
public void setNumFolds(int numFolds)
```
    Sets the number of folds the dataset is split into. If the number of folds is zero, it won't split it into folds.
    
    Parameters:
    
    numFolds - number of folds dataset is to be split into
    
    Throws:
    
    java.lang.IllegalArgumentException - if number of folds is negative
  - foldTipText
```
public java.lang.String foldTipText()
```
    Returns the tip text for this property
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getFold
```
public int getFold()
```
    Gets the fold which is selected.
    
    Returns:
    
    the fold which is selected
  - setFold
```
public void setFold(int fold)
```
    Selects a fold.
    
    Parameters:
    
    fold - the fold to be selected.
    
    Throws:
    
    java.lang.IllegalArgumentException - if fold's index is smaller than 1
  - seedTipText
```
public java.lang.String seedTipText()
```
    Returns the tip text for this property
    
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getSeed
```
public long getSeed()
```
    Gets the random number seed used for shuffling the dataset.
    
    Returns:
    
    the random number seed
  - setSeed
```
public void setSeed(long seed)
```
    Sets the random number seed for shuffling the dataset. If seed is negative, shuffling won't be performed.
    
    Parameters:
    
    seed - the random number seed
  - 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
  - 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 because outputFormat can 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()
```
    Signify that this batch of input to the filter is finished. 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
  - getRevision
```
public java.lang.String getRevision()
```
    Returns the revision string.
    
    Specified by:
    
    getRevision in interface RevisionHandler
    
    Overrides:
    
    getRevision in class Filter
    
    Returns:
    
    the revision
  - main
```
public static void main(java.lang.String[] argv)
```
    Main method for testing this class.
    
    Parameters:
    
    argv - should contain arguments to the filter: use -h for help

Class StratifiedRemoveFolds

Constructor Summary

Method Summary

Methods inherited from class weka.filters.Filter

Methods inherited from class java.lang.Object

Constructor Detail

StratifiedRemoveFolds

Method Detail

listOptions

setOptions

getOptions

globalInfo

invertSelectionTipText

getInvertSelection

setInvertSelection

numFoldsTipText

getNumFolds

setNumFolds

foldTipText

getFold

setFold

seedTipText

getSeed

setSeed

getCapabilities

setInputFormat

input

batchFinished

getRevision

main