weka.filters.unsupervised.attribute
Class Normalize

java.lang.Object
  weka.filters.Filter
      weka.filters.unsupervised.attribute.PotentialClassIgnorer
          weka.filters.unsupervised.attribute.Normalize

All Implemented Interfaces:

java.io.Serializable, UnsupervisedFilter

public class Normalize

extends PotentialClassIgnorer

implements UnsupervisedFilter

Normalizes all numeric values in the given dataset. The resulting values are in [0,1] for the data used to compute the normalization intervals.

Version:

$Revision: 1.4 $

Author:

Eibe Frank (eibe@cs.waikato.ac.nz)

See Also:

Serialized Form

Field Summary

private double[]	m_MaxArray The maximum values for numeric attributes.
private double[]	m_MinArray The minimum values for numeric attributes.

Fields inherited from class weka.filters.unsupervised.attribute.PotentialClassIgnorer

m_ClassIndex, m_IgnoreClass

Fields inherited from class weka.filters.Filter

m_NewBatch

Constructor Summary

Normalize()

Method Summary

boolean	batchFinished() Signify that this batch of input to the filter is finished.
private void	convertInstance(Instance instance) Convert a single instance over.
java.lang.String	globalInfo() Returns a string describing this filter
boolean	input(Instance instance) Input an instance for filtering.
static void	main(java.lang.String[] argv) Main method for testing this class.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.

Methods inherited from class weka.filters.unsupervised.attribute.PotentialClassIgnorer

getOutputFormat, setIgnoreClass

Methods inherited from class weka.filters.Filter

batchFilterFile, bufferInput, copyStringValues, copyStringValues, filterFile, flushInput, getInputFormat, getInputStringIndex, getOutputStringIndex, getStringIndices, inputFormat, inputFormatPeek, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputFormatPeek, outputPeek, push, resetQueue, setOutputFormat, useFilter

Methods inherited from class java.lang.Object

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

Field Detail

m_MinArray

private double[] m_MinArray

The minimum values for numeric attributes.

m_MaxArray

private double[] m_MaxArray

The maximum values for numeric attributes.

Constructor Detail

Normalize

public Normalize()

Method Detail

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

setInputFormat

public boolean setInputFormat(Instances instanceInfo)
                       throws java.lang.Exception

Sets the format of the input instances.

Overrides:

setInputFormat in class PotentialClassIgnorer

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 format has been set.

batchFinished

public boolean batchFinished()

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

convertInstance

private void convertInstance(Instance instance)

Convert a single instance over. The converted instance is added to the end of the output queue.

Parameters:

instance - the instance to convert

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