weka.filters.unsupervised.attribute
Class NumericToBinary

java.lang.Object
  |
  +--weka.filters.Filter
        |
        +--weka.filters.unsupervised.attribute.PotentialClassIgnorer
              |
              +--weka.filters.unsupervised.attribute.NumericToBinary

All Implemented Interfaces:

java.io.Serializable, StreamableFilter, UnsupervisedFilter

public class NumericToBinary

extends PotentialClassIgnorer

implements UnsupervisedFilter, StreamableFilter

Converts all numeric attributes into binary attributes (apart from the class attribute): if the value of the numeric attribute is exactly zero, the value of the new attribute will be zero. If the value of the numeric attribute is missing, the value of the new attribute will be missing. Otherwise, the value of the new attribute will be one. The new attributes will nominal.

Version:

$Revision: 1.3 $

Author:

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

See Also:

Serialized Form

Constructor Summary

NumericToBinary()

Method Summary

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, batchFinished, filterFile, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputPeek, useFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericToBinary

public NumericToBinary()

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.

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 defined.

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