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## 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

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