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## weka.filters.unsupervised.attribute
Class NumericToNominal

    java.lang.Object
      weka.filters.Filter
          weka.filters.SimpleFilter
              weka.filters.SimpleBatchFilter
                  weka.filters.unsupervised.attribute.NumericToNominal

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

    public class NumericToNominal

extends SimpleBatchFilter

A filter for turning numeric attributes into nominal ones. Unlike discretization, it just takes all numeric values and adds them to the list of nominal values of that attribute. Useful after CSV imports, to enforce certain attributes to become nominal, e.g., the class attribute, containing values from 1 to 5.

Valid options are:

     -R <col1,col2-col4,...>
      Specifies list of columns to Discretize. First and last are valid indexes.
      (default: first-last)

     -V
      Invert matching sense of column indexes.

Version:
  $Revision: 8576 $
Author:
  fracpete (fracpete at waikato dot ac dot nz)
See Also:
  Serialized Form

Constructor Summary
`NumericToNominal()`

Method Summary
`java.lang.String` | `attributeIndicesTipText()` Returns the tip text for this property
`java.lang.String` | `getAttributeIndices()` Gets the current range selection
`Capabilities` | `getCapabilities()` Returns the Capabilities of this filter.
`boolean` | `getInvertSelection()` Gets whether the supplied columns are to be worked on or the others.
`java.lang.String[]` | `getOptions()` Gets the current settings of the filter.
`java.lang.String` | `getRevision()` Returns the revision string.
`java.lang.String` | `globalInfo()` Returns a string describing this filter
`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[] args)` Runs the filter with the given parameters.
`void` | `setAttributeIndices(java.lang.String value)` Sets which attributes are to be "nominalized" (only numeric attributes among the selection will be transformed).
`void` | `setAttributeIndicesArray(int[] value)` Sets which attributes are to be transoformed to nominal.
`void` | `setInvertSelection(boolean value)` Sets whether selected columns should be worked on or all the others apart from these.
`void` | `setOptions(java.lang.String[] options)` Parses a given list of options.

Methods inherited from class weka.filters.SimpleBatchFilter
`batchFinished, input`

Methods inherited from class weka.filters.SimpleFilter
`debugTipText, getDebug, setDebug, setInputFormat`

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

### NumericToNominal

    public NumericToNominal()

Method Detail

### globalInfo

    public java.lang.String globalInfo()

  Returns a string describing this filter

  Specified by:
    `globalInfo` in class `SimpleFilter`
  Returns:
    a description of the filter suitable for displaying in the explorer/experimenter gui

### listOptions

    public java.util.Enumeration listOptions()

  Gets an enumeration describing the available options.

  Specified by:
    `listOptions` in interface `OptionHandler`
  Overrides:
    `listOptions` in class `SimpleFilter`
  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:

       -R <col1,col2-col4,...>
        Specifies list of columns to Discretize. First and last are valid indexes.
        (default: first-last)

       -V
        Invert matching sense of column indexes.

  Specified by:
    `setOptions` in interface `OptionHandler`
  Overrides:
    `setOptions` in class `SimpleFilter`
  Parameters:
    `options` - the list of options as an array of strings
  Throws:
    `java.lang.Exception` - if an option is not supported
  See Also:
    `SimpleFilter.reset()`

### getOptions

    public java.lang.String[] getOptions()

  Gets the current settings of the filter.

  Specified by:
    `getOptions` in interface `OptionHandler`
  Overrides:
    `getOptions` in class `SimpleFilter`
  Returns:
    an array of strings suitable for passing to setOptions

### 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 whether the supplied columns are to be worked on or the others.

  Returns:
    true if the supplied columns will be worked on

### setInvertSelection

    public void setInvertSelection(boolean value)

  Sets whether selected columns should be worked on or all the others apart from these. If true all the other columns are considered for "nominalization".

  Parameters:
    `value` - the new invert setting

### attributeIndicesTipText

    public java.lang.String attributeIndicesTipText()

  Returns the tip text for this property

  Returns:
    tip text for this property suitable for displaying in the explorer/experimenter gui

### getAttributeIndices

    public java.lang.String getAttributeIndices()

  Gets the current range selection

  Returns:
    a string containing a comma separated list of ranges

### setAttributeIndices

    public void setAttributeIndices(java.lang.String value)

  Sets which attributes are to be "nominalized" (only numeric attributes among the selection will be transformed).

  Parameters:
    `value` - a string representing the list of attributes. Since the string will typically come from a user, attributes are indexed from 1.
    eg: first-3,5,6-last
  Throws:
    `java.lang.IllegalArgumentException` - if an invalid range list is supplied

### setAttributeIndicesArray

    public void setAttributeIndicesArray(int[] value)

  Sets which attributes are to be transoformed to nominal. (only numeric attributes among the selection will be transformed).

  Parameters:
    `value` - an array containing indexes of attributes to nominalize. Since the array will typically come from a program, attributes are indexed from 0.
  Throws:
    `java.lang.IllegalArgumentException` - if an invalid set of ranges is supplied

### 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`

### 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[] args)

  Runs the filter with the given parameters. Use -h to list options.

  Parameters:
    `args` - the commandline options

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