Package 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:
Serializable, CapabilitiesHandler, CapabilitiesIgnorer, CommandlineRunnable, OptionHandler, RevisionHandler, WeightedAttributesHandler, WeightedInstancesHandler
public class NumericToNominal extends SimpleBatchFilter implements WeightedInstancesHandler, WeightedAttributesHandler
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 force 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: 14508 $
Author:
fracpete (fracpete at waikato dot ac dot nz)
See Also:

  • Constructor Details

    • NumericToNominal

      public NumericToNominal()

  • Method Details

    • globalInfo

      public 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 Enumeration<Option> listOptions()
      Gets an enumeration describing the available options.
      Specified by:
      listOptions in interface OptionHandler
      Overrides:
      listOptions in class Filter
      Returns:
      an enumeration of all the available options.

    • setOptions

      public void setOptions(String[] options) throws 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 Filter
      Parameters:
      options - the list of options as an array of strings
      Throws:
      Exception - if an option is not supported

    • getOptions

      public String[] getOptions()
      Gets the current settings of the filter.
      Specified by:
      getOptions in interface OptionHandler
      Overrides:
      getOptions in class Filter
      Returns:
      an array of strings suitable for passing to setOptions

    • invertSelectionTipText

      public 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 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 String getAttributeIndices()
      Gets the current range selection
      Returns:
      a string containing a comma separated list of ranges

    • setAttributeIndices

      public void setAttributeIndices(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:
      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:
      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:

    • getRevision

      public 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(String[] args)
      Runs the filter with the given parameters. Use -h to list options.
      Parameters:
      args - the commandline options