Class 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: 10988 $
    Author:
    fracpete (fracpete at waikato dot ac dot nz)
    See Also:
    Serialized Form
    • 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
      • 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