Package weka.filters.unsupervised.attribute

Class RandomSubset

  • All Implemented Interfaces:
    java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, StreamableFilter
    public class RandomSubset
extends SimpleStreamFilter
    Chooses a random subset of attributes, either an absolute number or a percentage. The class is always included in the output (as the last attribute).

    Valid options are: 

     -D
  Turns on output of debugging information.
     -N <double>
  The number of attributes to randomly select.
  If < 1 then percentage, >= 1 absolute number.
  (default: 0.5)
     -S <int>
  The seed value.
  (default: 1)
    Version:
    $Revision: 5547 $
    Author:
    fracpete (fracpete at waikato dot ac dot nz)
    See Also:
    Serialized Form

    • Constructor Detail

      • RandomSubset

        public RandomSubset()

    • 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()
        Returns 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.

      • 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

      • setOptions

        public void setOptions​(java.lang.String[] options)
                throws java.lang.Exception
        Parses a given list of options.

        Valid options are: 

         -D
  Turns on output of debugging information.
         -N <double>
  The number of attributes to randomly select.
  If < 1 then percentage, >= 1 absolute number.
  (default: 0.5)
         -S <int>
  The seed value.
  (default: 1)
        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()

      • numAttributesTipText

        public java.lang.String numAttributesTipText()
        Returns the tip text for this property.
        Returns:
        tip text for this property suitable for displaying in the explorer/experimenter gui

      • getNumAttributes

        public double getNumAttributes()
        Get the number of attributes (< 1 percentage, >= 1 absolute number).
        Returns:
        the number of attributes.

      • setNumAttributes

        public void setNumAttributes​(double value)
        Set the number of attributes.
        Parameters:
        value - the number of attributes to use.

      • seedTipText

        public java.lang.String seedTipText()
        Returns the tip text for this property.
        Returns:
        tip text for this property suitable for displaying in the explorer/experimenter gui

      • getSeed

        public int getSeed()
        Get the seed value for the random number generator.
        Returns:
        the seed value.

      • setSeed

        public void setSeed​(int value)
        Set the seed value for the random number generator.
        Parameters:
        value - the seed value.

      • 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