Package weka.filters.unsupervised.attribute

Class BestBySLR

  • All Implemented Interfaces:
    Serializable, weka.core.CapabilitiesHandler, weka.core.CapabilitiesIgnorer, weka.core.CommandlineRunnable, weka.core.OptionHandler, weka.core.RevisionHandler
    public class BestBySLR
extends weka.filters.SimpleBatchFilter
    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  select.
    Version:
    $Revision: 1.2 $
    Author:
    dale (dale at waikato dot ac dot nz)
    See Also:
    Serialized Form

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected int m_NumAttributes
      The number of attributes to choose.

      • Fields inherited from class weka.filters.Filter

        m_Debug, m_DoNotCheckCapabilities, m_FirstBatchDone, m_InputRelAtts, m_InputStringAtts, m_NewBatch, m_OutputRelAtts, m_OutputStringAtts

    • Constructor Summary

      Constructors 
      Constructor Description
      BestBySLR()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean allowAccessToFullInputFormat()  
      protected weka.core.Instances determineOutputFormat​(weka.core.Instances inputFormat)
      Determines the output format based on the input format and returns this.
      weka.core.Capabilities getCapabilities()
      Returns the Capabilities of this filter.
      int getNumAttributes()
      Get the number of attributes (< 1 percentage, >= 1 absolute number).
      String[] getOptions()
      Gets the current settings of the filter.
      String getRevision()
      Returns the revision string.
      protected int[] getSortedAttributeArray​(weka.core.Instances insts)
      Return array of attributes in sorted order
      String globalInfo()
      Returns a string describing this filter.
      Enumeration listOptions()
      Returns an enumeration describing the available options.
      static void main​(String[] args)
      Runs the filter with the given parameters.
      String numAttributesTipText()
      Returns the tip text for this property.
      protected weka.core.Instances process​(weka.core.Instances instances)  
      void setNumAttributes​(int value)
      Set the number of attributes.
      void setOptions​(String[] options)
      Parses a given list of options.

      • Methods inherited from class weka.filters.SimpleBatchFilter

        batchFinished, hasImmediateOutputFormat, input

      • Methods inherited from class weka.filters.SimpleFilter

        reset, setInputFormat

      • Methods inherited from class weka.filters.Filter

        batchFilterFile, bufferInput, copyValues, copyValues, debugTipText, doNotCheckCapabilitiesTipText, filterFile, flushInput, getCapabilities, getDebug, getDoNotCheckCapabilities, getInputFormat, getOutputFormat, initInputLocators, initOutputLocators, inputFormatPeek, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, mayRemoveInstanceAfterFirstBatchDone, numPendingOutput, output, outputFormatPeek, outputPeek, postExecution, preExecution, push, push, resetQueue, run, runFilter, setDebug, setDoNotCheckCapabilities, setOutputFormat, testInputFormat, toString, useFilter, wekaStaticWrapper

    • Field Detail

      • m_NumAttributes

        protected int m_NumAttributes
        The number of attributes to choose.

    • Constructor Detail

      • BestBySLR

        public BestBySLR()

    • Method Detail

      • globalInfo

        public String globalInfo()
        Returns a string describing this filter.
        Specified by:
        globalInfo in class weka.filters.SimpleFilter
        Returns:
        a description of the filter suitable for displaying in the explorer/experimenter gui

      • listOptions

        public Enumeration listOptions()
        Returns an enumeration describing the available options.
        Specified by:
        listOptions in interface weka.core.OptionHandler
        Overrides:
        listOptions in class weka.filters.Filter
        Returns:
        an enumeration of all the available options.

      • getOptions

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

      • setOptions

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

        Valid options are: 

         -D
  Turns on output of debugging information.
         -N <int>
  The number of attributes to select.
        Specified by:
        setOptions in interface weka.core.OptionHandler
        Overrides:
        setOptions in class weka.filters.Filter
        Parameters:
        options - the list of options as an array of strings
        Throws:
        Exception - if an option is not supported

      • numAttributesTipText

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

      • setNumAttributes

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

      • getCapabilities

        public weka.core.Capabilities getCapabilities()
        Returns the Capabilities of this filter.
        Specified by:
        getCapabilities in interface weka.core.CapabilitiesHandler
        Overrides:
        getCapabilities in class weka.filters.Filter
        Returns:
        the capabilities of this object
        See Also:
        Capabilities

      • getSortedAttributeArray

        protected int[] getSortedAttributeArray​(weka.core.Instances insts)
        Return array of attributes in sorted order
        Parameters:
        insts - instances
        Returns:
        sorted attribute array

      • allowAccessToFullInputFormat

        public boolean allowAccessToFullInputFormat()
        Overrides:
        allowAccessToFullInputFormat in class weka.filters.SimpleBatchFilter

      • determineOutputFormat

        protected weka.core.Instances determineOutputFormat​(weka.core.Instances inputFormat)
                                             throws Exception
        Determines the output format based on the input format and returns this. In case the output format cannot be returned immediately, i.e., hasImmediateOutputFormat() returns false, then this method will called from batchFinished() after the call of preprocess(Instances), in which, e.g., statistics for the actual processing step can be gathered.
        Specified by:
        determineOutputFormat in class weka.filters.SimpleFilter
        Parameters:
        inputFormat - the input format to base the output format on
        Returns:
        the output format
        Throws:
        Exception - in case the determination goes wrong

      • process

        protected weka.core.Instances process​(weka.core.Instances instances)
                               throws Exception
        Specified by:
        process in class weka.filters.SimpleFilter
        Throws:
        Exception

      • getRevision

        public String getRevision()
        Returns the revision string.
        Specified by:
        getRevision in interface weka.core.RevisionHandler
        Overrides:
        getRevision in class weka.filters.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