Package weka.core.neighboursearch

Class PLSNNSearch

  • All Implemented Interfaces:
    Serializable, weka.core.AdditionalMeasureProducer, weka.core.OptionHandler, weka.core.RevisionHandler
    public class PLSNNSearch
extends TransformNNSearch
    Class implementing the brute force search algorithm for nearest neighbour search, filtered using PLS.

    Valid options are: 

     -S
  Skip identical instances (distances equal to zero).
    Version:
    $Revision$
    Author:
    Dale
    See Also:
    Serialized Form

    • Field Detail

      • m_plsfilter

        protected weka.filters.supervised.attribute.PLSFilter m_plsfilter
        The neighbourhood of instances to find neighbours in.

      • mNumComponents

        protected int mNumComponents

      • m_Preprocessing

        protected int m_Preprocessing
        the type of preprocessing

    • Constructor Detail

      • PLSNNSearch

        public PLSNNSearch()
        Constructor. Needs setInstances(Instances) to be called before the class is usable.

      • PLSNNSearch

        public PLSNNSearch​(weka.core.Instances insts)
        Constructor that uses the supplied set of instances.
        Parameters:
        insts - the instances to use

    • Method Detail

      • setNumComponents

        public void setNumComponents​(int nc)

      • getNumComponents

        public int getNumComponents()

      • transformInstances

        protected weka.core.Instances transformInstances​(weka.core.Instances in)
                                          throws Exception
        Throws:
        Exception

      • buildFilter

        protected weka.filters.supervised.attribute.PLSFilter buildFilter​(int numcomponents)

      • kNearestNeighbours

        public weka.core.Instances kNearestNeighbours​(weka.core.Instance target,
                                              int kNN)
                                       throws Exception
        Returns k nearest instances in the current neighbourhood to the supplied instance.
        Overrides:
        kNearestNeighbours in class NewNNSearch
        Parameters:
        target - The instance to find the k nearest neighbours for.
        kNN - The number of nearest neighbours to find.
        Returns:
        the k nearest neighbors
        Throws:
        Exception - if the neighbours could not be found.

      • setInstances

        public void setInstances​(weka.core.Instances insts)
                  throws Exception
        Sets the instances comprising the current neighbourhood.
        Overrides:
        setInstances in class NewNNSearch
        Parameters:
        insts - The set of instances on which the nearest neighbour search is carried out. Usually this set is the training set.
        Throws:
        Exception - if setting of instances fails

      • update

        public void update​(weka.core.Instance ins)
            throws Exception
        Updates the LinearNNSearch to cater for the new added instance. This implementation only updates the ranges of the DistanceFunction class, since our set of instances is passed by reference and should already have the newly added instance.
        Overrides:
        update in class NewNNSearch
        Parameters:
        ins - The instance to add. Usually this is the instance that is added to our neighbourhood i.e. the training instances.
        Throws:
        Exception - if the given instances are null

      • addInstanceInfo

        public void addInstanceInfo​(weka.core.Instance ins)
        Adds the given instance info. This implementation updates the range datastructures of the DistanceFunction class.
        Overrides:
        addInstanceInfo in class NewNNSearch
        Parameters:
        ins - The instance to add the information of. Usually this is the test instance supplied to update the range of attributes in the distance function.

      • listOptions

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

      • setPreprocessing

        public void setPreprocessing​(weka.core.SelectedTag value)
        Sets the type of preprocessing to use
        Parameters:
        value - the preprocessing type

      • setOptions

        public void setOptions​(String[] options)
                throws Exception
        Description copied from class: NewNNSearch
        Parses a given list of options.

        Valid options are: 

         -S
  Skip identical instances (distances equal to zero).
        Specified by:
        setOptions in interface weka.core.OptionHandler
        Overrides:
        setOptions in class NewNNSearch
        Parameters:
        options - the list of options as an array of strings
        Throws:
        Exception - if an option is not supported

      • getPreprocessing

        public weka.core.SelectedTag getPreprocessing()
        Gets the type of preprocessing to use
        Returns:
        the current preprocessing type.

      • getOptions

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