Package elki.application.cache

Class CacheDoubleDistanceKNNLists<O>

  • Type Parameters:
    O - Object type
    public class CacheDoubleDistanceKNNLists<O>
extends elki.application.AbstractApplication
    Precompute the k nearest neighbors in a disk cache.
    Since:
    0.6.0
    Author:
    Erich Schubert

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private elki.database.Database database
      Data source to process.
      private elki.distance.Distance<? super O> distance
      Distance function that is to be cached.
      private int k
      Number of neighbors to precompute.
      static int KNN_CACHE_MAGIC
      Magic number to identify files.
      private static elki.logging.Logging LOG
      The logger for this class.
      private java.nio.file.Path out
      Output file.

      • Fields inherited from class elki.application.AbstractApplication

        REFERENCE, VERSION

    • Constructor Summary

      Constructors 
      Constructor Description
      CacheDoubleDistanceKNNLists​(elki.database.Database database, elki.distance.Distance<? super O> distance, int k, java.nio.file.Path out)
      Constructor.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static void main​(java.lang.String[] args)
      Main method, delegate to super class.
      void run()  

      • Methods inherited from class elki.application.AbstractApplication

        printErrorMessage, runCLIApplication, usage

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • LOG

        private static final elki.logging.Logging LOG
        The logger for this class.

      • database

        private elki.database.Database database
        Data source to process.

      • distance

        private elki.distance.Distance<? super O> distance
        Distance function that is to be cached.

      • k

        private int k
        Number of neighbors to precompute.

      • out

        private java.nio.file.Path out
        Output file.

      • KNN_CACHE_MAGIC

        public static final int KNN_CACHE_MAGIC
        Magic number to identify files.

        Note, when cloning this class, and performing any incompatible change to the file format, you should also change this magic ID!

        See Also:
        Constant Field Values

    • Constructor Detail

      • CacheDoubleDistanceKNNLists

        public CacheDoubleDistanceKNNLists​(elki.database.Database database,
                                   elki.distance.Distance<? super O> distance,
                                   int k,
                                   java.nio.file.Path out)
        Constructor.
        Parameters:
        database - Data source
        distance - Distance function
        k - Number of nearest neighbors
        out - Matrix output file

    • Method Detail

      • run

        public void run()
        Specified by:
        run in class elki.application.AbstractApplication

      • main

        public static void main​(java.lang.String[] args)
        Main method, delegate to super class.
        Parameters:
        args - Command line arguments