# Package weka.core.neighboursearch

- Class Summary
  Class | Description
  --- | ---
  BallTree | Class implementing the BallTree/Metric Tree algorithm for nearest neighbour search. The connection to dataset is only a reference.
  CoverTree | Class implementing the CoverTree datastructure. The class is very much a translation of the c source code made available by the authors. For more information and original source code see: Alina Beygelzimer, Sham Kakade, John Langford: Cover trees for nearest neighbor.
  FilteredNeighbourSearch | Applies the given filter before calling the given neighbour search method.
  KDTree | Class implementing the KDTree search algorithm for nearest neighbour search. The connection to dataset is only a reference.
  LinearNNSearch | Class implementing the brute force search algorithm for nearest neighbour search.
  NearestNeighbourSearch | Abstract class for nearest neighbour search.
  PerformanceStats | The class that measures the performance of a nearest neighbour search (NNS) algorithm.
  TreePerformanceStats | The class that measures the performance of a tree based nearest neighbour search algorithm.