de.lmu.ifi.dbs.elki.index.tree.spatial.kd

Class SmallMemoryKDTree.KDTreeRangeQuery

java.lang.Object

de.lmu.ifi.dbs.elki.database.query.range.AbstractDistanceRangeQuery<O>

de.lmu.ifi.dbs.elki.index.tree.spatial.kd.SmallMemoryKDTree.KDTreeRangeQuery

All Implemented Interfaces:

DatabaseQuery, RangeQuery<O>

Enclosing class:

SmallMemoryKDTree<O extends NumberVector>

public class SmallMemoryKDTree.KDTreeRangeQuery
extends AbstractDistanceRangeQuery<O>

kNN query for the k-d-tree.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private Norm<? super O>	norm Norm to use.

Fields inherited from class de.lmu.ifi.dbs.elki.database.query.range.AbstractDistanceRangeQuery

distanceQuery, relation

Fields inherited from interface de.lmu.ifi.dbs.elki.database.query.DatabaseQuery

HINT_BULK, HINT_EXACT, HINT_HEAVY_USE, HINT_NO_CACHE, HINT_OPTIMIZED_ONLY, HINT_SINGLE

Constructor Summary

Constructors

Constructor and Description
KDTreeRangeQuery(DistanceQuery<O> distanceQuery, Norm<? super O> norm) Constructor.

Method Summary

Modifier and Type	Method and Description
void	getRangeForObject(O obj, double range, ModifiableDoubleDBIDList result) Get the neighbors for a particular object in a given query range
private void	kdRangeSearch(int left, int right, int axis, O query, ModifiableDoubleDBIDList res, DoubleDBIDListIter iter, double radius) Perform a kNN search on the kd-tree.

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.range.AbstractDistanceRangeQuery

getRangeForDBID, getRangeForDBID, getRangeForObject

Methods inherited from class java.lang.Object

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

Field Detail

norm

private Norm<? super O extends NumberVector> norm

Norm to use.

Constructor Detail

KDTreeRangeQuery

public KDTreeRangeQuery(DistanceQuery<O> distanceQuery,
                        Norm<? super O> norm)

Constructor.

Parameters:

distanceQuery - Distance query

norm - Norm to use

Method Detail

getRangeForObject

public void getRangeForObject(O obj,
                              double range,
                              ModifiableDoubleDBIDList result)

Description copied from interface: RangeQuery

Get the neighbors for a particular object in a given query range

Parameters:

obj - Query object

range - Query range

result - Neighbors output set

kdRangeSearch

private void kdRangeSearch(int left,
                           int right,
                           int axis,
                           O query,
                           ModifiableDoubleDBIDList res,
                           DoubleDBIDListIter iter,
                           double radius)

Perform a kNN search on the kd-tree.

Parameters:

left - Subtree begin

right - Subtree end (exclusive)

axis - Current splitting axis

query - Query object

res - kNN heap

iter - Iterator variable (reduces memory footprint!)

radius - Query radius