de.lmu.ifi.dbs.elki.index.vafile

Class DAFile

java.lang.Object

de.lmu.ifi.dbs.elki.index.vafile.DAFile

@Reference(authors="Hans-Peter Kriegel, Peer Kr\u00f6ger, Matthias Schubert, Ziyue Zhu",
           title="Efficient Query Processing in Arbitrary Subspaces Using Vector Approximations",
           booktitle="Proc. 18th Int. Conf. on Scientific and Statistical Database Management (SSDBM 06)",
           url="https://doi.org/10.1109/SSDBM.2006.23",
           bibkey="DBLP:conf/ssdbm/KriegelKSZ06")
public class DAFile
extends java.lang.Object

Dimension approximation file, a one-dimensional part of the PartialVAFile.

Reference:

Hans-Peter Kriegel, Peer Kröger, Matthias Schubert, Ziyue Zhu
Efficient Query Processing in Arbitrary Subspaces Using Vector Approximations
Proc. 18th Int. Conf. on Scientific and Statistical Database Management (SSDBM 06)

Since:

0.5.0

Author:

Thomas Bernecker, Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private int	dimension Dimension of this approximation file.
private double[]	splitPositions Splitting grid.

Constructor Summary

Constructors

Constructor and Description
DAFile(Relation<? extends NumberVector> relation, int dimension, int partitions) Constructor.

Method Summary

Modifier and Type	Method and Description
int	getDimension() Return the dimension we indexed.
int	getIOCosts() Estimate the IO costs for this index.
double[]	getSplitPositions() Return the split positions.

Methods inherited from class java.lang.Object

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

Field Detail

dimension

private final int dimension

Dimension of this approximation file.

splitPositions

private final double[] splitPositions

Splitting grid.

Constructor Detail

DAFile

public DAFile(Relation<? extends NumberVector> relation,
              int dimension,
              int partitions)

Constructor.

Parameters:

relation - Relation to index

dimension - Dimension of this file

partitions - Number of partitions

Method Detail

getSplitPositions

public double[] getSplitPositions()

Return the split positions.

Returns:

the split positions

getDimension

public int getDimension()

Return the dimension we indexed.

Returns:

the dimension

getIOCosts

public int getIOCosts()

Estimate the IO costs for this index.

Returns:

IO costs