Package elki.outlier.anglebased

Class LBABOD<V extends NumberVector>

java.lang.Object

elki.outlier.anglebased.ABOD<V>

elki.outlier.anglebased.FastABOD<V>

elki.outlier.anglebased.LBABOD<V>

Type Parameters:

V - Vector type

All Implemented Interfaces:

Algorithm, OutlierAlgorithm

@Title("LB-ABOD: Lower Bounded Angle-Based Outlier Detection")
@Description("Outlier detection using variance analysis on angles, especially for high dimensional data sets.")
@Reference(authors="Hans-Peter Kriegel, Matthias Schubert, Arthur Zimek",
           title="Angle-Based Outlier Detection in High-dimensional Data",
           booktitle="Proc. 14th ACM SIGKDD Int. Conf. Knowledge Discovery and Data Mining (KDD\'08)",
           url="https://doi.org/10.1145/1401890.1401946",
           bibkey="DBLP:conf/kdd/KriegelSZ08")
@Alias("lb-abod")
public class LBABOD<V extends NumberVector>
extends FastABOD<V>

LB-ABOD (lower-bound) version of Angle-Based Outlier Detection / Angle-Based Outlier Factor.

Exact on the top k outliers, approximate on the remaining.

Outlier detection using variance analysis on angles, especially for high dimensional data sets.

Reference:

Hans-Peter Kriegel, Matthias Schubert, Arthur Zimek
Angle-Based Outlier Detection in High-dimensional Data
Proc. 14th ACM SIGKDD Int. Conf. Knowledge Discovery and Data Mining (KDD'08)

Since:

0.6.0

Author:

Matthias Schubert (Original Code), Erich Schubert (ELKIfication)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LBABOD.Par<V extends NumberVector>	Parameterization class.

Nested classes/interfaces inherited from interface elki.Algorithm

Algorithm.Utils

Field Summary

Fields

Modifier and Type	Field	Description
protected int	l	Number of outliers to refine.
private static Logging	LOG	The logger for this class.

Fields inherited from class elki.outlier.anglebased.FastABOD

k

Fields inherited from class elki.outlier.anglebased.ABOD

kernelFunction

Constructor Summary

Constructors

Constructor	Description
LBABOD(Similarity<? super V> kernelFunction, int k, int l)	Actual constructor, with parameters.

Method Summary

Modifier and Type	Method	Description
TypeInformation[]	getInputTypeRestriction()	Get the input type restriction used for negotiating the data query.
OutlierResult	run(Relation<V> relation)	Run LB-ABOD on the data set.

Methods inherited from class elki.outlier.anglebased.ABOD

computeABOF

Methods inherited from class java.lang.Object

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

Methods inherited from interface elki.outlier.OutlierAlgorithm

autorun

Field Detail

LOG

private static final Logging LOG

The logger for this class.

l

protected int l

Number of outliers to refine.

Constructor Detail

LBABOD

public LBABOD(Similarity<? super V> kernelFunction,
              int k,
              int l)

Actual constructor, with parameters. Fast mode (sampling).

Parameters:

kernelFunction - Kernel function to use

k - k parameter

l - Number of outliers to find exact

Method Detail

run

public OutlierResult run(Relation<V> relation)

Run LB-ABOD on the data set.

Overrides:

run in class FastABOD<V extends NumberVector>

Parameters:

relation - Relation to process

Returns:

Outlier detection result

getInputTypeRestriction

public TypeInformation[] getInputTypeRestriction()

Description copied from interface: Algorithm

Get the input type restriction used for negotiating the data query.

Specified by:

getInputTypeRestriction in interface Algorithm

Overrides:

getInputTypeRestriction in class FastABOD<V extends NumberVector>

Returns:

Type restriction