de.lmu.ifi.dbs.elki.algorithm.outlier

Class LBABOD<V extends NumberVector<?>>

java.lang.Object

de.lmu.ifi.dbs.elki.algorithm.AbstractAlgorithm<OutlierResult>

de.lmu.ifi.dbs.elki.algorithm.outlier.ABOD<V>

de.lmu.ifi.dbs.elki.algorithm.outlier.FastABOD<V>

de.lmu.ifi.dbs.elki.algorithm.outlier.LBABOD<V>

Type Parameters:

V - Vector type

All Implemented Interfaces:

Algorithm, OutlierAlgorithm, Parameterizable

@Title(value="LB-ABOD: Lower Bounded Angle-Based Outlier Detection")
@Description(value="Outlier detection using variance analysis on angles, especially for high dimensional data sets.")
@Reference(authors="H.-P. Kriegel, M. Schubert, and A. Zimek",
           title="Angle-Based Outlier Detection in High-dimensional Data",
           booktitle="Proc. 14th ACM SIGKDD Int. Conf. on Knowledge Discovery and Data Mining (KDD \'08), Las Vegas, NV, 2008",
           url="http://dx.doi.org/10.1145/1401890.1401946")
public class LBABOD<V extends NumberVector<?>>
extends FastABOD<V>

Angle-Based Outlier Detection / Angle-Based Outlier Factor. LB-ABOD (lower-bound) version. Exact on the top k outliers, approximate on the remaining. Outlier detection using variance analysis on angles, especially for high dimensional data sets. H.-P. Kriegel, M. Schubert, and A. Zimek: Angle-Based Outlier Detection in High-dimensional Data. In: Proc. 14th ACM SIGKDD Int. Conf. on Knowledge Discovery and Data Mining (KDD '08), Las Vegas, NV, 2008.

Nested Class Summary

Nested Classes

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

Field Summary

Fields

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

Fields inherited from class de.lmu.ifi.dbs.elki.algorithm.outlier.FastABOD

k

Fields inherited from class de.lmu.ifi.dbs.elki.algorithm.outlier.ABOD

kernelFunction

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
TypeInformation[]	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.
protected Logging	getLogger() Get the (STATIC) logger for this class.
OutlierResult	run(Database db, Relation<V> relation) Run LB-ABOD on the data set.

Methods inherited from class de.lmu.ifi.dbs.elki.algorithm.outlier.ABOD

computeABOF

Methods inherited from class de.lmu.ifi.dbs.elki.algorithm.AbstractAlgorithm

makeParameterDistanceFunction, run

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.algorithm.outlier.OutlierAlgorithm

run

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(SimilarityFunction<? super V,DoubleDistance> 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(Database db,
                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 class: AbstractAlgorithm

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

getLogger

protected Logging getLogger()

Description copied from class: AbstractAlgorithm

Get the (STATIC) logger for this class.

Overrides:

getLogger in class FastABOD<V extends NumberVector<?>>

Returns:

the static logger