Package elki.outlier.spatial
Class CTLuZTestOutlier<N>
- java.lang.Object
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- elki.outlier.spatial.AbstractNeighborhoodOutlier<N>
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- elki.outlier.spatial.CTLuZTestOutlier<N>
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- Type Parameters:
N
- Neighborhood type
- All Implemented Interfaces:
Algorithm
,OutlierAlgorithm
@Title("Z-Test Outlier Detection") @Description("Outliers are detected by their z-deviation from the local mean.") @Reference(authors="S. Shekhar, C.-T. Lu, P. Zhang", title="A Unified Approach to Detecting Spatial Outliers", booktitle="GeoInformatica 7-2, 2003", url="https://doi.org/10.1023/A:1023455925009", bibkey="DBLP:journals/geoinformatica/ShekharLZ03") public class CTLuZTestOutlier<N> extends AbstractNeighborhoodOutlier<N>
Detect outliers by comparing their attribute value to the mean and standard deviation of their neighborhood.Reference:
S. Shekhar, C.-T. Lu, P. Zhang
A Unified Approach to Detecting Spatial Outliers
GeoInformatica 7-2, 2003Description:
Z-Test Algorithm uses mean to represent the average non-spatial attribute value of neighbors.
The Difference e = non-spatial-attribute-value - mean (Neighborhood) is computed.
The Spatial Objects with the highest standardized e value are Spatial Outliers.- Since:
- 0.4.0
- Author:
- Ahmed Hettab
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Nested Class Summary
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Nested classes/interfaces inherited from interface elki.Algorithm
Algorithm.Utils
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Field Summary
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Fields inherited from class elki.outlier.spatial.AbstractNeighborhoodOutlier
NEIGHBORHOOD_ID
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Constructor Summary
Constructors Constructor Description CTLuZTestOutlier(NeighborSetPredicate.Factory<N> npredf)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TypeInformation[]
getInputTypeRestriction()
Get the input type restriction used for negotiating the data query.OutlierResult
run(Database database, Relation<N> nrel, Relation<? extends NumberVector> relation)
Main method.-
Methods inherited from class elki.outlier.spatial.AbstractNeighborhoodOutlier
getNeighborSetPredicateFactory
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface elki.outlier.OutlierAlgorithm
autorun
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Constructor Detail
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CTLuZTestOutlier
public CTLuZTestOutlier(NeighborSetPredicate.Factory<N> npredf)
Constructor.- Parameters:
npredf
- Neighbor predicate
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Method Detail
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getInputTypeRestriction
public TypeInformation[] getInputTypeRestriction()
Description copied from interface:Algorithm
Get the input type restriction used for negotiating the data query.- Returns:
- Type restriction
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run
public OutlierResult run(Database database, Relation<N> nrel, Relation<? extends NumberVector> relation)
Main method.- Parameters:
database
- Databasenrel
- Neighborhood relationrelation
- Data relation (1d!)- Returns:
- Outlier detection result
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