Package elki.utilities.scaling.outlier
Class MinusLogStandardDeviationScaling
- java.lang.Object
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- elki.utilities.scaling.outlier.StandardDeviationScaling
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- elki.utilities.scaling.outlier.MinusLogStandardDeviationScaling
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- All Implemented Interfaces:
OutlierScaling
,ScalingFunction
@Reference(authors="Hans-Peter Kriegel, Peer Kr\u00f6ger, Erich Schubert, Arthur Zimek", title="Interpreting and Unifying Outlier Scores", booktitle="Proc. 11th SIAM International Conference on Data Mining (SDM 2011)", url="https://doi.org/10.1137/1.9781611972818.2", bibkey="DBLP:conf/sdm/KriegelKSZ11") public class MinusLogStandardDeviationScaling extends StandardDeviationScaling
Scaling that can map arbitrary values to a probability in the range of [0:1].Transformation is done using the formula \(\max\{0, \mathrm{erf}(\lambda \frac{x-\mu}{\sigma\sqrt{2}})\}\)
Where mean can be fixed to a given value, and stddev is then computed against this mean.
Reference:
Hans-Peter Kriegel, Peer Kröger, Erich Schubert, Arthur Zimek
Interpreting and Unifying Outlier Scores
Proc. 11th SIAM International Conference on Data Mining (SDM 2011)- Since:
- 0.3
- Author:
- Erich Schubert
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
MinusLogStandardDeviationScaling.Par
Parameterization class.
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Field Summary
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Fields inherited from class elki.utilities.scaling.outlier.StandardDeviationScaling
factor, fixedmean, lambda, mean
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Constructor Summary
Constructors Constructor Description MinusLogStandardDeviationScaling(double fixedmean, double lambda)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description double
getScaled(double value)
Transform a given value using the scaling function.void
prepare(OutlierResult or)
Prepare is called once for each data set, before getScaled() will be called.-
Methods inherited from class elki.utilities.scaling.outlier.StandardDeviationScaling
getMax, getMin, prepare
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Method Detail
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getScaled
public double getScaled(double value)
Description copied from interface:ScalingFunction
Transform a given value using the scaling function.- Specified by:
getScaled
in interfaceScalingFunction
- Overrides:
getScaled
in classStandardDeviationScaling
- Parameters:
value
- Original value- Returns:
- Scaled value
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prepare
public void prepare(OutlierResult or)
Description copied from interface:OutlierScaling
Prepare is called once for each data set, before getScaled() will be called. This function can be used to extract global parameters such as means, minimums or maximums from the outlier scores.- Specified by:
prepare
in interfaceOutlierScaling
- Overrides:
prepare
in classStandardDeviationScaling
- Parameters:
or
- Outlier result to use
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