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java.lang.Object de.lmu.ifi.dbs.elki.utilities.scaling.outlier.OutlierMinusLogScaling
@Reference(authors="H.-P. Kriegel, P. Kr\u00f6ger, E. Schubert, A. Zimek", title="Interpreting and Unifying Outlier Scores", booktitle="Proc. 11th SIAM International Conference on Data Mining (SDM), Mesa, AZ, 2011", url="http://www.dbs.ifi.lmu.de/~zimek/publications/SDM2011/SDM11-outlier-preprint.pdf") public class OutlierMinusLogScaling
Scaling function to invert values by computing -1 * Math.log(x)
Useful for example for scaling
ABOD
, but see
MinusLogStandardDeviationScaling
and MinusLogGammaScaling
for
more advanced scalings for this algorithm.
Field Summary | |
---|---|
(package private) double |
max
Maximum value seen, set by prepare(de.lmu.ifi.dbs.elki.result.outlier.OutlierResult) |
(package private) double |
mlogmax
Maximum -log value seen, set by prepare(de.lmu.ifi.dbs.elki.result.outlier.OutlierResult) |
Constructor Summary | |
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OutlierMinusLogScaling()
Constructor, adhering to Parameterizable |
Method Summary | |
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double |
getMax()
Get maximum resulting value. |
double |
getMin()
Get minimum resulting value. |
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 java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
double max
prepare(de.lmu.ifi.dbs.elki.result.outlier.OutlierResult)
double mlogmax
prepare(de.lmu.ifi.dbs.elki.result.outlier.OutlierResult)
Constructor Detail |
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public OutlierMinusLogScaling()
Parameterizable
Method Detail |
---|
public double getScaled(double value)
ScalingFunction
getScaled
in interface ScalingFunction
value
- Original value
public double getMin()
ScalingFunction
Double.NaN
or
Double.NEGATIVE_INFINITY
.
getMin
in interface ScalingFunction
public double getMax()
ScalingFunction
Double.NaN
or
Double.POSITIVE_INFINITY
.
getMax
in interface ScalingFunction
public void prepare(OutlierResult or)
OutlierScalingFunction
prepare
in interface OutlierScalingFunction
or
- Outlier result to use
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