de.lmu.ifi.dbs.elki.utilities.scaling.outlier

Class OutlierSqrtScaling

java.lang.Object

de.lmu.ifi.dbs.elki.utilities.scaling.outlier.OutlierSqrtScaling

All Implemented Interfaces:

Parameterizable, OutlierScalingFunction, ScalingFunction

public class OutlierSqrtScaling
extends Object
implements OutlierScalingFunction

Scaling that can map arbitrary positive values to a value in the range of [0:1]. Transformation is done by taking the square root, then doing a linear linear mapping onto 0:1 using the minimum values seen.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OutlierSqrtScaling.Parameterizer Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
protected double	factor Scaling factor
protected Double	max Field storing the Maximum value
static OptionID	MAX_ID Parameter to specify the fixed maximum to use.
protected Double	min Field storing the minimum value
static OptionID	MIN_ID Parameter to specify the fixed minimum to use.

Constructor Summary

Constructors

Constructor and Description
OutlierSqrtScaling(Double min, Double max) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
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

MIN_ID

public static final OptionID MIN_ID

Parameter to specify the fixed minimum to use.

Key: -sqrtscale.min

MAX_ID

public static final OptionID MAX_ID

Parameter to specify the fixed maximum to use.

Key: -sqrtscale.max

min

protected Double min

Field storing the minimum value

max

protected Double max

Field storing the Maximum value

factor

protected double factor

Scaling factor

Constructor Detail

OutlierSqrtScaling

public OutlierSqrtScaling(Double min,
                  Double max)

Constructor.

Parameters:

min -

max -

Method Detail

getScaled

public double getScaled(double value)

Description copied from interface: ScalingFunction

Transform a given value using the scaling function.

Specified by:

getScaled in interface ScalingFunction

Parameters:

value - Original value

Returns:

Scaled value

prepare

public void prepare(OutlierResult or)

Description copied from interface: OutlierScalingFunction

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 Database, Result or Annotation.

Specified by:

prepare in interface OutlierScalingFunction

Parameters:

or - Outlier result to use

getMin

public double getMin()

Description copied from interface: ScalingFunction

Get minimum resulting value. May be Double.NaN or Double.NEGATIVE_INFINITY.

Specified by:

getMin in interface ScalingFunction

Returns:

Minimum resulting value.

getMax

public double getMax()

Description copied from interface: ScalingFunction

Get maximum resulting value. May be Double.NaN or Double.POSITIVE_INFINITY.

Specified by:

getMax in interface ScalingFunction

Returns:

Maximum resulting value.