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package de.lmu.ifi.dbs.elki.result.outlier;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2013
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.logging.Logging;
/**
* Basic outlier score. Straightforward implementation of the
* {@link OutlierScoreMeta} interface.
*
* @author Erich Schubert
*/
public class BasicOutlierScoreMeta implements OutlierScoreMeta {
/**
* Store the actual minimum
*/
double actualMinimum = Double.NaN;
/**
* Store the actual maximum
*/
double actualMaximum = Double.NaN;
/**
* Store the theoretical minimum
*/
double theoreticalMinimum = Double.NaN;
/**
* Store the theoretical maximum
*/
double theoreticalMaximum = Double.NaN;
/**
* Store the theoretical baseline
*/
double theoreticalBaseline = Double.NaN;
/**
* Constructor with actual values only.
*
* @param actualMinimum actual minimum
* @param actualMaximum actual maximum
*/
public BasicOutlierScoreMeta(double actualMinimum, double actualMaximum) {
this(actualMinimum, actualMaximum, Double.NaN, Double.NaN, Double.NaN);
}
/**
* Constructor with all range values
*
* @param actualMinimum actual minimum
* @param actualMaximum actual maximum
* @param theoreticalMinimum theoretical minimum
* @param theoreticalMaximum theoretical maximum
*/
public BasicOutlierScoreMeta(double actualMinimum, double actualMaximum, double theoreticalMinimum, double theoreticalMaximum) {
this(actualMinimum, actualMaximum, theoreticalMinimum, theoreticalMaximum, Double.NaN);
}
/**
* Full constructor - all values.
*
* @param actualMinimum actual minimum
* @param actualMaximum actual maximum
* @param theoreticalMinimum theoretical minimum
* @param theoreticalMaximum theoretical maximum
* @param theoreticalBaseline theoretical baseline
*/
public BasicOutlierScoreMeta(double actualMinimum, double actualMaximum, double theoreticalMinimum, double theoreticalMaximum, double theoreticalBaseline) {
super();
if(Double.isNaN(actualMinimum) || Double.isNaN(actualMaximum)) {
Logging.getLogger(this.getClass()).warning("Warning: Outlier Score meta initalized with NaN values: " + actualMinimum + " - " + actualMaximum);
}
this.actualMinimum = actualMinimum;
this.actualMaximum = actualMaximum;
this.theoreticalMinimum = theoreticalMinimum;
this.theoreticalMaximum = theoreticalMaximum;
this.theoreticalBaseline = theoreticalBaseline;
}
@Override
public double getActualMaximum() {
return actualMaximum;
}
@Override
public double getActualMinimum() {
return actualMinimum;
}
@Override
public double getTheoreticalBaseline() {
return theoreticalBaseline;
}
@Override
public double getTheoreticalMaximum() {
return theoreticalMaximum;
}
@Override
public double getTheoreticalMinimum() {
return theoreticalMinimum;
}
@Override
public double normalizeScore(double value) {
double center = 0.0;
if(!Double.isNaN(theoreticalBaseline) && !Double.isInfinite(theoreticalBaseline)) {
center = theoreticalBaseline;
}
else if(!Double.isNaN(theoreticalMinimum) && !Double.isInfinite(theoreticalMinimum)) {
center = theoreticalMinimum;
}
else if(!Double.isNaN(actualMinimum) && !Double.isInfinite(actualMinimum)) {
center = actualMinimum;
}
if(value < center) {
return 0.0;
}
double max = Double.NaN;
if(!Double.isNaN(theoreticalMaximum) && !Double.isInfinite(theoreticalMaximum)) {
max = theoreticalMaximum;
}
else if(!Double.isNaN(actualMaximum) && !Double.isInfinite(actualMaximum)) {
max = actualMaximum;
}
if(!Double.isNaN(max) && !Double.isInfinite(max) && max >= center) {
return (value - center) / (max - center);
}
return value - center;
}
/**
* @param actualMinimum the actualMinimum to set
*/
public void setActualMinimum(double actualMinimum) {
this.actualMinimum = actualMinimum;
}
/**
* @param actualMaximum the actualMaximum to set
*/
public void setActualMaximum(double actualMaximum) {
this.actualMaximum = actualMaximum;
}
@Override
public String getLongName() {
return "Outlier Score Metadata";
}
@Override
public String getShortName() {
return "outlier-score-meta";
}
}
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