62 lines
1.5 KiB
Java
62 lines
1.5 KiB
Java
package presenter.evaluation;
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import model.Line;
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import presenter.algorithms.util.FastElementSelector;
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import java.util.ArrayList;
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import java.util.LinkedList;
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/**
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* Implementierung verschiedener Algorithmen zur Berechnung von Ausgleichsgeraden.
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*
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* @Author: Armin Wolf
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* @Email: a_wolf28@uni-muenster.de
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* @Date: 07.09.2017.
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*/
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public class ScaleDependentMeasure {
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private ArrayList<Double> errorValues;
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public ScaleDependentMeasure(final LinkedList<Line> lines, Double m, Double b) {
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//Liste mit den Fehler zu jedem Punkt
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errorValues = new ArrayList<>();
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for (Line line : lines) {
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Double e = Math.pow(m * line.getM() - line.getB() + b, 2) / (Math.pow(m, 2) + 1);
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errorValues.add(e);
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}
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}
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/* Skalierungs Abhängige Approximationsgüten */
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//unterschiedliche Alg.- auf einem Datensatz
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public Double mse() {
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double error = 0;
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for (Double d : errorValues) {
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error += Math.pow(d, 2);
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}
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error /= errorValues.size();
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return error;
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}
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public Double rmse() {
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return Math.sqrt(mse());
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}
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public Double mae() {
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double error = 0;
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for (Double d : errorValues) {
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error += Math.abs(d);
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}
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error /= errorValues.size();
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return error;
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}
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public Double mdae() {
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return FastElementSelector
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.randomizedSelect(errorValues, errorValues.size() * 0.5);
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}
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}
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