g@9646: /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
g@9646:  * Software engineering by
g@9646:  *  Björnsen Beratende Ingenieure GmbH
g@9646:  *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
g@9646:  *
g@9646:  * This file is Free Software under the GNU AGPL (>=v3)
g@9646:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
g@9646:  * documentation coming with Dive4Elements River for details.
g@9646:  */
g@9646: package org.dive4elements.river.artifacts.model.fixings.fitting;
g@9646: 
g@9646: import org.apache.commons.math3.stat.StatUtils;
g@9646: 
g@9646: /**
g@9646:  * @author Gernot Belger
g@9646:  */
g@9646: final class SQRTFunction {
g@9646:     private final ArraySubstraction substraction;
g@9646: 
g@9646:     public SQRTFunction(final double[] observations) {
g@9646:         this.substraction = new ArraySubstraction(observations);
g@9646:     }
g@9646: 
g@9646:     public double calc_sqrt(final double[] values) {
g@9646: 
g@9646:         final double[] difference = this.substraction.evaluate(values);
g@9646: 
g@9646:         return StatUtils.sumSq(difference);
g@9646:     }
g@9646: }