Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/math/fitting/Linear.java @ 6714:b265cd6cfda5
issue748: Change StandardDeviation implmentation to what BFG calls Standard Deviation
Which is actually a calculation that removes outliers based on
Standard Error
Developed and analyized together with Tom.
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Tue, 30 Jul 2013 17:32:28 +0200 |
parents | af13ceeba52a |
children |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.math.fitting; public class Linear extends Function { public static final Derivative DERIVATIVE = new Derivative("W'(Q) = m") { @Override public org.dive4elements.river.artifacts.math.Function instantiate(double [] parameters) { final double m = parameters[0]; return new org.dive4elements.river.artifacts.math.Function() { @Override public double value(double Q) { return m; } }; } }; public static final Function INSTANCE = new Linear(); public Linear() { super("linear", "W(Q) = m*Q + b", new String [] { "m", "b" }); } @Override public double value(double x, double [] parameters) { return x*parameters[0] + parameters[1]; } @Override public double [] gradient(double x, double [] parameters) { return new double [] { x, 1d }; } @Override public Derivative getDerivative() { return DERIVATIVE; } @Override public Function getInverse() { return InvLinear.INSTANCE; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :