Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Linear.java @ 4535:b838d16c629e
Refactor BedHeightArtifacts to provide bed height single values of a range
The range of bed height single values is necessary to generate a chart for
sounding widths.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Thu, 15 Nov 2012 16:20:02 +0100 |
parents | 585c0b49e696 |
children |
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package de.intevation.flys.artifacts.math.fitting; public class Linear extends Function { public static final Derivative DERIVATIVE = new Derivative("W'(Q) = m") { @Override public de.intevation.flys.artifacts.math.Function instantiate(double [] parameters) { final double m = parameters[0]; return new de.intevation.flys.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 :