Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Pow.java @ 2763:2f7fed1eb4bf
Removed needless imports.
flys-artifacts/trunk@4499 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 24 May 2012 08:00:14 +0000 |
parents | 0dd58ab7e118 |
children | 4dda67a893da |
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package de.intevation.flys.artifacts.math.fitting; public class Pow extends Function { public Pow() { super( "pow", "W(Q) = a*Q^c + d", new String [] { "a", "c", "d" }); } @Override public double value(double x, double [] parameters) { return parameters[0]*Math.pow(x, parameters[1]) + parameters[2]; } @Override public double [] gradient(double x, double [] parameters) { double a = parameters[0]; double c = parameters[1]; double x_c = Math.pow(x, c); return new double [] { x_c, a*x_c*Math.log(x), 1d }; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :