Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/fitting/Quad.java @ 2723:5ce5abd173b9
Added skeleton for gauge discharge curves.
flys-artifacts/trunk@4454 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 22 May 2012 09:06:02 +0000 |
parents | 0dd58ab7e118 |
children | 4dda67a893da |
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package de.intevation.flys.artifacts.math.fitting; public class Quad extends Function { public Quad() { super( "quad", "W(Q) = n*Q^2 + m*Q + b", new String [] { "n", "m", "b" }); } @Override public double value(double x, double [] parameters) { // n*Q^2 + m*Q + b <=> Q*(n*Q + m) + b return x*(parameters[0]*x + parameters[1]) + parameters[2]; } @Override public double [] gradient(double x, double [] parameters) { return new double [] { x*x, x, 1d }; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :