package org.freehep.math.minuit.example.tutorial;
import org.freehep.math.minuit.FCNGradientBase;
/**
*
* @version $Id: Quad2F.java 8584 2006-08-10 23:06:37Z duns $
*/
class Quad2F implements FCNGradientBase
{
public double valueOf(double[] par)
{
double x = par[0];
double y = par[1];
return x*x + y*y;
}
public double[] gradient(double[] par)
{
double x = par[0];
double y = par[1];
double[] result = { 2.*x, 2.*y };
return result;
}
}