/***************************************************************************
PUserFcn.cpp
Author: Andreas Suter
e-mail: andreas.suter@psi.ch
***************************************************************************/
/***************************************************************************
* Copyright (C) 2007-2016 by Andreas Suter *
* andreas.suter@psi.ch *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <iostream>
using namespace std;
#include <cassert>
#include "PUserFcn.h"
ClassImp(PUserFcn)
//------------------------------------------------------
/**
* <p> user function example: polynome of 3rd order
*
* \f[ = \sum_{k=0}^3 c_k t^k \f]
*
* <b>meaning of paramValues:</b> \f$c_0\f$, \f$c_1\f$, \f$c_2\f$, \f$c_3\f$
*
* <b>return:</b> function value
*
* \param t time in \f$(\mu\mathrm{s})\f$, or x-axis value for non-muSR fit
* \param param parameter vector
*/
Double_t PUserFcn::operator()(Double_t t, const std::vector<Double_t> ¶m) const
{
// expected parameters: c0, c1, c2, c3
assert(param.size() == 4);
return param[0] + param[1]*t + param[2]*t*t + param[3]*t*t*t;
}