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/**
\file exp_bkg.hpp
\brief power law model
\author Junhua Gu
*/
#ifndef EXP_BKG_MODEL_H_
#define EXP_BKG_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
#include <misc/optvec.hpp>
namespace opt_utilities
{
template <typename T>
class exp_bkg
:public model<optvec<T>,optvec<T>,optvec<T>,std::string>
{
private:
exp_bkg* do_clone()const
{
return new exp_bkg<T>(*this);
}
const char* do_get_type_name()const
{
return "exp with bkg";
}
public:
exp_bkg()
{
this->push_param_info(param_info<optvec<T> >("Ampl",1));
this->push_param_info(param_info<optvec<T> >("scale",1));
this->push_param_info(param_info<optvec<T> >("bkg",1));
}
optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
{
T A=get_element(param,0);
T scale=get_element(param,1);
T bkg=get_element(param,2);
return A*exp(-x/abs(scale))+bkg;
}
private:
std::string do_get_information()const
{
#ifdef WITH_OPT_DOC
#include <model_doc/exp_bkg.info>
#endif
return "";
}
};
}
#endif
//EOF
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