/**
   \file gauss1d.hpp
   \brief Gauss model
   \author Junhua Gu
 */

#ifndef GAUSS_MODEL_BKG_H_
#define GAUSS_MODEL_BKG_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
#include <misc/optvec.hpp>

namespace opt_utilities
{
  template <typename T>
  class gauss1d_bkg
    :public model<optvec<T>,optvec<T>,optvec<T>,std::string>
  {
  private:
    gauss1d_bkg* do_clone()const
    {
      return new gauss1d_bkg<T>(*this);
    }

    const char* do_get_type_name()const
    {
      return "1d gaussian with bkg";
    }
  public:
    gauss1d_bkg()
    {
      this->push_param_info(param_info<optvec<T> >("N",1));
      this->push_param_info(param_info<optvec<T> >("x0",0));
      this->push_param_info(param_info<optvec<T> >("sigma",1));
      this->push_param_info(param_info<optvec<T> >("bkg",0));
    }

  public:
    optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
    {
      T N=get_element(param,0);
      T x0=get_element(param,1);
      T sigma=get_element(param,2);
      T bkg=get_element(param,3);
      optvec<T> y=(x-x0)/sigma;
      return N*exp(-y*y/2.)+bkg;
    }

  private:
    std::string do_get_information()const
    {
#ifdef WITH_OPT_DOC
#include <model_doc/gauss1d_bkg.info>
#endif
      return "";
    }
  };
}



#endif
//EOF