#ifndef NFW_MODEL_H_
#define NFW_MODEL_H_
#include <core/fitter.hpp>
#include <cmath>
#include <iostream>
namespace opt_utilities
{
  template <typename T>
  class nfw1d
    :public model<T,T,std::vector<T>,std::string>
  {
  private:
    model<T,T,std::vector<T> >* do_clone()const
    {
      return new nfw1d<T>(*this);
    }
  public:
    nfw1d()
    {
      this->push_param_info(param_info<std::vector<T> >("rho0",1.));
      this->push_param_info(param_info<std::vector<T> >("rs",1.));
    }


    T do_eval(const T& x,const std::vector<T>& param)
    {
      T rho0=get_element(param,0);
      T rs=get_element(param,1);
      

      return rho0/(x/rs*(1+x/rs)*(1+x/rs));
    }

    std::string do_to_string()const
    {
      return "NFW model\n"
	"y=rho0/(r/rs*(1+r/rs)^2\n";
    }
  };
};



#endif
//EOF