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#ifndef NBETA_MODEL_H_
#define NBETA_MODEL_H_
#include <core/fitter.hpp>
#include <cmath>
#include <iostream>
namespace opt_utilities
{
template <typename T>
class nbeta1d
:public model<T,T,std::vector<T> ,std::string>
{
private:
model<T,T,std::vector<T> >* do_clone()const
{
return new nbeta1d<T>(*this);
}
public:
nbeta1d()
{
this->push_param_info(param_info<std::vector<T> >("S0",1));
this->push_param_info(param_info<std::vector<T> >("rc",10));
this->push_param_info(param_info<std::vector<T> >("beta",2./3.));
this->push_param_info(param_info<std::vector<T> >("bkg",0));
}
T do_eval(const T& x,const std::vector<T>& param)
{
T S0=get_element(param,0);
T r_c=get_element(param,1);
T beta=get_element(param,2);
T bkg=get_element(param,3);
return bkg+S0*pow(1+(x*x)/(r_c*r_c),-3./2.*beta);
}
private:
std::string do_to_string()const
{
return "density beta model\n"
"n=n0*(1+(r/rc)^2)^(-1.5*beta)\n";
}
};
};
#endif
//EOF
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