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/**
\file nbeta1d.hpp
\brief 1d density beta model
\author Junhua Gu
*/
#ifndef VNBETA_MODEL_H_
#define VNBETA_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <misc/optvec.hpp>
#include <cmath>
namespace opt_utilities
{
template <typename T>
class nbeta1d
:public model<optvec<T>,optvec<T>,optvec<T>,std::string>
{
typedef optvec<T> Tv;
private:
nbeta1d<T>* do_clone()const
{
return new nbeta1d<T>(*this);
}
const char* do_get_type_name()const
{
return "1d density beta model";
}
public:
nbeta1d()
{
this->push_param_info(param_info<Tv>("n0",1));
this->push_param_info(param_info<Tv>("rc",10));
this->push_param_info(param_info<Tv>("beta",2./3.));
}
public:
Tv do_eval(const Tv& x,const Tv& param)
{
Tv result(x.size());
T n0=get_element(param,0);
T r_c=get_element(param,1);
T beta=get_element(param,2);
//return x*get_element(param,0)+get_element(param,1);
for(size_t i=0;i!=x.size();++i)
{
result[i]=n0*pow(1+(x[i]*x[i])/(r_c*r_c),-3./2.*beta);
}
return result;
}
private:
std::string do_get_information()const
{
return "";
}
};
}
#endif
//EOF
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