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/**
\file beta1d.hpp
\brief 1d beta model
\author Junhua Gu
*/
#ifndef VBETA_MODEL_H_
#define VBETA_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <misc/optvec.hpp>
#include <cmath>
namespace opt_utilities
{
template <typename T>
class beta1d
:public model<optvec<T>,optvec<T>,optvec<T>,std::string>
{
typedef optvec<T> Tv;
private:
beta1d<T>* do_clone()const
{
return new beta1d<T>(*this);
}
const char* do_get_type_name()const
{
return "1d surface brightness beta model";
}
public:
beta1d()
{
this->push_param_info(param_info<Tv>("S0",1));
this->push_param_info(param_info<Tv>("rc",10));
this->push_param_info(param_info<Tv>("beta",2./3.));
this->push_param_info(param_info<Tv>("bkg",0));
}
public:
Tv do_eval(const Tv& x,const Tv& param)
{
Tv result(x.size());
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 x*get_element(param,0)+get_element(param,1);
for(size_t i=0;i!=x.size();++i)
{
result[i]=bkg+S0*pow(1+(x[i]*x[i])/(r_c*r_c),-3*beta+static_cast<T>(.5));
}
return result;
}
private:
std::string do_get_information()const
{
#ifdef WITH_OPT_DOC
#include <model_doc/beta1d.info>
#endif
return "";
}
};
}
#endif
//EOF
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