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/**
\file quad_pl.hpp
\brief power law model
\author Junhua Gu
*/
#ifndef QUAD_PL_MODEL_H_
#define QUAD_PL_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
#include <misc/optvec.hpp>
namespace opt_utilities
{
template <typename T>
class quad_pl
:public model<optvec<T>,optvec<T>,optvec<T>,std::string>
{
private:
quad_pl* do_clone()const
{
return new quad_pl<T>(*this);
}
const char* do_get_type_name()const
{
return "quad power law";
}
public:
quad_pl()
{
this->push_param_info(param_info<optvec<T> >("a",1));
this->push_param_info(param_info<optvec<T> >("b",1));
this->push_param_info(param_info<optvec<T> >("c",1));
}
optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
{
T a=get_element(param,0);
T b=get_element(param,1);
T c=get_element(param,2);
return c*exp(a*log(x)*log(x)+b*log(x));
}
private:
std::string do_get_information()const
{
return "Simple power law model\n"
"y=A*x^gamma\n";
}
};
}
#endif
//EOF
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