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/**
\file bpl.hpp
\brief broken power law
\author Junhua Gu
*/
#ifndef BROKEN_POWER_LAW_MODEL_H_
#define BROKEN_POWER_LAW_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
#include <misc/optvec.hpp>
namespace opt_utilities
{
template <typename T>
class bpl1d
:public model<optvec<T>,optvec<T>,optvec<T>,std::string>
{
private:
bpl1d* do_clone()const
{
return new bpl1d<T>(*this);
}
const char* do_get_type_name()const
{
return "broken power law";
}
public:
bpl1d()
{
this->push_param_info(param_info<optvec<T> >("bpx",1));
this->push_param_info(param_info<optvec<T> >("bpy",1));
this->push_param_info(param_info<optvec<T> >("gamma1",1));
this->push_param_info(param_info<optvec<T> >("gamma2",1));
}
optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
{
T x_b=get_element(param,0);
T f_b=get_element(param,1);
T gamma1=get_element(param,2);
T gamma2=get_element(param,3);
optvec<T> result(x.size());
for(int i=0;i<result.size();++i)
{
if(x[i]<x_b)
{
result[i]=f_b*pow(x[i],gamma1)/pow(x_b,gamma1);
}
else
{
result[i]=f_b*pow(x[i],gamma2)/pow(x_b,gamma2);
}
}
return result;
}
private:
std::string do_get_information()const
{
#ifdef WITH_OPT_DOC
#include <model_doc/bpl.info>
#endif
return "";
}
};
}
#endif
//EOF
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