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/**
\file bpl1d.hpp
\brief broken powerlaw
\author Junhua Gu
*/
#ifndef BROKEN_POWER_LAW_MODEL_H_
#define BROKEN_POWER_LAW_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
namespace opt_utilities
{
template <typename T>
class bpl1d
:public model<T,T,std::vector<T>,std::string>
{
private:
model<T,T,std::vector<T> >* 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<std::vector<T> >("bpx",1));
this->push_param_info(param_info<std::vector<T> >("bpy",1));
this->push_param_info(param_info<std::vector<T> >("gamma1",1));
this->push_param_info(param_info<std::vector<T> >("gamma2",1));
}
T do_eval(const T& x,const std::vector<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);
if(x<x_b)
{
return f_b*pow(x,gamma1)/pow(x_b,gamma1);
}
else
{
return f_b*pow(x,gamma2)/pow(x_b,gamma2);
}
}
private:
std::string do_get_information()const
{
return "";
//return "<math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"block\" class=\"equation\"><mi>f</mi><mrow><mo class=\"MathClass-open\">(</mo><mrow><mi>x</mi><mo class=\"MathClass-punc\">;</mo><msub><mrow><mi>x</mi></mrow><mrow><mi>b</mi></mrow></msub><mo class=\"MathClass-punc\">,</mo><msub><mrow><mi>y</mi></mrow><mrow><mi>b</mi></mrow></msub><mo class=\"MathClass-punc\">,</mo><msub><mrow><mi>γ</mi></mrow><mrow><mn>1</mn></mrow></msub><mo class=\"MathClass-punc\">,</mo><msub><mrow><mi>γ</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mo class=\"MathClass-close\">)</mo></mrow> <mo class=\"MathClass-rel\">=</mo> <mfenced separators=\"\" open=\"{\" close=\"\"><mrow> <mtable style=\"\" equalrows=\"false\" equalcolumns=\"false\" class=\"array\"><mtr><mtd class=\"array\" columnalign=\"center\"><msub><mrow><mi>y</mi></mrow><mrow><mi>b</mi></mrow></msub> <mfrac><mrow><msup><mrow><mi>x</mi></mrow><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></msup></mrow><mrow><msubsup><mrow><mi>x</mi></mrow><mrow><mi>b</mi></mrow><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></msubsup></mrow></mfrac></mtd><mtd class=\"array\" columnalign=\"center\"> <mi>x</mi> <mo class=\"MathClass-rel\"><</mo> <msub><mrow><mi>x</mi></mrow><mrow><mi>b</mi></mrow></msub></mtd></mtr><mtr><mtd class=\"array\" columnalign=\"center\"> <msub><mrow><mi>y</mi></mrow><mrow><mi>b</mi></mrow></msub> <mfrac><mrow><msup><mrow><mi>x</mi></mrow><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msup></mrow><mrow><msubsup><mrow><mi>x</mi></mrow><mrow><mi>b</mi></mrow><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msubsup></mrow></mfrac> </mtd><mtd class=\"array\" columnalign=\"center\"><mi>o</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>r</mi><mi>w</mi><mi>i</mi><mi>s</mi><mi>e</mi></mtd></mtr><mtr><mtd class=\"array\" columnalign=\"center\"> </mtd></mtr> <!--cc--></mtable></mrow></mfenced></math>";
}
};
}
#endif
//EOF
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