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#ifndef BROKEN_LINE_MODEL_H_
#define BROKEN_LINE_MODEL_H_
#include <core/fitter.hpp>
#include <cmath>
namespace opt_utilities
{
template <typename T>
class bl1d
:public model<T,T,std::vector<T>,std::string>
{
private:
model<T,T,std::vector<T> >* do_clone()const
{
return new bl1d<T>(*this);
}
public:
bl1d()
{
this->push_param_info(param_info<std::vector<T> >("break point y value",1));
this->push_param_info(param_info<std::vector<T> >("break point x value",1));
this->push_param_info(param_info<std::vector<T> >("slop 1",1));
this->push_param_info(param_info<std::vector<T> >("slop 2",1));
}
public:
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 k1=get_element(param,2);
T k2=get_element(param,3);
if(x<x_b)
{
return k1*(x-x_b)+f_b;
}
else
{
return k2*(x-x_b)+f_b;
}
}
private:
std::string do_to_string()const
{
return "broken linear model\n"
"y=k1*(x-x_b)+y_b for x<x_b\n"
"y=k2*(x-x_b)+y_b otherwise\n";
}
};
};
#endif
//EOF
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