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#ifndef BROKEN_LINE_MODEL_H_
#define BROKEN_LINE_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
#include <misc/optvec.hpp>
namespace opt_utilities
{
template <typename T>
class bl
:public model<optvec<T>,optvec<T>,optvec<T>,std::string>
{
private:
model<optvec<T>,optvec<T>,optvec<T>,std::string >* do_clone()const
{
return new bl<T>(*this);
}
const char* do_get_type_name()const
{
return "broken linear model";
}
public:
bl()
{
this->push_param_info(param_info<optvec<T> >("break point y value",1));
this->push_param_info(param_info<optvec<T> >("break point x value",1));
this->push_param_info(param_info<optvec<T> >("slop 1",1));
this->push_param_info(param_info<optvec<T> >("slop 2",1));
}
public:
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 k1=get_element(param,2);
T k2=get_element(param,3);
optvec<double> result(x.size());
for(int i=0;i<x.size();++i)
{
if(x[i]<x_b)
{
result[i]=k1*(x[i]-x_b)+f_b;
}
else
{
result[i]=k2*(x[i]-x_b)+f_b;
}
}
return result;
}
private:
std::string do_get_information()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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