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/**
\file vchisq.hpp
\brief chi-square statistic
\author Junhua Gu
*/
#ifndef VCHI_SQ_HPP
#define VCHI_SQ_HPP
#define OPT_HEADER
#include <core/fitter.hpp>
#include <iostream>
#include <vector>
#include <misc/optvec.hpp>
#include <cmath>
using std::cerr;
using std::endl;
namespace opt_utilities
{
template<typename T>
class vchisq
:public statistic<std::vector<T>,std::vector<T>,std::vector<T>,T,std::string>
{
private:
bool verb;
int n;
bool limit_bound;
typedef std::vector<T> Tp;
vchisq<T>* do_clone()const
{
return new vchisq<T>(*this);
}
const char* do_get_type_name()const
{
return "chi^2 statistic";
}
public:
void verbose(bool v)
{
verb=v;
}
void set_limit()
{
limit_bound=true;
}
void clear_limit()
{
limit_bound=false;
}
public:
vchisq()
:verb(false),limit_bound(false)
{}
T do_eval(const std::vector<T>& p)
{
if(limit_bound)
{
if(!this->get_fitter().get_model().meets_constraint(p))
{
return 1e99;
}
}
T result(0);
std::vector<float> vx;
std::vector<float> vy;
std::vector<float> vye;
std::vector<float> my;
float x1=1e99,x2=-1e99,y1=1e99,y2=-1e99;
if(verb)
{
n++;
if(n%100==0)
{
vx.resize(this->get_data_set().get_data(0).get_y().size());
vy.resize(this->get_data_set().get_data(0).get_y().size());
vye.resize(this->get_data_set().get_data(0).get_y().size());
my.resize(this->get_data_set().get_data(0).get_y().size());
}
}
for(int i=(this->get_data_set()).size()-1;i>=0;--i)
{
const std::vector<double> y_model(this->eval_model(this->get_data_set().get_data(i).get_x(),p));
const std::vector<double>& y=this->get_data_set().get_data(i).get_y();
const std::vector<double>& ye=this->get_data_set().get_data(i).get_y_lower_err();
for(size_t j=0;j<y.size();++j)
{
double chi=(y_model[j]-y[j])/ye[j];
result+=chi*chi;
}
if(verb&&n%100==0)
{
for(size_t j=0;j<y.size();++j)
{
vx.at(j)=((this->get_data_set().get_data(i).get_x().at(j)+this->get_data_set().get_data(i).get_x().at(j+1))/2.);
vy.at(j)=(y[j]);
vye.at(j)=ye[j];
my.at(j)=(y_model[j]);
x1=std::min(vx.at(j),x1);
y1=std::min(vy.at(j),y1);
x2=std::max(vx.at(j),x2);
y2=std::max(vy.at(j),y2);
vye[j]=log10(vy[j]+vye[j])-log10(vy[j]);
vx[j]=log10(vx[j]);
vy[j]=log10(vy[j]);
my[j]=log10(my[j]);
}
}
}
if(verb)
{
if(n%100==0)
{
cerr<<result<<"\t";
for(size_t i=0;i<get_size(p);++i)
{
cerr<<get_element(p,i)<<",";
}
cerr<<endl;
}
}
return result;
}
};
}
#endif
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