Chi2.h

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/********************************************************************
 *  Copyright (C) 2014 by Federico Marulli and Alfonso Veropalumbo  *
 *  federico.marulli3@unibo.it                                      *
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
 *  GNU General Public License for more details.                    *
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#ifndef __CHI2__
#define __CHI2__
 
#include "Likelihood.h"
 
 
// ============================================================================================
 
 
namespace cbl {
 
  namespace statistics {
    
    class Chi2 : public Likelihood
    {
 
    public:
 
 
      Chi2 () : Likelihood() {}
 
      Chi2 (const std::shared_ptr<data::Data> data, const std::shared_ptr<Model> model, const bool use_covariance=false, const std::vector<size_t> x_index={0,2}, const int w_index=-1);
 
      ~Chi2 () = default;
 
 
      double operator () (std::vector<double> &pp) const;
 
      void minimize (const std::vector<double> start, const std::vector<std::vector<double>> parameter_limits, const unsigned int max_iter=10000, const double tol=1.e-6, const double epsilon=1.e-3); 
 
    };
  }
}
 
#endif