ChiSquaredLikelihood.h

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#ifndef CHISQUAREDLIKELIHOOD_H
#define CHISQUAREDLIKELIHOOD_H
 
#include <cmath>
#include <stdexcept>
#include <vector>
 
#include "BaseLikelihood.h"
 
 
class ChiSquaredLikelihood final : public BaseLikelihood {
public:
    ChiSquaredLikelihood(
        const ModelFn& model,
        std::shared_ptr<LikelihoodContext> ctx,
        std::size_t p_dim,
        RealMatrix covariance_inv
    );
 
    double nll(const std::vector<double>& theta) const override;
 
    std::size_t dim() const override;
 
    RealMatrix observable_curvature(
        const std::vector<double>& r
    ) const override;
 
    RealMatrix nuisance_curvature(
        const std::vector<double>& eta
    ) const override;
 
private:
    RealMatrix covariance_inv_;     
};
 
#endif // CHISQUAREDLIKELIHOOD_H