CostFuncUnweightedLeastSquares.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2015 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include "MantidCurveFitting/CostFunctions/CostFuncLeastSquares.h"
 
namespace Mantid {
namespace CurveFitting {
namespace CostFunctions {
 
class MANTID_CURVEFITTING_DLL CostFuncUnweightedLeastSquares : public CostFuncLeastSquares {
public:
  CostFuncUnweightedLeastSquares();
 
  std::string name() const override { return "Unweighted least squares"; }
  std::string shortName() const override { return "Chi-sq-unw."; }
 
protected:
  void calActiveCovarianceMatrix(EigenMatrix &covar, double epsrel) override;
  std::vector<double> getFitWeights(API::FunctionValues_sptr values) const override;
 
  double getResidualVariance() const;
};
 
} // namespace CostFunctions
} // namespace CurveFitting
} // namespace Mantid