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ProfileChiSquared1D.h
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ProfileChiSquared1D.h
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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2021 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/Functions/ChebfunBase.h"
#include "MantidCurveFitting/GSLMatrix.h"
#include "MantidCurveFitting/IFittingAlgorithm.h"
#include "MantidKernel/System.h"
namespace Mantid {
namespace CurveFitting {
namespace Algorithms {
/**
Profiles chi2 about its minimum to find parameter errors
*/
class MANTID_CURVEFITTING_DLL ProfileChiSquared1D : public IFittingAlgorithm {
public:
ProfileChiSquared1D();
const std::string name() const override;
int version() const override;
const std::vector<std::string> seeAlso() const override { return {"CalculateChiSquared", "Fit"}; }
const std::string summary() const override;
private:
void initConcrete() override;
void execConcrete() override;
void unfixParameters();
void refixParameters();
GSLMatrix getCovarianceMatrix();
std::tuple<double, double> getChiSquaredRoots(const Functions::ChebfunBase_sptr &approximation,
std::vector<double> &coeffs, double qvalue, double rBound,
double lBound) const;
/// Cache indices of fixed parameters
std::vector<size_t> m_fixedParameters;
};
} // namespace Algorithms
} // namespace CurveFitting
} // namespace Mantid