GSLFunctions.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2010 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 "MantidAPI/ICostFunction.h"
#include "MantidAPI/IFunction.h"
#include "MantidCurveFitting/CostFunctions/CostFuncLeastSquares.h"
#include "MantidCurveFitting/EigenJacobian.h"
#include <gsl/gsl_blas.h>
#include <gsl/gsl_multifit_nlin.h>
#include <gsl/gsl_multimin.h>
#include <gsl/gsl_statistics.h>
 
namespace Mantid {
namespace CurveFitting {
struct GSL_FitData {
  GSL_FitData(const std::shared_ptr<CostFunctions::CostFuncLeastSquares> &cf);
  ~GSL_FitData();
  size_t n;
  size_t p;
  API::IFunction_sptr function;
  std::shared_ptr<CostFunctions::CostFuncLeastSquares> costFunction;
  gsl_vector *initFuncParams;
  JacobianImpl1<EigenMatrix> J;
 
  // this is presently commented out in the implementation
  // gsl_matrix *holdCalculatedJacobian; ///< cache of the calculated jacobian
};
 
int gsl_f(const gsl_vector *x, void *params, gsl_vector *f);
int gsl_df(const gsl_vector *x, void *params, gsl_matrix *J);
int gsl_fdf(const gsl_vector *x, void *params, gsl_vector *f, gsl_matrix *J);
 
} // namespace CurveFitting
} // namespace Mantid