Chebyshev.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2007 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
 
//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include "MantidCurveFitting/Functions/BackgroundFunction.h"
#include <valarray>
 
namespace Mantid {
namespace CurveFitting {
namespace Functions {
class MANTID_CURVEFITTING_DLL Chebyshev : public BackgroundFunction {
public:
  Chebyshev();
 
  std::string name() const override { return "Chebyshev"; }
  const std::string category() const override { return "Background"; }
  void function1D(double *out, const double *xValues, const size_t nData) const override;
  void functionDeriv1D(API::Jacobian *out, const double *xValues, const size_t nData) override;
 
  void setAttribute(const std::string &attName, const Attribute &) override;
 
private:
  int m_n;
  double m_StartX;
  double m_EndX;
  mutable std::valarray<double> m_b;
};
 
using Chebyshev_sptr = std::shared_ptr<Chebyshev>;
 
} // namespace Functions
} // namespace CurveFitting
} // namespace Mantid