CubicSpline2d.h

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// Copyright (c) 2002-2023, The OpenMS Team -- EKU Tuebingen, ETH Zurich, and FU Berlin
// SPDX-License-Identifier: BSD-3-Clause
//
// --------------------------------------------------------------------------
// $Maintainer: Lars Nilse $
// $Authors: Lars Nilse $
// --------------------------------------------------------------------------
 
#pragma once
 
#include <OpenMS/OpenMSConfig.h>
 
#include <vector>
#include <map>
 
namespace OpenMS
{
  class OPENMS_DLLAPI CubicSpline2d
  {
 
    std::vector<double> a_; 
    std::vector<double> b_; 
    std::vector<double> c_; 
    std::vector<double> d_; 
    std::vector<double> x_; 
 
public:
 
    CubicSpline2d(const std::vector<double>& x, const std::vector<double>& y);
 
    CubicSpline2d(const std::map<double, double>& m);
 
    double eval(double x) const;
 
    double derivative(double x) const;
 
    double derivatives(double x, unsigned order) const;
 
private:
 
    void init_(const std::vector<double>& x, const std::vector<double>& y);
 
  };
 
}