QuadraticRegression.h

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// Copyright (c) 2002-present, OpenMS Inc. -- EKU Tuebingen, ETH Zurich, and FU Berlin
// SPDX-License-Identifier: BSD-3-Clause
//
// --------------------------------------------------------------------------
// $Maintainer: Timo Sachsenberg $
// $Authors: Christian Ehrlich, Chris Bielow $
// --------------------------------------------------------------------------
 
#pragma once
 
#include <OpenMS/CONCEPT/Types.h>
#include <OpenMS/CONCEPT/Exception.h>
 
#include <iterator>
#include <vector>
 
namespace OpenMS
{
  namespace Math
  {
    class OPENMS_DLLAPI QuadraticRegression
    {
public:
      QuadraticRegression();
 
      void computeRegression(
        std::vector<double>::const_iterator x_begin,
        std::vector<double>::const_iterator x_end,
        std::vector<double>::const_iterator y_begin);
 
      void computeRegressionWeighted(
        std::vector<double>::const_iterator x_begin,
        std::vector<double>::const_iterator x_end,
        std::vector<double>::const_iterator y_begin,
        std::vector<double>::const_iterator w_begin);
 
      double eval(double x) const;
 
      static double eval(double A, double B, double C, double x);
 
      double getA() const;
 
      double getB() const;
 
      double getC() const;
 
      double getChiSquared() const;
 
protected:
      double a_;           
      double b_;           
      double c_;           
      double chi_squared_; 
    }; //class
 
  } //namespace
} //namespace