ROCCurve.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: Timo Sachsenberg $
// $Authors: $
// --------------------------------------------------------------------------
 
#pragma once
 
#include <OpenMS/config.h>
#include <OpenMS/CONCEPT/Types.h>
 
#include <list>
#include <vector>
 
namespace OpenMS
{
  namespace Math
  {
    class OPENMS_DLLAPI ROCCurve
    {
public:
 
      // @name Constructors and Destructors
      // @{
      ROCCurve();
 
      explicit ROCCurve(const std::vector<std::pair<double,bool>> & pairs);
 
      virtual ~ROCCurve() = default;
 
      ROCCurve(const ROCCurve & source);
      // @}
 
      // @name Operators
      // @{
      ROCCurve & operator=(const ROCCurve & source);
      // @}
 
      // @name Accessors
      // @{
      void insertPair(double score, bool clas);
 
      double AUC();
 
      double rocN(Size N);
 
      std::vector<std::pair<double, double> > curve(UInt resolution = 10);
 
      double cutoffPos(double fraction = 0.95);
 
      double cutoffNeg(double fraction = 0.95);
 
      // @}
 
private:
      inline void sort();
 
      inline void count();
 
      inline double trapezoidal_area(double x1, double x2, double y1, double y2);
 
      class OPENMS_DLLAPI simsortdec
      {
public:
 
        bool operator()(const std::pair<double, bool> & a, const std::pair<double, bool> & b)
        {
          return b.first < a.first;
        }
 
      };
 
 
      std::vector<std::pair<double, bool> > score_clas_pairs_;
 
      UInt pos_{};
 
      UInt neg_{};
 
      bool sorted_{};
    };
  }
}