StdMath.h

/*
 * Hal::StdMath.h
 *
 *  Created on: 30-04-2022
 *      Author: Daniel Wielanek
 *      E-mail: daniel.wielanek@gmail.com
 *      Warsaw University of Technology, Faculty of Physics
 */
#ifndef HALSTDMATH_H_
#define HALSTDMATH_H_
 
#include <TMath.h>
#include <TMatrixD.h>
#include <TVector3.h>
#include <vector>
 
class TH1;
class TH2;
namespace Hal {
  namespace Std {
    void FitParabola(Double_t x1,
                     Double_t x2,
                     Double_t x3,
                     Double_t y1,
                     Double_t y2,
                     Double_t y3,
                     Double_t& a,
                     Double_t& b,
                     Double_t& c);
    Int_t SolveParabola(Double_t a, Double_t b, Double_t c, Double_t& x1, Double_t& x2);
    Int_t Bin3dToBin1d(Int_t nbinsX, Int_t nBinsY, Int_t binX, Int_t binY, Int_t binZ, Bool_t root_number = kTRUE);
    TMatrixD GetVec(const TH1& h, Bool_t horizontal = kFALSE);
    TMatrixD GetMatrix(const TH2& h, Bool_t swaprow = kFALSE);
    TVector3 Bin1dToBin3d(Int_t nbinsX, Int_t nBinsY, Int_t bin, Bool_t root_number = kTRUE);
    Double_t Discretize(Int_t areas, Double_t min, Double_t max, Double_t val, Char_t type);
    Double_t StatError2Var(Char_t ope, Double_t x, Double_t y, Double_t dx = -1, Double_t dy = -1);
    Int_t MultiToOneDimIndex(const std::vector<int>& size, const std::vector<int>& position);
    std::vector<int> OneToMultiDimIndex(const std::vector<int>& size, Int_t n);
    std::pair<Int_t, Int_t> Division(Int_t num, Int_t div);
  }  // namespace Std
}  // namespace Hal
#endif /* HAL_FEATURES_STD_HALSTDMATH_H_ */