HIEventSelectionToolRun3.cxx File Reference

#include "HIEventUtils/HIEventSelectionToolRun3.h"
#include <fstream>
#include <nlohmann/json.hpp>
#include "PathResolver/PathResolver.h"

Include dependency graph for HIEventSelectionToolRun3.cxx:

Go to the source code of this file.

Macros
#define	ENUMDEF(_N)
#define	ENUMDEF(_N)
#define	ENUMDEF(_N)

Functions
std::unique_ptr< TH1D >	loadHist (const std::string &file)

Macro Definition Documentation

ENUMDEF [1/3]

#define ENUMDEF

(

_N

)

Value:

  case HI::IonDataType::_N: \
    return #_N;

ENUMDEF [2/3]

#define ENUMDEF

(

_N

)

Value:

  case HI::PileupVariation::_N: \
    return #_N;

ENUMDEF [3/3]

#define ENUMDEF

(

_N

)

Value:

  case HI::SelectionMask::_N: \
    return #_N;

Function Documentation

loadHist()

std::unique_ptr< TH1D > loadHist

(

const std::string &

file

)

Definition at line 70 of file HIEventSelectionToolRun3.cxx.

                                                    {
  const std::string path =
      PathResolver::find_file(std::string("HIEventUtils/") + file, "DATAPATH");
  std::ifstream i(path);
  if (not i) {
    throw std::runtime_error(path + " does nto exist");
  }
 
  nlohmann::json j;
  i >> j;
  i.close();
 
  const size_t nbins = j.at("fNbins").get<size_t>();
 
  auto h = std::make_unique<TH1D>(j.at("fName").get<std::string>().c_str(),
                                  j.at("fTitle").get<std::string>().c_str(),
                                  nbins, j.at("fXmin").get<double>(),
                                  j.at("fXmax").get<double>());
  const std::vector<double> bins = j.at("fArray").get<std::vector<double>>();
  if (bins.size() != j.at("fNbins").get<size_t>() + 2) {
    throw std::runtime_error(
        "Histogram " + j.at("fName").get<std::string>() +
        " has inconsistent number of bins and fNbins (should +2) value " +
        std::to_string(bins.size()) + " and " + std::to_string(nbins));
  }
 
  for (size_t bin = 0; bin < nbins + 2; bin++) {
    h->SetBinContent(bin, bins[bin]);
  }
  h->SetDirectory(0);
  return h;
}