TFCS1DFunctionInt16Histogram.cxx File Reference

#include "ISF_FastCaloSimEvent/TFCS1DFunctionInt16Histogram.h"
#include <algorithm>
#include <iostream>
#include "TMath.h"
#include "TCanvas.h"
#include "TH2F.h"
#include "TRandom.h"
#include "TFile.h"

Include dependency graph for TFCS1DFunctionInt16Histogram.cxx:

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Functions
void TFCS1DFunctionInt16Histogram::unit_test	ATLAS_NOT_THREAD_SAFE (TH1 *hist)

Function Documentation

ATLAS_NOT_THREAD_SAFE()

void TFCS1DFunctionInt16Histogram::unit_test ATLAS_NOT_THREAD_SAFE

(

TH1 *

hist

)

Definition at line 94 of file TFCS1DFunctionInt16Histogram.cxx.

                                                                            {
  ISF_FCS::MLogging logger;
  int nbinsx;
  if (hist == nullptr) {
    nbinsx = 50;
    hist = new TH1D("test1D", "test1D", nbinsx, 0, 1);
    hist->Sumw2();
    for (int ix = 1; ix <= nbinsx; ++ix) {
      double val = (0.5 + gRandom->Rndm()) * (nbinsx + ix);
      if (gRandom->Rndm() < 0.1)
        val = 0;
      hist->SetBinContent(ix, val);
      hist->SetBinError(ix, 0);
    }
  }
  TFCS1DFunctionInt16Histogram rtof(hist);
  nbinsx = hist->GetNbinsX();
 
  float value[2];
  float rnd[2];
  //cppcheck-suppress uninitvar
  for (rnd[0] = 0; rnd[0] < 0.9999; rnd[0] += 0.25) {
    rtof.rnd_to_fct(value, rnd);
    ATH_MSG_NOCLASS(logger, "rnd0=" << rnd[0] << " -> x=" << value[0]);
  }
 
  TH1 *hist_val = (TH1 *)hist->Clone("hist_val");
  hist_val->SetTitle("difference");
  hist_val->Reset();
  int nrnd = 100000;
  double weight = hist->Integral() / nrnd;
  hist_val->Sumw2();
  for (int i = 0; i < nrnd; ++i) {
    rnd[0] = gRandom->Rndm();
    rtof.rnd_to_fct(value, rnd);
    hist_val->Fill(value[0], weight);
  }
  hist_val->Add(hist, -1);
 
  TH1F *hist_pull = new TH1F("pull", "pull", 200, -10, 10);
  for (int ix = 1; ix <= nbinsx; ++ix) {
    float val = hist_val->GetBinContent(ix);
    float err = hist_val->GetBinError(ix);
    if (err > 0)
      hist_pull->Fill(val / err);
    ATH_MSG_NOCLASS(logger, "val=" << val << " err=" << err);
  }
 
// Screen output in athena won't make sense and would require linking of
// additional libraries
#if defined(__FastCaloSimStandAlone__)
  new TCanvas("input", "Input");
  hist->Draw();
 
  new TCanvas("validation", "Validation");
  hist_val->Draw();
 
  new TCanvas("pull", "Pull");
  hist_pull->Draw();
#endif
}