Histograms.h File Reference

#include <cmath>
#include <iostream>
#include <string>
#include <TH1F.h>
#include "DQMServices/Core/interface/DQMStore.h"
#include "DQMServices/Core/interface/ConcurrentMonitorElement.h"
#include "DQMServices/Core/interface/MonitorElement.h"

Go to the source code of this file.

Classes
class	HEff1DHit
	A set of histograms fo efficiency computation for 1D RecHits (producer) More...
class	HEff1DHitHarvest
	A set of histograms fo efficiency computation for 1D RecHits (harvesting) More...
class	HEff2DHit
class	HEff2DHitHarvest
class	HEff4DHit
	A set of histograms for efficiency 4D RecHits (producer) More...
class	HEff4DHitHarvest
	A set of histograms for efficiency 4D RecHits (harvesting) More...
class	HRes1DHit
	A set of histograms of residuals and pulls for 1D RecHits. More...
class	HRes2DHit
class	HRes4DHit

Functions
void	divide (MonitorElement *eff, const MonitorElement *numerator, const MonitorElement *denominator)
	Function to fill an efficiency histograms with binomial errors. More...

Function Documentation

void divide ( MonitorElement *  eff, const MonitorElement *  numerator, const MonitorElement *  denominator  )

inline

Function to fill an efficiency histograms with binomial errors.

Definition at line 23 of file Histograms.h.

References stringResolutionProvider_cfi::bin, create_public_pileup_plots::bins, MonitorElement::getTH1(), and mathSSE::sqrt().

Referenced by HEff1DHitHarvest::computeEfficiency(), HEff2DHitHarvest::computeEfficiency(), HEff4DHitHarvest::computeEfficiency(), and SiChargeDivider::~SiChargeDivider().

{
  TH1 * effH = eff->getTH1();
  TH1 * numH = numerator->getTH1();
  TH1 * denH = denominator->getTH1();
  effH->Divide(numH,denH);

  // Set the error accordingly to binomial statistics
  int bins = effH->GetNbinsX();
  for (int bin = 1; bin <= bins; ++bin) {
    float den = denH->GetBinContent(bin);
    float eff = effH->GetBinContent(bin);
    float err = 0;
    if (den != 0) {
      err = sqrt(eff*(1-eff)/den);
    }
    effH->SetBinError(bin, err);
  }
  return;
}