SiPixelSCurveCalibrationAnalysis.cc File Reference

#include "CalibTracker/SiPixelSCurveCalibration/interface/SiPixelSCurveCalibrationAnalysis.h"
#include "TMath.h"
#include <fstream>
#include <iostream>
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "CondFormats/SiPixelObjects/interface/DetectorIndex.h"
#include "CondFormats/SiPixelObjects/interface/ElectronicIndex.h"
#include "CondFormats/SiPixelObjects/interface/LocalPixel.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFrameConverter.h"
#include "DataFormats/SiPixelDigi/interface/SiPixelCalibDigiError.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include <sstream>

Go to the source code of this file.

Functions
void	calculateEffAndError (int nADCResponse, int nTriggers, float &eff, float &error)
void	chi2toMinimize (int &npar, double *grad, double &fcnval, double *xval, int iflag)

Function Documentation

void calculateEffAndError	(	int	nADCResponse,
		int	nTriggers,
		float &	eff,
		float &	error
	)

Definition at line 270 of file SiPixelSCurveCalibrationAnalysis.cc.

Referenced by SiPixelSCurveCalibrationAnalysis::doFits().

                                                                                     {
  eff = (float)nADCResponse / (float)nTriggers;
  double effForErrorCalculation = eff;
  if (eff <= 0 || eff >= 1)
    effForErrorCalculation = 0.5 / (double)nTriggers;
  error = TMath::Sqrt(effForErrorCalculation * (1 - effForErrorCalculation) / (double)nTriggers);
}

void chi2toMinimize	(	int &	npar,
		double *	grad,
		double &	fcnval,
		double *	xval,
		int	iflag
	)

Definition at line 93 of file SiPixelSCurveCalibrationAnalysis.cc.

References SiPixelSCurveCalibrationAnalysis::effErrors_, SiPixelSCurveCalibrationAnalysis::efficiencies_, SiPixelOfflineCalibAnalysisBase::fitFunction_, SiPixelOfflineCalibAnalysisBase::getVcalValues(), and mps_fire::i.

Referenced by SiPixelSCurveCalibrationAnalysis::doFits().

                                                                                      {
  TF1 *theFormula = SiPixelSCurveCalibrationAnalysis::fitFunction_;
  // setup function parameters
  for (int i = 0; i < npar; i++)
    theFormula->SetParameter(i, xval[i]);
  fcnval = 0;
  // compute Chi2 of all points
  const std::vector<short> *theVCalValues = SiPixelSCurveCalibrationAnalysis::getVcalValues();
  for (uint32_t i = 0; i < theVCalValues->size(); i++) {
    float chi = (SiPixelSCurveCalibrationAnalysis::efficiencies_[i] - theFormula->Eval((*theVCalValues)[i]));
    chi /= SiPixelSCurveCalibrationAnalysis::effErrors_[i];
    fcnval += chi * chi;
  }
}