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#include "CalibTracker/SiStripAPVAnalysis/interface/SimpleNoiseCalculator.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <cmath>
#include <numeric>
#include <algorithm>
using namespace std;
//
// Constructors
//
SimpleNoiseCalculator::SimpleNoiseCalculator() : numberOfEvents(0), alreadyUsedEvent(false) {
if (false)
cout << "Constructing SimpleNoiseCalculator " << endl;
init();
}
//
SimpleNoiseCalculator::SimpleNoiseCalculator(int evnt_ini, bool use_DB) : numberOfEvents(0), alreadyUsedEvent(false) {
if (false)
cout << "Constructing SimpleNoiseCalculator " << endl;
useDB_ = use_DB;
eventsRequiredToCalibrate_ = evnt_ini;
// eventsRequiredToUpdate_ = evnt_iter;
// cutToAvoidSignal_ = sig_cut;
init();
}
//
// Initialization.
//
void SimpleNoiseCalculator::init() {
theCMPSubtractedSignal.clear();
theNoise.clear();
theNoiseSum.clear();
theNoiseSqSum.clear();
theEventPerStrip.clear();
// theStatus.setCalibrating();
}
//
// Destructor
//
SimpleNoiseCalculator::~SimpleNoiseCalculator() {
if (false)
cout << "Destructing SimpleNoiseCalculator " << endl;
}
//
// Update the Status of Noise Calculation
//
void SimpleNoiseCalculator::updateStatus() {
if ((theStatus.isCalibrating() && numberOfEvents >= eventsRequiredToCalibrate_) ||
(useDB_ == true && numberOfEvents == 1)) {
theStatus.setUpdating();
}
}
//
// Calculate and update (when needed) Noise Values
//
void SimpleNoiseCalculator::updateNoise(ApvAnalysis::PedestalType& in) {
if (alreadyUsedEvent == false) {
alreadyUsedEvent = true;
numberOfEvents++;
if (numberOfEvents == 1 && theNoise.size() != in.size()) {
edm::LogError("SimpleNoiseCalculator:updateNoise")
<< " You did not initialize the Noise correctly prior to noise calibration.";
}
// Initialize sums used for estimating noise.
if (numberOfEvents == 1) {
theNoiseSum.clear();
theNoiseSqSum.clear();
theEventPerStrip.clear();
theNoiseSum.resize(in.size(), 0.0);
theNoiseSqSum.resize(in.size(), 0.0);
theEventPerStrip.resize(in.size(), 0);
}
unsigned int i;
// At every event Update sums used for estimating noise.
for (i = 0; i < in.size(); i++) {
theNoiseSum[i] += in[i];
theNoiseSqSum[i] += in[i] * in[i];
theEventPerStrip[i]++;
}
// Calculate noise.
if ((theStatus.isCalibrating() && numberOfEvents == eventsRequiredToCalibrate_) || theStatus.isUpdating()) {
theCMPSubtractedSignal.clear();
theNoise.clear();
for (i = 0; i < in.size(); i++) {
double avVal = (theEventPerStrip[i]) ? theNoiseSum[i] / (theEventPerStrip[i]) : 0.0;
double sqAvVal = (theEventPerStrip[i]) ? theNoiseSqSum[i] / (theEventPerStrip[i]) : 0.0;
double corr_fac = (theEventPerStrip[i] > 1) ? (theEventPerStrip[i] / (theEventPerStrip[i] - 1)) : 1.0;
double rmsVal = (sqAvVal - avVal * avVal > 0.0) ? sqrt(corr_fac * (sqAvVal - avVal * avVal)) : 0.0;
theCMPSubtractedSignal.push_back(static_cast<float>(avVal));
theNoise.push_back(static_cast<float>(rmsVal));
if (false)
cout << " SimpleNoiseCalculator::updateNoise " << theNoiseSum[i] << " " << theNoiseSqSum[i] << " "
<< theEventPerStrip[i] << " " << avVal << " " << sqAvVal << " " << (sqAvVal - avVal * avVal) << " "
<< rmsVal << endl;
}
}
updateStatus();
}
}
//
// Define New Event
//
void SimpleNoiseCalculator::newEvent() { alreadyUsedEvent = false; }
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