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#include <DTMeanTimerFitter.h>
Public Member Functions | |
| DTMeanTimerFitter (TFile *file) | |
| Constructor. | |
| std::vector< float > | evaluateVDriftAndReso (TString N) |
| Fit the TMax histos and evaluate VDrift and resolution. | |
| TF1 * | fitTMax (TH1F *histo) |
| Really do the fit. | |
| void | setVerbosity (unsigned int lvl) |
| Set the verbosity of the output: 0 = silent, 1 = info, 2 = debug. | |
| virtual | ~DTMeanTimerFitter () |
| Destructor. | |
Private Attributes | |
| TFile * | hDebugFile |
| TFile * | hInputFile |
| unsigned int | theVerbosityLevel |
Fit the Tmax histograms with a gaussian returning the mean values and the sigmas.
Definition at line 21 of file DTMeanTimerFitter.h.
| DTMeanTimerFitter::DTMeanTimerFitter | ( | TFile * | file | ) |
Constructor.
Definition at line 23 of file DTMeanTimerFitter.cc.
References hDebugFile.
: hInputFile(file), theVerbosityLevel(0) { //hInputFile = new TFile("DTTMaxHistos.root", "READ"); hDebugFile = new TFile("DTMeanTimerFitter.root", "RECREATE"); }
| DTMeanTimerFitter::~DTMeanTimerFitter | ( | ) | [virtual] |
Destructor.
Definition at line 28 of file DTMeanTimerFitter.cc.
References hDebugFile.
{
hDebugFile->Close();
}
| vector< float > DTMeanTimerFitter::evaluateVDriftAndReso | ( | TString | N | ) |
Fit the TMax histos and evaluate VDrift and resolution.
Definition at line 32 of file DTMeanTimerFitter.cc.
References prof2calltree::count, python::connectstrParser::f1, fitTMax(), hTMaxCell::GetT0Factor(), hDebugFile, hInputFile, mergeVDriftHistosByStation::histos, hTMaxCell::hTmax123, hTMaxCell::hTmax124s72, hTMaxCell::hTmax124s78, hTMaxCell::hTmax134s72, hTMaxCell::hTmax134s78, hTMaxCell::hTmax234, hTMaxCell::hTmax_0, hTMaxCell::hTmax_2t0, hTMaxCell::hTmax_3t0, hTMaxCell::hTmax_t0, i, timingPdfMaker::mean, and mathSSE::sqrt().
Referenced by DTVDriftCalibration::endJob().
{
// Retrieve histogram sets
hTMaxCell * histos = new hTMaxCell(N, hInputFile);
vector<float> vDriftAndReso;
// Check that the histo for this cell exists
if(histos->hTmax123 != 0) {
vector<TH1F*> hTMax; // histograms for <T_max> calculation
vector <TH1F*> hT0; // histograms for T0 evaluation
hTMax.push_back(histos->hTmax123);
hTMax.push_back(histos->hTmax124s72);
hTMax.push_back(histos->hTmax124s78);
hTMax.push_back(histos->hTmax134s72);
hTMax.push_back(histos->hTmax134s78);
hTMax.push_back(histos->hTmax234);
hT0.push_back(histos->hTmax_3t0);
hT0.push_back(histos->hTmax_2t0);
hT0.push_back(histos->hTmax_t0);
hT0.push_back(histos->hTmax_0);
vector<Double_t> factor; // factor relating the width of the Tmax distribution
// and the cell resolution
factor.push_back(sqrt(2./3.)); // hTmax123
factor.push_back(sqrt(2./7.)); // hTmax124s72
factor.push_back(sqrt(8./7.)); // hTmax124s78
factor.push_back(sqrt(2./7.)); // hTmax134s72
factor.push_back(sqrt(8./7.)); // hTmax134s78
factor.push_back(sqrt(2./3.)); // hTmax234
// Retrieve the gaussian mean and sigma for each TMax histogram
vector<Double_t> mean;
vector<Double_t> sigma;
vector<Double_t> count; //number of entries
for(vector<TH1F*>::const_iterator ith = hTMax.begin();
ith != hTMax.end(); ith++) {
TF1 *funct = fitTMax(*ith);
if(!funct){
edm::LogError("DTMeanTimerFitter") << "Error when fitting TMax..histogram name" << (*ith)->GetName();
// return empty or -1 filled vector?
vector<float> defvec(6,-1);
return defvec;
}
hDebugFile->cd();
(*ith)->Write();
// Get mean, sigma and number of entries of each histogram
mean.push_back(funct->GetParameter(1));
sigma.push_back(funct->GetParameter(2));
count.push_back((*ith)->GetEntries());
}
Double_t tMaxMean=0.;
Double_t wTMaxSum=0.;
Double_t sigmaT=0.;
Double_t wSigmaSum = 0.;
//calculate total mean and sigma
for(int i=0; i<=5; i++) {
if(count[i]<200) continue;
tMaxMean += mean[i]*(count[i]/(sigma[i]*sigma[i]));
wTMaxSum += count[i]/(sigma[i]*sigma[i]);
sigmaT += count[i]*factor[i]*sigma[i];
wSigmaSum += count[i];
// cout << "TMaxMean "<<i<<": "<< mean[i] << " entries: " << count[i]
// << " sigma: " << sigma[i]
// << " weight: " << (count[i]/(sigma[i]*sigma[i])) << endl;
}
if((!wTMaxSum)||(!wSigmaSum)){
edm::LogError("DTMeanTimerFitter") << "Error zero sum of weights..returning default";
vector<float> defvec(6,-1);
return defvec;
}
tMaxMean /= wTMaxSum;
sigmaT /= wSigmaSum;
//calculate v_drift and resolution
Double_t vDrift = 2.1 / tMaxMean; //2.1 is the half cell length in cm
Double_t reso = vDrift * sigmaT;
vDriftAndReso.push_back(vDrift);
vDriftAndReso.push_back(reso);
//if(theVerbosityLevel >= 1)
edm::LogVerbatim("DTMeanTimerFitter") << " final TMaxMean=" << tMaxMean << " sigma= " << sigmaT
<< " v_d and reso: " << vDrift << " " << reso << endl;
// Order t0 histogram by number of entries (choose histograms with higher nr. of entries)
map<Double_t,TH1F*> hEntries;
for(vector<TH1F*>::const_iterator ith = hT0.begin();
ith != hT0.end(); ith++) {
hEntries[(*ith)->GetEntries()] = (*ith);
}
// add at the end of hT0 the two hists with the higher number of entries
int counter = 0;
for(map<Double_t,TH1F*>::reverse_iterator iter = hEntries.rbegin();
iter != hEntries.rend(); iter++) {
counter++;
if (counter==1) hT0.push_back(iter->second);
else if (counter==2) {hT0.push_back(iter->second); break;}
}
// Retrieve the gaussian mean and sigma of histograms for Delta(t0) evaluation
vector<Double_t> meanT0;
vector<Double_t> sigmaT0;
vector<Double_t> countT0;
for(vector<TH1F*>::const_iterator ith = hT0.begin();
ith != hT0.end(); ith++) {
try{
(*ith)->Fit("gaus");
} catch(...){
edm::LogError("DTMeanTimerFitter") << "Exception when fitting T0..histogram " << (*ith)->GetName();
// return empty or -1 filled vector?
vector<float> defvec(6,-1);
return defvec;
}
TF1 *f1 = (*ith)->GetFunction("gaus");
// Get mean, sigma and number of entries of the histograms
meanT0.push_back(f1->GetParameter(1));
sigmaT0.push_back(f1->GetParameter(2));
countT0.push_back((*ith)->GetEntries());
}
//calculate Delta(t0)
if(hT0.size() != 6) { // check if you have all the t0 hists
edm::LogVerbatim("DTMeanTimerFitter") << "t0 histograms = " << hT0.size();
for(int i=1; i<=4;i++) {
vDriftAndReso.push_back(-1);
}
return vDriftAndReso;
}
for(int it0=0; it0<=2; it0++) {
if((countT0[it0] > 200) && (countT0[it0+1] > 200)) {
Double_t deltaT0 = meanT0[it0] - meanT0[it0+1];
vDriftAndReso.push_back(deltaT0);
}
else
vDriftAndReso.push_back(999.);
}
//deltat0 using hists with max nr. of entries
if((countT0[4] > 200) && (countT0[5] > 200)) {
Double_t t0Diff = histos->GetT0Factor(hT0[4]) - histos->GetT0Factor(hT0[5]);
Double_t deltaT0MaxEntries = (meanT0[4] - meanT0[5])/ t0Diff;
vDriftAndReso.push_back(deltaT0MaxEntries);
}
else
vDriftAndReso.push_back(999.);
}
else {
for(int i=1; i<=6; i++) {
// 0=vdrift, 1=reso, 2=(3deltat0-2deltat0), 3=(2deltat0-1deltat0),
// 4=(1deltat0-0deltat0), 5=deltat0 from hists with max entries,
vDriftAndReso.push_back(-1);
}
}
return vDriftAndReso;
}
| TF1 * DTMeanTimerFitter::fitTMax | ( | TH1F * | histo | ) |
Really do the fit.
Definition at line 196 of file DTMeanTimerFitter.cc.
References python::connectstrParser::f1, and LogDebug.
Referenced by evaluateVDriftAndReso().
{
// Find distribution peak and fit range
Double_t peak = (((((histo->GetXaxis())->GetXmax())-((histo->GetXaxis())->GetXmin()))/histo->GetNbinsX())*
(histo->GetMaximumBin()))+((histo->GetXaxis())->GetXmin());
//if(theVerbosityLevel >= 1)
LogDebug("DTMeanTimerFitter") <<"Peak "<<peak<<" : "<<"xmax "<<((histo->GetXaxis())->GetXmax())
<<" xmin "<<((histo->GetXaxis())->GetXmin())
<<" nbin "<<histo->GetNbinsX()
<<" bin with max "<<(histo->GetMaximumBin());
Double_t range = 2.*histo->GetRMS();
// Fit each Tmax histogram with a Gaussian in a restricted interval
TF1 *rGaus = new TF1("rGaus","gaus",peak-range,peak+range);
rGaus->SetMarkerSize();// just silence gcc complainining about unused var
try{
histo->Fit("rGaus","R");
} catch(...){
edm::LogError("DTMeanTimerFitter") << "Exception when fitting TMax..histogram " << histo->GetName()
<< " setting return function pointer to zero";
return 0;
}
TF1 *f1 = histo->GetFunction("rGaus");
return f1;
}
| void DTMeanTimerFitter::setVerbosity | ( | unsigned int | lvl | ) | [inline] |
Set the verbosity of the output: 0 = silent, 1 = info, 2 = debug.
Definition at line 33 of file DTMeanTimerFitter.h.
References theVerbosityLevel.
{
theVerbosityLevel = lvl;
}
TFile* DTMeanTimerFitter::hDebugFile [private] |
Definition at line 43 of file DTMeanTimerFitter.h.
Referenced by DTMeanTimerFitter(), evaluateVDriftAndReso(), and ~DTMeanTimerFitter().
TFile* DTMeanTimerFitter::hInputFile [private] |
Definition at line 44 of file DTMeanTimerFitter.h.
Referenced by evaluateVDriftAndReso().
unsigned int DTMeanTimerFitter::theVerbosityLevel [private] |
Definition at line 46 of file DTMeanTimerFitter.h.
Referenced by setVerbosity().
1.7.3