Commit 326c4040 authored by Keerthi Nakkalil's avatar Keerthi Nakkalil
Browse files

Timewalk plots are made and fitted for one pixel

parent d4b05e7a
void timewalkfit(TGraphErrors* graph){
auto fitmin = TMath::MinElement(graph->GetN(),graph->GetX());
// std::cout << "fitmin" << fitmin << std::endl;
auto fitmax = TMath::MaxElement(graph->GetN(),graph->GetX());
// std::cout << "fitmax " << fitmax << std::endl;
TF1 *fitfuncTOA = new TF1("fitfuncTOA","(([2]/(x-[0]))+ [1])",fitmin,fitmax);
fitfuncTOA->SetParNames("asymtote","offset","curvature");
int iymax=TMath::LocMax(graph->GetN(),graph->GetY());
// cout << "iymax " << iymax << std::endl;
auto ttoa = graph->GetPointX(iymax);
// cout << "ttoa" << " " << ttoa << std::endl;;
fitfuncTOA->SetParameter(0,ttoa);
auto xmax = TMath::MaxElement(graph->GetN(),graph->GetX());
auto dtoa = graph->Eval(xmax);
// cout << "dtoa" << " " << dtoa <<std::endl;
fitfuncTOA->SetParameter(1,dtoa);
auto testx = 0.5*fitmax;
auto ctoa_y = graph->Eval(testx);
auto ctoa = (ctoa_y - dtoa)*(testx - ttoa);
// cout << "ctoa" << " " << ctoa <<std::endl;
fitfuncTOA->SetParameter(2,ctoa);
gStyle->SetOptFit(1111);
fitfuncTOA->SetLineColor(kRed);
graph->Fit(fitfuncTOA,"R");
graph->GetXaxis()->SetTitle("Volatge[mV]");
graph->GetYaxis()->SetTitle ("time difference[ns]");
graph->SetTitle(" ");
graph->SetMarkerStyle(7);
graph->Draw("AP");
}
void TreeEnergyWrite(){
int Ecol1;
double Ecol2,Ecol3,Ecol4;
string line_E;
TFile* Efile = new TFile("Energy_table.root","recreate");
TTree* ETree = new TTree("ETree","Energy tree");
ETree->Branch("Ecol1",&Ecol1,"Ecol1/I"); // ECol1 = Energy values = {200,300.....14000}
ETree->Branch("Ecol4",&Ecol4,"Ecol4/D"); // Voltage values
std::ifstream Energy_file("Energy_table.dat");
if(Energy_file.is_open()){
while(getline(Energy_file,line_E)){
istringstream ssE(line_E);
ssE >> Ecol1 >> Ecol2 >> Ecol3 >> Ecol4;
ETree->Fill();
}
}
ETree->Write();
Efile->Close();
}
void TreeTPWrite(){
int energy, col, row, pc;
double voltage,tot, tot_var, toa, toa_var, time_ref,toa_cut,mean,RMS;
string line_TP;
TFile* Efile = new TFile("Energy_table.root");
TTree* ETree = (TTree*)Efile->Get("ETree");
ETree->SetBranchAddress("Ecol1",&energy);
ETree->SetBranchAddress("Ecol4",&voltage);
TFile* TPfile = new TFile("TP.root","update");
TTree* TPtree = new TTree("TPtree"," TP tree");
TPtree->Branch("col",&col,"col/I");
TPtree->Branch("row",&row,"row/I");
TPtree->Branch("pc",&pc,"pc/I");
TPtree->Branch("tot",&tot,"tot/D");
TPtree->Branch("tot_var",&tot_var,"tot_var/D");
TPtree->Branch("toa",&toa,"toa/D");
TPtree->Branch("toa_var",&toa_var,"toa_var/D");
TPtree->Branch("time_ref",&time_ref,"time_ref/D");
auto voltageBranch = TPtree->Branch("voltage",&voltage,"voltage/D");// make a new branch and connect it to the same variable as the branch address of the energy tree
auto Branch_toacut = TPtree->Branch("toa_cut",&toa_cut,"toa_cut/D");
for(int i = 0; i < ETree->GetEntries(); i++){
ETree->GetEntry(i);
// std:: cout << energy << " " << voltage << std::endl;
std::string TPfilename = "tp_dat_" + std::to_string(energy) + ".dat";
//std:: cout << " The TPfilenames are : " << TPfilename.c_str() <<std::endl;
std::ifstream TPdatafile(TPfilename.c_str());
voltageBranch->Fill();
if(TPdatafile.is_open()){
std::cout << " The data file " << TPfilename.c_str() << " is opened ..." <<std::endl;
// reading through individial tp_dat_ files
while(getline(TPdatafile,line_TP)){
if(line_TP.rfind("#", 0) == 0) {
continue;
}
istringstream ssTP(line_TP);
ssTP >> col >> row >> pc >> tot >> tot_var >> toa >> toa_var >> time_ref;
TPtree->Fill();
} //While loop getline
}//if statement TPdatafile open
TPtree->Draw("toa",Form("voltage==(%f)",voltage),"goff");
mean = TMath::Mean(TPtree->GetSelectedRows(), TPtree->GetV1());
RMS = TMath::RMS(TPtree->GetSelectedRows(), TPtree->GetV1());
// std::cout <<" mean " << mean << " RMS " << RMS <<std::endl;
/* for (int isigma=0; isigma < 15; isigma++){
std::cout << " cut at " << isigma << " times the RMS leaves : "
<< 100.0*TPtree->GetEntries(Form("toa<(%f) && voltage==(%f)",mean+isigma*RMS,voltage))/TPtree->GetEntries(Form("voltage==(%f)",voltage))
<< " percentage of entries " << std::endl;
}*/
toa_cut = mean + 6*RMS;
Branch_toacut->Fill();
}//For loop GetEntries
//Save only the new version of the tree
TPtree->Write("",TObject::kOverwrite);
long N = TPtree->Draw("voltage:toa:sqrt(toa_var) ", "row==1 && col==10 && toa>0", "goff");
TGraphErrors *gr = new TGraphErrors(N,TPtree->GetV1(),TPtree->GetV2(),0,TPtree->GetV3());
timewalkfit(gr);
TPfile->Close();
}
void onepixel_tree(){
TreeEnergyWrite();
TreeTPWrite();
}
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