data analysis scripts
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#include "TFile.h"
#include "TTree.h"
#include "TH2.h"
#include "TF1.h"
void offsetcor(string rootfilename, string outfilename)
{
ofstream outfile(outfilename.c_str(), ofstream::out);
TFile *rootFile = new TFile(rootfilename.c_str(),"OPEN");
TTree* tree;
rootFile->GetObject("t",tree);
tree->Print();
TFile *newrootFile = new TFile("offsetcor.root","RECREATE");
TH2D* th2_beamSignal_b0_ic1[30];
TH2D* th2_beamSignal_b1_ic1[30];
TH2D* th2_beamSignal_b2_ic1[30];
TH2D* th2_beamSignal_b3_ic1[30];
TProfile * prof_beamSignal_b0_ic1[30];
TProfile * prof_beamSignal_b1_ic1[30];
TProfile * prof_beamSignal_b2_ic1[30];
TProfile * prof_beamSignal_b3_ic1[30];
char histname[30] = "";
char fitname[30] = "";
TCanvas* c1;
TF1 * fit_beamSignal_b0_ic1[30];
TF1 * fit_beamSignal_b1_ic1[30];
TF1 * fit_beamSignal_b2_ic1[30];
TF1 * fit_beamSignal_b3_ic1[30];
for (int iii=0; iii<=29; iii++){
///b0
sprintf(histname,"th2_beamSignal_b0_ic1_%d",iii);
sprintf(fitname,"fit_beamSignal_b0_ic1_%d",iii);
th2_beamSignal_b0_ic1[iii] = new TH2D(histname,histname,100,0,500,100,0,50000);
tree->Project(histname,"beamSignal_b0:ic1_avg",Form("energy_index==%i",1+iii*10),"coloz");
prof_beamSignal_b0_ic1[iii] = th2_beamSignal_b0_ic1[iii]->ProfileX();
fit_beamSignal_b0_ic1[iii] = new TF1(fitname,"pol1",10,150);
prof_beamSignal_b0_ic1[iii]->Fit(fit_beamSignal_b0_ic1[iii],"R");
///b1
sprintf(histname,"th2_beamSignal_b1_ic1_%d",iii);
sprintf(fitname,"fit_beamSignal_b1_ic1_%d",iii);
th2_beamSignal_b1_ic1[iii] = new TH2D(histname,histname,100,0,500,100,0,50000);
tree->Project(histname,"beamSignal_b1:ic1_avg",Form("energy_index==%i",1+iii*10),"coloz");
prof_beamSignal_b1_ic1[iii] = th2_beamSignal_b1_ic1[iii]->ProfileX();
fit_beamSignal_b1_ic1[iii] = new TF1(fitname,"pol1",10,150);
prof_beamSignal_b1_ic1[iii]->Fit(fit_beamSignal_b1_ic1[iii],"R");
///b2
sprintf(histname,"th2_beamSignal_b2_ic1_%d",iii);
sprintf(fitname,"fit_beamSignal_b2_ic1_%d",iii);
th2_beamSignal_b2_ic1[iii] = new TH2D(histname,histname,100,0,500,100,0,50000);
tree->Project(histname,"beamSignal_b2:ic1_avg",Form("energy_index==%i",1+iii*10),"coloz");
prof_beamSignal_b2_ic1[iii] = th2_beamSignal_b2_ic1[iii]->ProfileX();
fit_beamSignal_b2_ic1[iii] = new TF1(fitname,"pol1",10,150);
prof_beamSignal_b2_ic1[iii]->Fit(fit_beamSignal_b2_ic1[iii],"R");
///b3
sprintf(histname,"th2_beamSignal_b3_ic1_%d",iii);
sprintf(fitname,"fit_beamSignal_b3_ic1_%d",iii);
th2_beamSignal_b3_ic1[iii] = new TH2D(histname,histname,100,0,500,100,0,50000);
tree->Project(histname,"beamSignal_b3:ic1_avg",Form("energy_index==%i",1+iii*10),"coloz");
prof_beamSignal_b3_ic1[iii] = th2_beamSignal_b3_ic1[iii]->ProfileX();
fit_beamSignal_b3_ic1[iii] = new TF1(fitname,"pol1",10,150);
prof_beamSignal_b3_ic1[iii]->Fit(fit_beamSignal_b3_ic1[iii],"R");
outfile << fit_beamSignal_b0_ic1[iii]->GetParameter(0) << " " << fit_beamSignal_b1_ic1[iii]->GetParameter(0) << " " << fit_beamSignal_b2_ic1[iii]->GetParameter(0) << " " << fit_beamSignal_b3_ic1[iii]->GetParameter(0) << std::endl;
}
newrootFile->Write();
newrootFile->Close();
outfile.close();
rootFile->Close();
}