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comp_gtrk_e.C
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comp_gtrk_e.C
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#define hcana_class_cxx
#define engine_class_cxx
#include <TTree.h>
#include <TFile.h>
#include <TROOT.h>
#include <iostream>
#include <TMath.h>
#include <TLegend.h>
#include "hcana_class.h"
#include "engine_class.h"
using namespace std;
void comp_gtrk_e() {
// Compare energies of the golden track from hcana and the best
// track from Engine.
// hcana tree
hcana_class* hcana_tree = new hcana_class(0);
Long64_t hcana_nentries = hcana_tree->fChain->GetEntriesFast();
cout << "hcana_nentries = " << hcana_nentries << endl;
// Engine tree
engine_class* engine_tree = new engine_class(0);
Long64_t engine_nentries = engine_tree->fChain->GetEntriesFast();
cout << "engine_nentries = " << engine_nentries << endl;
// Histograms.
TH1F* he_hcana = new TH1F("e_hcana", "Golden track Ecalo",
100, 0.011, 1.8);
he_hcana->SetLineColor(kRed);
TH1F* he_engine = (TH1F*) he_hcana->Clone("e_engine");
he_engine->SetLineColor(kBlue);
TH1F* ee_diff = new TH1F("ee_diff",
"Event by event hcana - Engine Ecalo difference", 200,-1.,1.);
TH1F* pp_diff = new TH1F("pp_diff","Event by event P difference",
200,-1.,1.);
TH2F* pvse_diff = new TH2F("pvse_diff","Event by event P vs Ecalo difference",
200,-1.,1., 200,-100.,100.);
pvse_diff->SetMarkerStyle(3);
TH2F* evse = new TH2F("evse","Event by event hcana vs Engine Ecalo",
210,-0.1,2., 210,-0.1,2.);
evse->SetMarkerStyle(3);
// Loop over entries.
Long64_t nentries = TMath::Min(hcana_nentries, engine_nentries);
cout << "nentries = " << nentries << endl;
Long64_t jentry_hcana = 0;
Long64_t jentry_engine = 0;
for (Long64_t jentry=0; jentry<nentries; jentry++) {
hcana_tree->fChain->GetEntry(jentry_hcana++);
engine_tree->fChain->GetEntry(jentry_engine++);
while (hcana_tree->fEvtHdr_fEvtNum > engine_tree->eventid &&
jentry_engine < engine_nentries) {
engine_tree->fChain->GetEntry(jentry_engine++);
//cout<< hcana_tree->fEvtHdr_fEvtNum << " " << engine_tree->eventid << endl;
}
while (hcana_tree->fEvtHdr_fEvtNum < engine_tree->eventid &&
jentry_hcana < hcana_nentries) {
hcana_tree->fChain->GetEntry(jentry_hcana++);
//cout<< hcana_tree->fEvtHdr_fEvtNum << " " << engine_tree->eventid << endl;
}
if (hcana_tree->fEvtHdr_fEvtType==1 && engine_tree->ev_type==1
&& hcana_tree->H_gold_index>-1 && engine_tree->hstrk_in>0
&& hcana_tree->H_gold_index == engine_tree->hstrk_in - 1) {
he_hcana->Fill(hcana_tree->H_gold_e, 1.);
//cout << hcana_tree->H_gold_e << " " << hcana_tree->g_evtyp << " "
// << hcana_tree->fEvtHdr_fEvtType << endl;
he_engine->Fill(engine_tree->hstrk_et, 1.);
// cout << engine_tree->hsshtrk << " " << engine_tree->ev_type << " "
// << engine_tree->eventid << endl;
ee_diff->Fill(hcana_tree->H_gold_e - engine_tree->hstrk_et, 1.);
pp_diff->Fill(hcana_tree->H_gold_p - engine_tree->hsp, 1.);
pvse_diff->Fill(hcana_tree->H_gold_e - engine_tree->hstrk_et,
hcana_tree->H_gold_p - engine_tree->hsp, 1.);
evse->Fill(engine_tree->hstrk_et, hcana_tree->H_gold_e, 1.);
//Debug print out.
if (TMath::Abs(engine_tree->hstrk_et - hcana_tree->H_gold_e) > 0.05 ) {
cout << "===========================================================\n";
cout << "Engine event " << engine_tree->eventid
<< ": hstrk_et = " << engine_tree->hstrk_et
<< ", hstrk_index = " << engine_tree->hstrk_in
<< ", hntracks = " << engine_tree->hntracks << endl;
cout << " hsxfp = " << engine_tree->hsxfp
<< ", hsyfp = " << engine_tree->hsyfp << endl;
cout << " hsxpfp= " << engine_tree->hsxpfp
<< ", hsypfp= " << engine_tree->hsypfp << endl;
cout << " hsp = " << engine_tree->hsp << endl;
cout << " At calorimeter:"
<< " x = " << engine_tree->hsxfp+338.69*engine_tree->hsxpfp
<< " y = " << engine_tree->hsyfp+338.69*engine_tree->hsypfp
<< endl;
cout << "-----------------------------------------------------------\n";
cout << "hcana event " << hcana_tree->fEvtHdr_fEvtNum
<< ": H_gold_e = " << hcana_tree->H_gold_e
<< " H_gold_index = " << hcana_tree->H_gold_index
<< " H_tr_n = " << hcana_tree->H_tr_n << endl;
cout << " H_gold_fp_x = " << hcana_tree->H_gold_fp_x
<< " H_gold_fp_y = " << hcana_tree->H_gold_fp_y << endl;
cout << " H_gold_fp_th= " << hcana_tree->H_gold_fp_th
<< " H_gold_fp_ph= " << hcana_tree->H_gold_fp_ph << endl;
cout << " H_gold_p = " << hcana_tree->H_gold_p << endl;
cout << " At calorimeter:"
<< " x = " << hcana_tree->H_gold_fp_x+338.69*hcana_tree->H_gold_fp_th
<< " y = " << hcana_tree->H_gold_fp_y+338.69*hcana_tree->H_gold_fp_ph
<< endl;
}
}
} //over entries
// Plot.
TCanvas* c1 = new TCanvas("c1","Golden Track E from hcana",600,750);
c1->Divide(1,2);
c1->cd(1);
he_hcana->Draw();
he_engine->Draw("same");
TLegend* leg = new TLegend(0.25, 0.70, 0.40, 0.82);
leg->AddEntry(he_hcana,"hcana","l");
leg->AddEntry(he_engine,"Engine","l");
leg->Draw();
// Difference between the histograms.
c1->cd(2);
TH1F* dif = he_hcana->Clone("difference");
dif->Reset();
dif->Add(he_hcana,he_engine,1.,-1.);
dif->SetTitle("hcana -- Engine difference");
dif->SetFillColor(kRed);
dif->SetLineColor(kRed);
dif->SetLineWidth(1);
dif->SetFillStyle(1111);
dif->Draw();
TCanvas* c2 = new TCanvas("c2","Event by event hcana - Engine Ecalo diff.",
600,750);
c2->Divide(1,2);
c2->cd(1);
gPad->SetLogy();
ee_diff->Draw();
c2->cd(2);
evse->Draw();
}