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/**
* This macro can run on the output root file from SyncO2O and produce
* a histogram showing the digis, digis with masking and number of
* detIds with HV off. <br>
* The digis with masking should remain always at a stable level during
* a run and go to zero when the tracker HV is off. <br>
* In contrast the digis will go up when the HV is being turned off. <br>
* The increase in modules with HV off (provided a sufficient reduction
* is used) will be a straigth line going up and will begin when the
* off command is given to the modules from DCS.
*/
{
TFile * inputFile = new TFile("digisAndHVvsTime.root", "read");
TH1F * HVoff = (TH1F*)inputFile->Get("HVoff");
TH1F * digisWithMasking = (TH1F*)inputFile->Get("digisWithMasking");
TH1F * digis = (TH1F*)inputFile->Get("digis");
TCanvas * canvas = new TCanvas("digiHVcomp", "digis vs HV off comparison", 1000, 800);
canvas->Draw();
digis->Draw();
digisWithMasking->Draw("same");
digisWithMasking->SetLineColor(kBlue);
HVoff->Draw("same");
HVoff->Scale(100);
HVoff->SetLineColor(kRed);
TLegend * legend = new TLegend(0.1, 0.7, 0.48, 0.9);
legend->SetHeader("digis vs HV off comparison");
legend->AddEntry(digis, "all digis");
legend->AddEntry(digisWithMasking, "digis with HV off masking");
legend->AddEntry(HVoff, "number of detId with HV off");
legend->Draw("same");
}
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