main0.cc

The method DAQFile::operator>> is used to fill at each event the instance of DAQEvent. In the while the object event is updated everytime with the new event read from the file. The the proper channel is chosen with DAQEvent::GetChannel() and in cascade is used DAQEvent::GetPedestal() that returns an std::pair<float, float>, the two values are the mean and the standard deviation of the pedestal, these values are used to fill two distinct histograms using ROOT.

 
#include "../readWD.hh"
 
#include "TApplication.h"
#include "TH1F.h"
 
using namespace std;
 
void main0()
{
    DAQFile file("../data/testDRS.dat");
    DRSEvent event;
 
    TH1F *h1 = new TH1F("Pedestal mean", "h1", 100, -0.002, 0.004);
    TH1F *h2 = new TH1F("Pedestal std.dev.", "h2", 100, -0.002, 0.004);
 
    h1->SetLineColor(kRed);
    h2->SetLineColor(kGreen);
 
    while (file >> event)
    {
        auto pedestal = event.GetChannel(0, 0).GetPedestal();
        h1->Fill(pedestal.first);
        h2->Fill(pedestal.second);
    }
 
    h2->Draw();
    h1->Draw("SAMES");
}
 
int main(int argc, char **argv)
{
    TApplication app("ROOT Application", &argc, argv);
    main0();
    app.Run();
    return 0;
}