{
TH2D * h = new TH2D("h", "h", 30, -3, 3, 10000, 0, 1);
h->FillRandom("gaus");
h->Draw();
TAxis * x = h->GetXaxis();
cout << "There are " << x->GetNbins()  << " bins." << endl;
TArrayD * array = x->GetXbins();
cout << "There are " << array->GetSize()  << " bins." << endl;
}