Drawing Options for 1D Histograms

{
   //
   // To see the output of this macro, click  here 
   //
   gROOT->Reset();
   c1 = new TCanvas("c1","Histogram Drawing Options",200,10,700,900);

   pad1 = new TPad("pad1","The pad with the function",0.03,0.62,0.50,0.92,21);
   pad2 = new TPad("pad2","The pad with the histogram",0.51,0.62,0.98,0.92,21);
   pad3 = new TPad("pad3","The pad with the histogram",0.03,0.02,0.97,0.57,21);
   pad1->Draw();
   pad2->Draw();
   pad3->Draw();
   //
   // We connect the ROOT file generated in a previous tutorial
   // see  An example creating/filling/saving histograms/ntuples on file 
   //
   TFile example("hsimple.root");
   example.ls();

   // Draw a global picture title
   title = new TPaveLabel(0.1,0.94,0.9,0.98,
                    "Drawing options for one dimensional histograms");
   title->SetFillColor(16);
   title->Draw();
   //
   // Draw histogram hpx in first pad with the default option.
   pad1->cd();
   pad1->GetFrame()->SetFillColor(18);
   hpx->SetFillColor(45);
   hpx->DrawCopy();
   label1 = new TPaveLabel(-3.5,700,-1,800,"Default option");
   label1->SetFillColor(42);
   label1->Draw();
   //
   // Draw hpx as a lego. Clicking on the lego area will show
   // a "transparent cube" to guide you rotating the lego in real time.
   pad2->cd();
   hpx->DrawCopy("lego1");
   label2 = new TPaveLabel(0.4,0.8,0.9,0.95,"option Lego1");
   label2->SetFillColor(42);
   label2->Draw();
   label2a = new TPaveLabel(-0.93,-1.08,0.25,-0.92,"Click on lego to rotate");
   label2a->SetFillColor(42);
   label2a->Draw();
   //
   // Draw hpx with its errors and a marker.
   pad3->cd();
   pad3->SetGridx();
   pad3->SetGridy();
   pad3->GetFrame()->SetFillColor(18);
   hpx->SetMarkerStyle(21);
   hpx->Draw("e1p");
   label3 = new TPaveLabel(2,600,3.5,650,"option e1p");
   label3->SetFillColor(42);
   label3->Draw();
   //
   // The following illustrates how to add comments using a PaveText.
   // Attributes of text/lines/boxes added to a PaveText can be modified.
   // The AddText function returns a pointer to the added object.
   pave = new TPaveText(-3.78,500,-1.5,750);
   pave->SetFillColor(42);
   TText *t1=pave->AddText("You can move");
   t1->SetTextColor(4);
   t1->SetTextSize(0.05);
   pave->AddText("Title and Stats pads");
   pave->AddText("X and Y axis");
   pave->AddText("You can modify bin contents");
   pave->Draw();
   c1->Update();
}