void mean_mip_histogram ()
{
  /*
  Files used for histogram:
  mipfile0.gains = Run12_200mip
  mipfile1.gains = Run12_500mip
  mipfile2.gains = Run13P1mip
  mipfile3.gains = Run13P2mip
  mipfile4.gains = Run15mip
  mipfile5.gains = Run17mip
*/

  TTree t0;
  t0.ReadFile("mip_w_RMS.gains","cell:a:x:y");
  t0.Draw("y:a>>h0");
  TH2F *h0 = (TH2F*) gROOT->FindObject("h0");
  h0->GetXaxis()->SetRangeUser(0,30);
  h0->GetYaxis()->SetRangeUser(0,2);
  //h0->GetXaxis()->SetTitle("Mean Values");
  //h0->SetTitle("MIP Mean Values");


  /*TTree t1;
  t1.ReadFile("mipfile1.gains","cell:mean:x:y");
  t1.Draw("y<1:mean>>h1");
  TH2F *h1 = (TH2F*) gROOT->FindObject("h1");
  h1->GetXaxis()->SetRangeUser(10,30);
  h1->GetYaxis()->SetRangeUser(0,6);
  h1->SetFillColor(2);


  TTree t2;
  t2.ReadFile("mipfile2.gains","cell:mean:x:y");
  t2.Draw("(y*2):mean>>h2");
  TH2F *h2 = (TH2F*) gROOT->FindObject("h2");
  h2->GetXaxis()->SetRangeUser(10,30);
  h2->GetYaxis()->SetRangeUser(0,6);
  h2->SetFillColor(3);


  TTree t3;
  t3.ReadFile("mipfile3.gains","cell:mean:x:y");
  t3.Draw("(y*2):mean>>h3");
  TH2F *h3 = (TH2F*) gROOT->FindObject("h3");
  h3->GetXaxis()->SetRangeUser(10,30);
  h3->GetYaxis()->SetRangeUser(0,6);
  h3->SetFillColor(4);

  TTree t4;
  t4.ReadFile("mipfile4.gains","cell:mean:x:y");
  t4.Draw("(y*3):mean>>h4");
  TH2F *h4 = (TH2F*) gROOT->FindObject("h4");
  h4->GetXaxis()->SetRangeUser(10,30);
  h4->GetYaxis()->SetRangeUser(0,6);
  h4->SetFillColor(5);


  TTree t5;
  t5.ReadFile("mipfile5.gains","cell:mean:x:y");
  t5.Draw("(y*5):mean>>h5");
  TH2F *h5 = (TH2F*) gROOT->FindObject("h5");
  h5->GetXaxis()->SetRangeUser(10,30);
  h5->GetYaxis()->SetRangeUser(0,6);
  h5->SetFillColor(6);*/


  TCanvas * c1 = new TCanvas("c1","c1",800,800);
  //gPad->SetLogy();
  h0->Draw("CANDLEY6");
  /*h1->Draw("CANDLEY6 SAME");
  h2->Draw("CANDLEY6 SAME");
  h3->Draw("CANDLEY6 SAME");
  h4->Draw("CANDLEY6 SAME");
  h5->Draw("CANDLEY6 SAME");

  TLegend * l = new TLegend(0.78,0.695,0.980,0.935);
  l->AddEntry(h0,"Run12_200mip","f");
  l->AddEntry(h1,"Run12_500mip","f");
  l->AddEntry(h2,"Run13P1mip","f");
  l->AddEntry(h3,"Run13P2mip","f");
  l->AddEntry(h4,"Run15mip","f");
  l->AddEntry(h5,"Run17mip","f");
  l->Draw();*/
}