void testMe(){
  gROOT->Reset();
  gROOT->SetStyle("Plain");
  gStyle->SetOptStat(0);


  TFile *hFile = new TFile("./hOut.root");
  TH1D *h2; hFile->GetObject("h2",h2);
  TH1D *h3; hFile->GetObject("h3",h3);
  
  TH1D *hDiv = (TH1D *)h2->Clone("hDiv");
  TH1D *hSubtract = (TH1D *)h2->Clone("hSubtract");
  TH1D *hSubtractV2 = (TH1D *)h2->Clone("hSubtractV2");

  double scaleFactorh2 = 1;
  double scaleFactorh3 = 0.37903;
  hDiv->Divide(h2,h3,scaleFactorh2,scaleFactorh3);

  hSubtract->Add(h2,h3,scaleFactorh2,-scaleFactorh3);
  hSubtractV2->Add(h2,h3); // No scale factors (actually adds!)

  //hDiv->Draw();
  //hSubtract->Draw();
  //hSubtractV2->Draw();

  h2->SetLineColor(2);
  h3->SetLineColor(4);
  h3->Draw();
  h2->Draw("same");
}