void DeltaG()
{
  gROOT->SetStyle("Plain");
  TCanvas* c1 = new TCanvas("c1","Latex",500,250);
  TLatex latex;
  latex.SetTextSize(0.1);
  latex.DrawLatex(0.025,0.5,"#DeltaG(x_{g}) = #frac{N_{++}(x_{g})-N_{+-}(x_{g})}{P_{B}P_{Y}#sum_{i=1}^{N_{++}+N_{+-}}A_{1}^{p}(x_{qi},Q_{i}^{2})#hat{a}_{LL}(cos#theta_{i}^{*})/G(x_{gi},Q_{i}^{2})}");
  c1->Print("DeltaG.png");
  c1->Print("DeltaG.eps");
}