void ArCu6()
{

TGraph *Ar = new TGraph("Ar6.txt");
Ar->SetLineColor(kBlue);


TGraph *Cu = new TGraph("Cu6.txt");

Cu->SetLineColor(kRed);

TMultiGraph *Mg = new TMultiGraph();
Mg->Add(Ar);
Mg->Add(Cu);

Mg->GetXaxis()->SetTitle("#theta_{Lab} (deg)");
Mg->GetYaxis()->SetTitle("Energy (MeV/u)");
Mg->GetXaxis()->CenterTitle();
Mg->GetYaxis()->CenterTitle();

/*
TLegend *lg = new TLegend (5,5,9,9);
lg->AddEntry("Ar","40^{Ar}","l");
lg->AddEntry("Cu","59^{Cu}","l");
*/


Mg->GetXaxis()->SetRangeUser(0,2);
Mg->Draw("AC");
}