void grlabels()
{
	const char * mnames[12] = {"January", "February", "March", "April", "May", "June",
        "July", "August", "September", "October", "November", "December"};
        
   TGraph * months = new TGraph(12);
   Double_t x = 5;
   Double_t y = 20;
    
   for (Int_t i=0; i<12; i++) {
		months->SetPoint(i,x,y);
		x += 5;
		y -= 2;
	}
	gStyle->SetMarkerStyle(0);
	gStyle->SetMarkerColor(1);
	gStyle->SetLineColor(0);
	months->Draw("AP");
	TLatex lat;
	Double_t *xp = months->GetX();
	Double_t *yp = months->GetY();
	
	lat.SetTextAngle(45.);
	for (Int_t i=0; i<12; i++) {
		lat.DrawLatex(xp[i] - 4, yp[i], mnames[i]);
	}
	months->GetHistogram()->SetMaximum(30);
}