void SetAxisLabels(TH1& hist, char* xtitle, char* ytitle="",
double xoffset=1.1, double yoffset=1.4) {
TAxis* x = hist.GetXaxis();
TAxis* y = hist.GetYaxis();
x->SetTitle(xtitle);
x->SetTitleSize(0.06);
x->SetLabelSize(0.05);
x->SetTitleOffset(xoffset);
x->SetNdivisions(505);
y->SetTitle(ytitle);
y->SetTitleSize(0.06);
y->SetLabelSize(0.05);
y->SetTitleOffset(yoffset);
y->SetNoExponent();
hist.SetLineWidth(2);
hist.SetMarkerStyle(20);
std::stringstream str;
str << "Events / " << (int) lumi << " pb^{-1} ";
std::string defYtitle = str.str();
if(ytitle=="") y->SetTitle( defYtitle.c_str() );
}
