{ //TCanvas *c = new TCanvas("c","Basic 1",200,10,700,900); //c->SetFillColor(18); //c->SetGridx(); //c->SetGridy(); Int_t n=6; Float_t x[6],y[6]; x[0]=0; x[1]=20; x[2]=40; x[3]=60; x[4]=80; x[5]=100; y[0]=11; y[1]=14; y[2]=20; y[3]=25; y[4]=29; y[5]=34; TGraph *gr = new TGraph(n,x,y); gr->SetTitle("Lower Mass Meson System"); TAxis *ax; gr->SetMarkerStyle(21); gr->Draw("APC"); }