Hi, i have a little problem with TGraph.
How can i put a title to an axis?
I try with ...->GetXaxis()->SetTitle("..") but i obtain
Error: illegal pointer to class object GetXaxis() 0x0 122.
TGraph *mltplct_gr1 = new TGraph(12, Zv, z1);
mltplct_gr1->SetLineColor(2);
mltplct_gr1->SetLineWidth(2);
mltplct_gr1->SetMarkerColor(4);
mltplct_gr1->SetMarkerStyle(21);
mltplct_gr1->GetXaxis()->SetTitle("Zv");
mltplct_gr1->SetTitle("Moltiplicity versus primary vertex position\n");
mltplct_gr1->Draw("ACP");
Best regards, Giuseppe Lo Re.
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