Create a plot of the data in cernstaff.root To create cernstaff.root, execute tutorial $ROOTSYS/tutorials/tree/cernbuild.C 
  
   T->
Draw(
"Grade:Age:Cost:Division:Nation",
"",
"gl5d");
 
}
static TFile * Open(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0)
Create / open a file.
 
A TTree represents a columnar dataset.
 
void Draw(Option_t *opt) override
Default Draw method for all objects.
 
- Author
 - Rene Brun 
 
Definition in file staff.C.