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tutorials
tree
staff.C
Go to the documentation of this file.
1
/// \file
2
/// \ingroup tutorial_tree
3
/// \notebook -nodraw
4
/// Create a plot of the data in `cernstaff.root`
5
/// To create `cernstaff.root`, execute tutorial `$ROOTSYS/tutorials/tree/cernbuild.C`
6
///
7
/// \macro_image
8
/// \macro_code
9
///
10
/// \author Rene Brun
11
12
void
staff
() {
13
auto
f =
TFile::Open
(
"cernstaff.root"
);
14
TTree
*
T
=
nullptr
;
15
f->GetObject(
"T"
,T);
16
T->
Draw
(
"Grade:Age:Cost:Division:Nation"
,
""
,
"gl5d"
);
17
if
(
gPad
)
gPad
->Print(
"staff.C.png"
);
18
}
ROOT::Math::Chebyshev::T
double T(double x)
Definition:
ChebyshevPol.h:34
TFile::Open
static TFile * Open(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=1, Int_t netopt=0)
Create / open a file.
Definition:
TFile.cxx:3950
staff
Definition:
staff.py:1
TTree::Draw
virtual void Draw(Option_t *opt)
Default Draw method for all objects.
Definition:
TTree.h:355
gPad
#define gPad
Definition:
TVirtualPad.h:285
TTree
A TTree object has a header with a name and a title.
Definition:
TTree.h:70