ROOT
master
Reference Guide
Loading...
Searching...
No Matches
ntuple1.py
Go to the documentation of this file.
1
## \file
2
## \ingroup tutorial_pyroot
3
## \notebook
4
## Ntuple drawing example.
5
##
6
## \macro_code
7
##
8
## \author Wim Lavrijsen
9
10
from
ROOT
import
TCanvas, TPad, TFile, TPaveText
11
from
ROOT
import
gBenchmark, gStyle, gROOT
12
13
c1 =
TCanvas
(
'c1'
,
'The Ntuple canvas'
,200,10,700,780)
14
15
gBenchmark.Start(
'ntuple1'
)
16
17
#
18
# Connect ROOT histogram/ntuple demonstration file
19
# generated by example hsimple.C.
20
f1 =
TFile
(
'py-hsimple.root'
)
21
22
#
23
# Inside this canvas, we create 4 pads
24
pad1 =
TPad
(
'pad1'
,
'This is pad1'
,0.02,0.52,0.48,0.98,21)
25
pad2 =
TPad
(
'pad2'
,
'This is pad2'
,0.52,0.52,0.98,0.98,21)
26
pad3 =
TPad
(
'pad3'
,
'This is pad3'
,0.02,0.02,0.48,0.48,21)
27
pad4 =
TPad
(
'pad4'
,
'This is pad4'
,0.52,0.02,0.98,0.48,1)
28
pad1.Draw()
29
pad2.Draw()
30
pad3.Draw()
31
pad4.Draw()
32
33
#
34
# Change default style for the statistics box
35
gStyle.SetStatW(0.30)
36
gStyle.SetStatH(0.20)
37
gStyle.SetStatColor(42)
38
39
#
40
# Display a function of one ntuple column imposing a condition
41
# on another column.
42
pad1.cd()
43
pad1.SetGrid()
44
pad1.SetLogy()
45
pad1.GetFrame().
SetFillColor
(15)
46
ntuple = gROOT.FindObject(
'ntuple'
)
47
ntuple.SetLineColor(1)
48
ntuple.SetFillStyle(1001)
49
ntuple.SetFillColor(45)
50
ntuple.Draw(
'3*px+2'
,
'px**2+py**2>1'
)
51
ntuple.SetFillColor(38)
52
ntuple.Draw(
'2*px+2'
,
'pz>2'
,
'same'
)
53
ntuple.SetFillColor(5)
54
ntuple.Draw(
'1.3*px+2'
,
'(px^2+py^2>4) && py>0'
,
'same'
)
55
c1.Update()
56
57
#
58
# Display the profile of two columns
59
# The profile histogram produced is saved in the current directory with
60
# the name hprofs
61
pad2.cd()
62
pad2.SetGrid()
63
pad2.GetFrame().
SetFillColor
(32)
64
ntuple.Draw(
'pz:px>>hprofs'
,
''
,
'goffprofs'
)
65
hprofs = gROOT.FindObject(
'hprofs'
)
66
hprofs.SetMarkerColor(5)
67
hprofs.SetMarkerSize(0.7)
68
hprofs.SetMarkerStyle(21)
69
hprofs.Fit(
'pol2'
)
70
71
#
72
# Get pointer to fitted function and modify its attributes
73
fpol2 = hprofs.GetFunction(
'pol2'
)
74
fpol2.SetLineWidth(4)
75
fpol2.SetLineColor(2)
76
c1.Update()
77
78
#
79
# Display a scatter plot of two columns with a selection.
80
# Superimpose the result of another cut with a different marker color
81
pad3.cd()
82
pad3.GetFrame().
SetFillColor
(38)
83
pad3.GetFrame().
SetBorderSize
(8)
84
ntuple.SetMarkerColor(1)
85
ntuple.Draw(
'py:px'
,
'pz>1'
)
86
ntuple.SetMarkerColor(2)
87
ntuple.Draw(
'py:px'
,
'pz<1'
,
'same'
)
88
c1.Update()
89
90
#
91
# Display a 3-D scatter plot of 3 columns. Superimpose a different selection.
92
pad4.cd()
93
ntuple.Draw(
'pz:py:px'
,
'(pz<10 && pz>6)+(pz<4 && pz>3)'
)
94
ntuple.SetMarkerColor(4)
95
ntuple.Draw(
'pz:py:px'
,
'pz<6 && pz>4'
,
'same'
)
96
ntuple.SetMarkerColor(5)
97
ntuple.Draw(
'pz:py:px'
,
'pz<4 && pz>3'
,
'same'
)
98
l4 =
TPaveText
(-0.9,0.5,0.9,0.95)
99
l4.SetFillColor(42)
100
l4.SetTextAlign(12)
101
l4.AddText(
'You can interactively rotate this view in 2 ways:'
)
102
l4.AddText(
' - With the RotateCube in clicking in this pad'
)
103
l4.AddText(
' - Selecting View with x3d in the View menu'
)
104
l4.Draw()
105
106
#
107
# done
108
c1.cd()
109
c1.Update()
110
gStyle.SetStatColor(19)
111
gBenchmark.Show(
'ntuple1'
)
SetFillColor
Option_t Option_t SetFillColor
Definition
TGWin32VirtualXProxy.cxx:50
TCanvas
The Canvas class.
Definition
TCanvas.h:23
TFile
A ROOT file is an on-disk file, usually with extension .root, that stores objects in a file-system-li...
Definition
TFile.h:53
TPad
The most important graphics class in the ROOT system.
Definition
TPad.h:28
TPaveText
A Pave (see TPave) with text, lines or/and boxes inside.
Definition
TPaveText.h:21
SetBorderSize
c SetBorderSize(2)
tutorials
pyroot
ntuple1.py
ROOT master - Reference Guide Generated on Wed Oct 9 2024 09:09:06 (GVA Time) using Doxygen 1.9.8