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ntuple1.C
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1/// \file
2/// \ingroup tutorial_tree
3/// \notebook
4/// Simple tree analysis.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Rene Brun
10
11#include "TCanvas.h"
12#include "TFile.h"
13#include "TNtuple.h"
14#include "TProfile.h"
15#include "TBenchmark.h"
16#include "TStyle.h"
17#include "TPaveText.h"
18#include "TFrame.h"
19#include "TF1.h"
20#include "TROOT.h"
21#include "TSystem.h"
22#include "TInterpreter.h"
23
24void ntuple1() {
25
26 //just in case this script is executed multiple times
27 delete gROOT->GetListOfFiles()->FindObject("hsimple.root");
28 delete gROOT->GetListOfCanvases()->FindObject("c1");
29
30 gBenchmark->Start("ntuple1");
31 //
32 // Connect ROOT histogram/ntuple demonstration file
33 // generated by example $ROOTSYS/tutorials/hsimple.C.
34 TString dir = gROOT->GetTutorialDir();
35 dir.Append("/hsimple.C");
36 dir.ReplaceAll("/./","/");
37 if (gBenchmark->GetBench("hsimple") < 0) gInterpreter->LoadMacro(dir.Data());
38 TFile *f1 = (TFile*)gROOT->ProcessLineFast("hsimple(1)");
39 if (!f1) return;
40 //
41 // Create a canvas, with 4 pads
42 //
43 TCanvas *c1 = new TCanvas("c1","The Ntuple canvas",200,10,700,780);
44 TPad *pad1 = new TPad("pad1","This is pad1",0.02,0.52,0.48,0.98,21);
45 TPad *pad2 = new TPad("pad2","This is pad2",0.52,0.52,0.98,0.98,21);
46 TPad *pad3 = new TPad("pad3","This is pad3",0.02,0.02,0.48,0.48,21);
47 TPad *pad4 = new TPad("pad4","This is pad4",0.52,0.02,0.98,0.48,1);
48 pad1->Draw();
49 pad2->Draw();
50 pad3->Draw();
51 pad4->Draw();
52 //
53 // Change default style for the statistics box
54 gStyle->SetStatW(0.30);
55 gStyle->SetStatH(0.20);
56 //
57 // Display a function of one ntuple column imposing a condition
58 // on another column.
59 pad1->cd();
60 pad1->SetGrid();
61 pad1->SetLogy();
62 TNtuple *ntuple = (TNtuple*)f1->Get("ntuple");
63 ntuple->SetLineColor(1);
64 ntuple->SetFillStyle(1001);
65 ntuple->SetFillColor(45);
66 ntuple->Draw("3*px+2","px**2+py**2>1");
67 ntuple->SetFillColor(38);
68 ntuple->Draw("2*px+2","pz>2","same");
69 ntuple->SetFillColor(5);
70 ntuple->Draw("1.3*px+2","(px^2+py^2>4) && py>0","same");
71 pad1->RedrawAxis();
72 //
73 // Display the profile of two columns
74 // The profile histogram produced is saved in the current directory with
75 // the name hprofs
76 pad2->cd();
77 pad2->SetGrid();
78 ntuple->Draw("pz:px>>hprofs","","goffprofs");
79 TProfile *hprofs = (TProfile*)gDirectory->Get("hprofs");
80 hprofs->SetMarkerColor(5);
81 hprofs->SetMarkerSize(0.7);
82 hprofs->SetMarkerStyle(21);
83 hprofs->Fit("pol2");
84 // Get pointer to fitted function and modify its attributes
85 TF1 *fpol2 = hprofs->GetFunction("pol2");
86 fpol2->SetLineWidth(4);
87 fpol2->SetLineColor(2);
88 //
89 // Display a scatter plot of two columns with a selection.
90 // Superimpose the result of another cut with a different marker color
91 pad3->cd();
92 pad3->GetFrame()->SetBorderSize(8);
93 ntuple->SetMarkerColor(1);
94 ntuple->Draw("py:px","pz>1");
95 ntuple->SetMarkerColor(2);
96 ntuple->Draw("py:px","pz<1","same");
97 //
98 // Display a 3-D scatter plot of 3 columns. Superimpose a different selection.
99 pad4->cd();
100 ntuple->Draw("pz:py:px","(pz<10 && pz>6)+(pz<4 && pz>3)");
101 ntuple->SetMarkerColor(4);
102 ntuple->Draw("pz:py:px","pz<6 && pz>4","same");
103 ntuple->SetMarkerColor(5);
104 ntuple->Draw("pz:py:px","pz<4 && pz>3","same");
105 TPaveText *l4 = new TPaveText(-0.9,0.5,0.9,0.95);
106 l4->SetFillColor(42);
107 l4->SetTextAlign(12);
108 l4->AddText("You can interactively rotate this view in 2 ways:");
109 l4->AddText(" - With the RotateCube in clicking in this pad");
110 l4->AddText(" - Selecting View with x3d in the View menu");
111 l4->Draw();
112 //
113 c1->cd();
114 c1->Update();
115 gStyle->SetStatColor(19);
116 gBenchmark->Show("ntuple1");
117}
R__EXTERN TBenchmark * gBenchmark
Definition: TBenchmark.h:59
#define gDirectory
Definition: TDirectory.h:348
#define gInterpreter
Definition: TInterpreter.h:564
#define gROOT
Definition: TROOT.h:404
R__EXTERN TStyle * gStyle
Definition: TStyle.h:414
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
virtual void SetFillStyle(Style_t fstyle)
Set the fill area style.
Definition: TAttFill.h:39
virtual void SetLineWidth(Width_t lwidth)
Set the line width.
Definition: TAttLine.h:43
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition: TAttLine.h:40
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition: TAttMarker.h:38
virtual void SetMarkerStyle(Style_t mstyle=1)
Set the marker style.
Definition: TAttMarker.h:40
virtual void SetMarkerSize(Size_t msize=1)
Set the marker size.
Definition: TAttMarker.h:45
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:42
Int_t GetBench(const char *name) const
Returns index of Benchmark name.
Definition: TBenchmark.cxx:106
virtual void Start(const char *name)
Starts Benchmark with the specified name.
Definition: TBenchmark.cxx:172
virtual void Show(const char *name)
Stops Benchmark name and Prints results.
Definition: TBenchmark.cxx:155
The Canvas class.
Definition: TCanvas.h:23
1-Dim function class
Definition: TF1.h:213
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition: TFile.h:54
virtual TFitResultPtr Fit(const char *formula, Option_t *option="", Option_t *goption="", Double_t xmin=0, Double_t xmax=0)
Fit histogram with function fname.
Definition: TH1.cxx:3894
virtual TF1 * GetFunction(const char *name) const
Return pointer to function with name.
Definition: TH1.cxx:8918
A simple TTree restricted to a list of float variables only.
Definition: TNtuple.h:28
The most important graphics class in the ROOT system.
Definition: TPad.h:27
void SetGrid(Int_t valuex=1, Int_t valuey=1) override
Definition: TPad.h:327
void SetLogy(Int_t value=1) override
Set Lin/Log scale for Y.
Definition: TPad.cxx:5921
void RedrawAxis(Option_t *option="") override
Redraw the frame axis.
Definition: TPad.cxx:5267
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition: TPad.cxx:597
TFrame * GetFrame() override
Get frame.
Definition: TPad.cxx:2829
void Draw(Option_t *option="") override
Draw Pad in Current pad (re-parent pad if necessary).
Definition: TPad.cxx:1267
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
Definition: TPaveText.cxx:187
void Draw(Option_t *option="") override
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:238
Profile Histogram.
Definition: TProfile.h:32
Basic string class.
Definition: TString.h:136
const char * Data() const
Definition: TString.h:369
TString & ReplaceAll(const TString &s1, const TString &s2)
Definition: TString.h:692
TString & Append(const char *cs)
Definition: TString.h:564
void SetStatH(Float_t h=0.1)
Definition: TStyle.h:384
void SetStatColor(Color_t color=19)
Definition: TStyle.h:374
void SetStatW(Float_t w=0.19)
Definition: TStyle.h:383
void Draw(Option_t *opt) override
Default Draw method for all objects.
Definition: TTree.h:428
virtual void SetBorderSize(Short_t bordersize)
Definition: TWbox.h:52
return c1
Definition: legend1.C:41
TF1 * f1
Definition: legend1.C:11