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Reference Guide
h1analysisTreeReader.C File Reference

Detailed Description

View in nbviewer Open in SWAN H1 analysis example expressed in terms of TTreeReader

#include "TStyle.h"
#include "TCanvas.h"
#include "TPaveStats.h"
#include "TLine.h"
#include "TMath.h"
#include "TFile.h"
#include "TROOT.h"
const Double_t dxbin = (0.17-0.13)/40; // Bin-width
const Double_t sigma = 0.0012;
//_____________________________________________________________________
{
Double_t x = xx[0];
if (x <= 0.13957) return 0;
Double_t xp3 = (x-par[3])*(x-par[3]);
Double_t res = dxbin*(par[0]*TMath::Power(x-0.13957, par[1])
+ par[2] / 2.5066/par[4]*TMath::Exp(-xp3/2/par[4]/par[4]));
return res;
}
//_____________________________________________________________________
{
Double_t x = xx[0];
if (x <= 0.13957) return 0;
Double_t xp3 = (x-0.1454)*(x-0.1454);
Double_t res = dxbin*(par[0]*TMath::Power(x-0.13957, 0.25)
+ par[1] / 2.5066/sigma*TMath::Exp(-xp3/2/sigma/sigma));
return res;
}
//_____________________________________________________________________
// entry is the entry number in the current Tree
// Selection function to select D* and D0.
//in case one entry list is given in input, the selection has already been done.
if (!useList) {
// Return as soon as a bad entry is detected
if (TMath::Abs(*fMd0_d-1.8646) >= 0.04) return kFALSE;
if (*fPtds_d <= 2.5) return kFALSE;
if (TMath::Abs(*fEtads_d) >= 1.5) return kFALSE;
(*fIk)--; //original fIk used f77 convention starting at 1
(*fIpi)--;
if (fNhitrp.At(*fIk)* fNhitrp.At(*fIpi) <= 1) return kFALSE;
if (fRend.At(*fIk) -fRstart.At(*fIk) <= 22) return kFALSE;
if (fRend.At(*fIpi)-fRstart.At(*fIpi) <= 22) return kFALSE;
if (fNlhk.At(*fIk) <= 0.1) return kFALSE;
if (fNlhpi.At(*fIpi) <= 0.1) return kFALSE;
(*fIpis)--; if (fNlhpi.At(*fIpis) <= 0.1) return kFALSE;
if (*fNjets < 1) return kFALSE;
}
// if option fillList, fill the entry list
if (fillList) elist->Enter(entry);
//fill some histograms
h2->Fill(*fDm_d,*fRpd0_t/0.029979*1.8646/ *fPtd0_d);
return kTRUE;
}
// function called before starting the event loop
// -it performs some cleanup
// -it creates histograms
// -it sets some initialisation for the entry list
Reset();
//print the option specified in the Process function.
TString option = GetOption();
Info("Begin", "starting h1analysis with process option: %s", option.Data());
delete gDirectory->GetList()->FindObject("elist");
// case when one creates/fills the entry list
if (option.Contains("fillList")) {
elist = new TEntryList("elist", "H1 selection from Cut");
// Add to the input list for processing in PROOF, if needed
if (fInput) {
fInput->Add(new TNamed("fillList",""));
// We send a clone to avoid double deletes when importing the result
// This is needed to avoid warnings from output-to-members mapping
elist = 0;
}
Info("Begin", "creating an entry-list");
}
// case when one uses the entry list generated in a previous call
if (option.Contains("useList")) {
if (fInput) {
// In PROOF option "useList" is processed in SlaveBegin and we do not need
// to do anything here
} else {
TFile f("elist.root");
elist = (TEntryList*)f.Get("elist");
if (elist) elist->SetDirectory(0); //otherwise the file destructor will delete elist
}
}
}
// function called before starting the event loop
// -it performs some cleanup
// -it creates histograms
// -it sets some initialisation for the entry list
Init(myTree);
//print the option specified in the Process function.
TString option = GetOption();
Info("SlaveBegin",
"starting h1analysis with process option: %s (tree: %p)", option.Data(), myTree);
//create histograms
hdmd = new TH1F("hdmd","Dm_d",40,0.13,0.17);
h2 = new TH2F("h2","ptD0 vs Dm_d",30,0.135,0.165,30,-3,6);
// Entry list stuff (re-parse option because on PROOF only SlaveBegin is called)
if (option.Contains("fillList")) {
// Get the list
if (fInput) {
if ((elist = (TEntryList *) fInput->FindObject("elist")))
// Need to clone to avoid problems when destroying the selector
if (elist)
else
}
}
if (fillList) Info("SlaveBegin", "creating an entry-list");
if (option.Contains("useList")) useList = kTRUE;
}
// function called at the end of the event loop
hdmd = dynamic_cast<TH1F*>(fOutput->FindObject("hdmd"));
h2 = dynamic_cast<TH2F*>(fOutput->FindObject("h2"));
if (hdmd == 0 || h2 == 0) {
Error("Terminate", "hdmd = %p , h2 = %p", hdmd, h2);
return;
}
//create the canvas for the h1analysis fit
TCanvas *c1 = new TCanvas("c1","h1analysis analysis",10,10,800,600);
c1->SetBottomMargin(0.15);
hdmd->GetXaxis()->SetTitle("m_{K#pi#pi} - m_{K#pi}[GeV/c^{2}]");
//fit histogram hdmd with function f5 using the loglfIkelihood option
if (gROOT->GetListOfFunctions()->FindObject("f5"))
delete gROOT->GetFunction("f5");
TF1 *f5 = new TF1("f5",fdm5,0.139,0.17,5);
f5->SetParameters(1000000, .25, 2000, .1454, .001);
hdmd->Fit("f5","lr");
//create the canvas for tau d0
TCanvas *c2 = new TCanvas("c2","tauD0",100,100,800,600);
c2->SetGrid();
c2->SetBottomMargin(0.15);
// Project slices of 2-d histogram h2 along X , then fit each slice
// with function f2 and make a histogram for each fit parameter
// Note that the generated histograms are added to the list of objects
// in the current directory.
if (gROOT->GetListOfFunctions()->FindObject("f2"))
delete gROOT->GetFunction("f2");
TF1 *f2 = new TF1("f2",fdm2,0.139,0.17,2);
f2->SetParameters(10000, 10);
h2->FitSlicesX(f2,0,-1,1,"qln");
TH1D *h2_1 = (TH1D*)gDirectory->Get("h2_1");
h2_1->GetXaxis()->SetTitle("#tau[ps]");
h2_1->SetMarkerStyle(21);
h2_1->Draw();
c2->Update();
TLine *line = new TLine(0,0,0,c2->GetUymax());
line->Draw();
// Have the number of entries on the first histogram (to cross check when running
// with entry lists)
psdmd->SetOptStat(1110);
c1->Modified();
//save the entry list to a Root file if one was produced
if (fillList) {
if (!elist)
elist = dynamic_cast<TEntryList*>(fOutput->FindObject("elist"));
if (elist) {
Printf("Entry list 'elist' created:");
TFile efile("elist.root","recreate");
} else {
Error("Terminate", "entry list requested but not found in output");
}
}
// Notify the amount of processed events
if (!fInput) Info("Terminate", "processed %lld events", fProcessed);
}
}
// called when loading a new file
// get branch pointers
Info("Notify","processing file: %s",myTreeReader.GetTree()->GetCurrentFile()->GetName());
if (fillList) {
} else if (useList) {
}
}
return kTRUE;
}
Author
Anders Eie, 2013

Definition in file h1analysisTreeReader.C.

h1analysisTreeReader::hdmd
TH1F * hdmd
Definition: h1analysisTreeReader.h:32
h1analysisTreeReader::fRpd0_t
TTreeReaderValue< Float_t > fRpd0_t
Definition: h1analysisTreeReader.h:24
kTRUE
const Bool_t kTRUE
Definition: RtypesCore.h:91
TLine.h
TSelector::GetOption
virtual const char * GetOption() const
Definition: TSelector.h:57
f
#define f(i)
Definition: RSha256.hxx:122
h1analysisTreeReader::fIpi
TTreeReaderValue< Int_t > fIpi
Definition: h1analysisTreeReader.h:20
TLine
Definition: TLine.h:22
h1analysisTreeReader::fIk
TTreeReaderValue< Int_t > fIk
Definition: h1analysisTreeReader.h:19
h1analysisTreeReader::fPtds_d
TTreeReaderValue< Float_t > fPtds_d
Definition: h1analysisTreeReader.h:16
h1analysisTreeReader::fEtads_d
TTreeReaderValue< Float_t > fEtads_d
Definition: h1analysisTreeReader.h:17
TH2F
2-D histogram with a float per channel (see TH1 documentation)}
Definition: TH2.h:251
TList::FindObject
virtual TObject * FindObject(const char *name) const
Find an object in this list using its name.
Definition: TList.cxx:577
TString::Data
const char * Data() const
Definition: TString.h:369
TObject::Info
virtual void Info(const char *method, const char *msgfmt,...) const
Issue info message.
Definition: TObject.cxx:864
Long64_t
long long Long64_t
Definition: RtypesCore.h:73
TObject::Error
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition: TObject.cxx:890
TTree
Definition: TTree.h:79
h1analysisTreeReader::fRstart
TTreeReaderArray< Float_t > fRstart
Definition: h1analysisTreeReader.h:26
TH1D
1-D histogram with a double per channel (see TH1 documentation)}
Definition: TH1.h:615
h1analysisTreeReader::fNjets
TTreeReaderValue< Int_t > fNjets
Definition: h1analysisTreeReader.h:30
TMath::Exp
Double_t Exp(Double_t x)
Definition: TMath.h:727
TStyle.h
TPaveStats.h
h1analysisTreeReader::Process
Bool_t Process(Long64_t entry)
TString::Contains
Bool_t Contains(const char *pat, ECaseCompare cmp=kExact) const
Definition: TString.h:624
x
Double_t x[n]
Definition: legend1.C:17
h1analysisTreeReader::Init
void Init(TTree *myTree)
Definition: h1analysisTreeReader.h:67
h1analysisTreeReader::Notify
Bool_t Notify()
This method must be overridden to handle object notification.
TH1::GetListOfFunctions
TList * GetListOfFunctions() const
Definition: TH1.h:240
TTreeReaderArray::At
T & At(std::size_t idx)
Definition: TTreeReaderArray.h:205
TMath::Abs
Short_t Abs(Short_t d)
Definition: TMathBase.h:120
TCanvas.h
TEntryList::SetTree
virtual void SetTree(const TTree *tree)
If a list for a tree with such name and filename exists, sets it as the current sublist If not,...
Definition: TEntryList.cxx:1194
TString
Definition: TString.h:136
Bool_t
bool Bool_t
Definition: RtypesCore.h:63
fdm5
Double_t fdm5(Double_t *xx, Double_t *par)
Definition: h1analysisProxy.h:14
TFile.h
TStyle::SetOptFit
void SetOptFit(Int_t fit=1)
The type of information about fit parameters printed in the histogram statistics box can be selected ...
Definition: TStyle.cxx:1544
TPaveStats
Definition: TPaveStats.h:18
h1analysisTreeReader::fIpis
TTreeReaderValue< Int_t > fIpis
Definition: h1analysisTreeReader.h:21
TROOT.h
TF1::SetParameters
virtual void SetParameters(const Double_t *params)
Definition: TF1.h:640
h1analysisTreeReader::useList
Bool_t useList
Definition: h1analysisTreeReader.h:35
h1analysisTreeReader::myTreeReader
TTreeReader myTreeReader
Definition: h1analysisTreeReader.h:14
h1analysisTreeReader::fDm_d
TTreeReaderValue< Float_t > fDm_d
Definition: h1analysisTreeReader.h:18
TTree::GetCurrentFile
TFile * GetCurrentFile() const
Return pointer to the current file.
Definition: TTree.cxx:5378
h1analysisTreeReader::SlaveBegin
void SlaveBegin(TTree *)
h1analysisTreeReader::fRend
TTreeReaderArray< Float_t > fRend
Definition: h1analysisTreeReader.h:27
TTreeReader::GetTree
TTree * GetTree() const
Definition: TTreeReader.h:173
gStyle
R__EXTERN TStyle * gStyle
Definition: TStyle.h:412
dxbin
const Double_t dxbin
Definition: h1analysisProxy.h:10
TEntryList::Enter
virtual Bool_t Enter(Long64_t entry, TTree *tree=0)
Add entry #entry to the list.
Definition: TEntryList.cxx:560
THashList::FindObject
TObject * FindObject(const char *name) const
Find object using its name.
Definition: THashList.cxx:262
h1analysisTreeReader::Begin
void Begin(TTree *)
h1analysisTreeReader::fillList
Bool_t fillList
Definition: h1analysisTreeReader.h:36
TNamed
Definition: TNamed.h:29
kFALSE
const Bool_t kFALSE
Definition: RtypesCore.h:92
TTree::SetEntryList
virtual void SetEntryList(TEntryList *list, Option_t *opt="")
Set an EntryList.
Definition: TTree.cxx:8861
TNamed::Clone
virtual TObject * Clone(const char *newname="") const
Make a clone of an object using the Streamer facility.
Definition: TNamed.cxx:74
TMath::Power
LongDouble_t Power(LongDouble_t x, LongDouble_t y)
Definition: TMath.h:735
gDirectory
#define gDirectory
Definition: TDirectory.h:236
h1analysisTreeReader::h2
TH2F * h2
Definition: h1analysisTreeReader.h:33
TH1::Fill
virtual Int_t Fill(Double_t x)
Increment bin with abscissa X by 1.
Definition: TH1.cxx:3274
h1analysisTreeReader::fMd0_d
TTreeReaderValue< Float_t > fMd0_d
Definition: h1analysisTreeReader.h:23
h1analysisTreeReader::Reset
void Reset()
Definition: h1analysisTreeReader.h:81
h1analysisTreeReader::fPtd0_d
TTreeReaderValue< Float_t > fPtd0_d
Definition: h1analysisTreeReader.h:22
TNamed::SetTitle
virtual void SetTitle(const char *title="")
Set the title of the TNamed.
Definition: TNamed.cxx:164
line
TLine * line
Definition: entrylistblock_figure1.C:235
h1analysisTreeReader.h
TStyle::SetOptStat
void SetOptStat(Int_t stat=1)
The type of information printed in the histogram statistics box can be selected via the parameter mod...
Definition: TStyle.cxx:1592
TFile
Definition: TFile.h:54
h1analysisTreeReader::elist
TEntryList * elist
Definition: h1analysisTreeReader.h:37
TH2::FitSlicesX
virtual void FitSlicesX(TF1 *f1=0, Int_t firstybin=0, Int_t lastybin=-1, Int_t cut=0, Option_t *option="QNR", TObjArray *arr=0)
Project slices along X in case of a 2-D histogram, then fit each slice with function f1 and make a hi...
Definition: TH2.cxx:897
TH2::Fill
Int_t Fill(Double_t)
Invalid Fill method.
Definition: TH2.cxx:294
TEntryList
Definition: TEntryList.h:25
Printf
void Printf(const char *fmt,...)
sigma
const Double_t sigma
Definition: h1analysisProxy.h:11
TObject::Draw
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:197
Double_t
double Double_t
Definition: RtypesCore.h:59
TSelector::fOutput
TSelectorList * fOutput
! List of objects created during processing
Definition: TSelector.h:42
TTreeReader::SetLocalEntry
EEntryStatus SetLocalEntry(Long64_t entry)
Set the next local tree entry.
Definition: TTreeReader.h:201
TCanvas
Definition: TCanvas.h:23
TH1F
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:572
h1analysisTreeReader::Terminate
void Terminate()
TObject::Write
virtual Int_t Write(const char *name=0, Int_t option=0, Int_t bufsize=0)
Write this object to the current directory.
Definition: TObject.cxx:795
TList::Add
virtual void Add(TObject *obj)
Definition: TList.h:87
TEntryList::Print
virtual void Print(const Option_t *option="") const
Print this list.
Definition: TEntryList.cxx:999
h1analysisTreeReader::fNhitrp
TTreeReaderArray< Int_t > fNhitrp
Definition: h1analysisTreeReader.h:25
h1analysisTreeReader::fNlhpi
TTreeReaderArray< Float_t > fNlhpi
Definition: h1analysisTreeReader.h:29
h1analysisTreeReader::fNlhk
TTreeReaderArray< Float_t > fNlhk
Definition: h1analysisTreeReader.h:28
h1analysisTreeReader::fProcessed
Long64_t fProcessed
Definition: h1analysisTreeReader.h:38
c2
return c2
Definition: legend2.C:14
TH1::Fit
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:3807
TNamed::GetName
virtual const char * GetName() const
Returns name of object.
Definition: TNamed.h:53
TAttAxis::SetTitleOffset
virtual void SetTitleOffset(Float_t offset=1)
Set distance between the axis and the axis title.
Definition: TAttAxis.cxx:293
TF1
1-Dim function class
Definition: TF1.h:212
TSelector::fInput
TList * fInput
List of objects available during processing.
Definition: TSelector.h:41
fdm2
Double_t fdm2(Double_t *xx, Double_t *par)
Definition: h1analysisProxy.h:25
TH1::GetXaxis
TAxis * GetXaxis()
Get the behaviour adopted by the object about the statoverflows. See EStatOverflows for more informat...
Definition: TH1.h:317
TPaveStats::SetOptStat
void SetOptStat(Int_t stat=1)
Set the stat option.
Definition: TPaveStats.cxx:303
TEntryList::SetDirectory
virtual void SetDirectory(TDirectory *dir)
Add reference to directory dir. dir can be 0.
Definition: TEntryList.cxx:1068
TMath.h
h1analysisTreeReader::SlaveTerminate
void SlaveTerminate()
gROOT
#define gROOT
Definition: TROOT.h:406
TH1::Draw
virtual void Draw(Option_t *option="")
Draw this histogram with options.
Definition: TH1.cxx:2997
c1
return c1
Definition: legend1.C:41