doc/v630/testMergeCont_8C.html

TFile *f;


TSeqCollection *GetCollection()

{

   TObject *obj;

#ifndef ClingWorkAroundMissingDynamicScope

# define ClingWorkAroundMissingDynamicScope

#endif

   f = TFile::Open("hsimple.root");

   if( !f ) {

#ifdef ClingWorkAroundMissingDynamicScope

     f = (TFile*)gROOT->ProcessLine("hsimple(1);");

#else

     f = hsimple(1);

#endif

   }

   gROOT->cd();

   TList *l0 = new TList();

   TList *l01 = new TList();

   TH1 *hpx = (TH1*)f->Get("hpx");

   printf("Adding hpx: %d entries\n", (int)hpx->GetEntries());

   l01->Add(hpx);

   TH1 *hpxpy = (TH1*)f->Get("hpxpy");

   l01->Add(hpxpy);

   TH1 *hprof = (TH1*)f->Get("hprof");

   l0->Add(hprof);

   l0->Add(l01);

   return l0;

}


void testMergeCont()

{

   TString tutdir = gROOT->GetTutorialDir();

   gROOT->LoadMacro(tutdir+"/hsimple.C");

   TList *list1 = (TList *)GetCollection();

   TList *inputs = new TList();

   for (Int_t i=0; i<10; i++) {

      inputs->AddAt(GetCollection(),0);

      list1->Merge(inputs);

      inputs->Delete();

      f->Close();

   }

   delete inputs;

   TH1F *hpx = (TH1F*)(((TList*)list1->At(1))->At(0));

   printf("============================================\n");

   printf("Total  hpx: %d entries\n", (int)hpx->GetEntries());

   hpx->Draw();

   list1->Delete();

   delete list1;

}

f
#define f(i)
Definition RSha256.hxx:104

Int_t
int Int_t
Definition RtypesCore.h:45

gROOT
#define gROOT
Definition TROOT.h:407

TFile
A ROOT file is composed of a header, followed by consecutive data records (TKey instances) with a wel...
Definition TFile.h:53

TFile::Open
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.
Definition TFile.cxx:4075

TH1F
1-D histogram with a float per channel (see TH1 documentation)}
Definition TH1.h:577

TH1
TH1 is the base class of all histogram classes in ROOT.
Definition TH1.h:58

TH1::Draw
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition TH1.cxx:3067

TH1::GetEntries
virtual Double_t GetEntries() const
Return the current number of entries.
Definition TH1.cxx:4426

TList
A doubly linked list.
Definition TList.h:38

TList::AddAt
void AddAt(TObject *obj, Int_t idx) override
Insert object at position idx in the list.
Definition TList.cxx:306

TList::Add
void Add(TObject *obj) override
Definition TList.h:81

TList::Delete
void Delete(Option_t *option="") override
Remove all objects from the list AND delete all heap based objects.
Definition TList.cxx:470

TList::At
TObject * At(Int_t idx) const override
Returns the object at position idx. Returns 0 if idx is out of range.
Definition TList.cxx:357

TObject
Mother of all ROOT objects.
Definition TObject.h:41

TSeqCollection
Sequenceable collection abstract base class.
Definition TSeqCollection.h:28

TSeqCollection::Merge
Long64_t Merge(TCollection *list)
Merge this collection with all collections coming in the input list.
Definition TSeqCollection.cxx:185

TString
Basic string class.
Definition TString.h:139

hsimple
Definition hsimple.py:1