testMergeCont¶
Macro demonstrating the merging of containers.
Author: The Root Team
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Friday, March 24, 2023 at 10:55 AM.
In [1]:
TFile *f;
Definition of a helper function:
In [2]:
%%cpp -d
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;
}
In [3]:
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;
Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries Adding hpx: 25000 entries ============================================ Total hpx: 275000 entries
Info in <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
Draw all canvases
In [4]:
gROOT->GetListOfCanvases()->Draw()
