ROOT
v6-22
Reference Guide
testMergeCont.C File Reference
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Detailed Description
Macro demonstrating the merging of containers.
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:43
gROOT
#define gROOT
Definition:
TROOT.h:406
TFile
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
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:3942
TH1F
1-D histogram with a float per channel (see TH1 documentation)}
Definition:
TH1.h:571
TH1
The TH1 histogram class.
Definition:
TH1.h:56
TH1::GetEntries
virtual Double_t GetEntries() const
Return the current number of entries.
Definition:
TH1.cxx:4302
TH1::Draw
virtual void Draw(Option_t *option="")
Draw this histogram with options.
Definition:
TH1.cxx:2998
TList
A doubly linked list.
Definition:
TList.h:44
TList::Add
virtual void Add(TObject *obj)
Definition:
TList.h:87
TList::AddAt
virtual void AddAt(TObject *obj, Int_t idx)
Insert object at position idx in the list.
Definition:
TList.cxx:305
TList::At
virtual TObject * At(Int_t idx) const
Returns the object at position idx. Returns 0 if idx is out of range.
Definition:
TList.cxx:356
TList::Delete
virtual void Delete(Option_t *option="")
Remove all objects from the list AND delete all heap based objects.
Definition:
TList.cxx:469
TObject
Mother of all ROOT objects.
Definition:
TObject.h:37
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:131
hsimple
Definition:
hsimple.py:1
Author
The Root Team
Definition in file
testMergeCont.C
.
tutorials
io
testMergeCont.C
ROOT v6-22 - Reference Guide Generated on Fri Apr 1 2022 11:54:18 (GVA Time) using Doxygen 1.9.4