Dear ROOT community,
I’m trying to access an object stored in a ROOT file.
In the file there is a TTree, CollectionTree
, which contains a branch I’m interested in, ptcone30
. When I do CollectionTree->Print()
one of the branches reads:
*Br 194 :TruthMuonsAuxDyn.ptcone30 : vector<float> *
*Entries : 3968 : Total Size= 105667 bytes File Size = 48214 *
*Baskets : 15 : Basket Size= 8192 bytes Compression= 2.18 *
*............................................................................*
Thus far I’ve accessed many variables of this file successfully by running through t.GetEntries()
(i.e. events) and then running through t.TruthMuons (i.e. muons in an event) where t=CollectionTree. I could do
for mu in t.TruthMuons():
print (mu.pt())
successfully. Mind that if I do print (t.GetBranch("TruthMuons"))
I get <ROOT.TBranchObject object ("TruthMuons") at 0xbc23f80>
i.e. a valid memory slot. Nonetheless when I do the same for a branch named TruthMuonsAuxDyn
I get <ROOT.TBranch object at 0x(nil)>
. This indicates accessing this isn’t obvious. Ideally I would have done
for mu in t.TruthMuons():
print (mu.ptcone30())
but if this had worked I wouldn’t have been here.
Any help would be highly appreciated!
_ROOT Version: 21.2.160
_Platform: Linux
_Compiler: g++