TClonesArray unable to access member functions

[gman]

Hi All,
I have a TBranchObject from a TTree, ‘Reco_QQ_4mom’, that I would like to loop through.I believe it is an array of TLorentzVector’s. If I use the ->GetClassName() function on the TBranch it returns TClonesArray, but if I try to use relevant TClonesArray functions on ‘Reco_QQ_4mom’ (such as ->At(i) ) to try loop through it, I get the error " error: no member named ‘First’ in ‘TBranch’ ". Is anyone able to inform me of what is going wrong or provide an alternative approach?

Cheers!

[Wile_E_Coyote]

Header files for Trees

“Most recent” documentation about how to generate and use an “analysis skeleton”: TTree::MakeClass (see also “ROOT User’s Guide” → “Trees” → “Using TTree::MakeClass”) TTree::MakeSelector (see also “ROOT Primer” → “File I/O and Parallel Analysis” → “N-tuples in ROOT” → “For the advanced user: Processing trees with a selector script” and “ROOT User’s Guide” → “Trees” → “Using TTree::MakeSelector” and “ROOT User’s Guide” → “Example Analysis”) TTree::MakeProxy ROOT::RDataFrame (uses the T…

[gman]

Sorry, I’m unable to see how this helps, are you able to provide some more details ?

[Wile_E_Coyote]

If you don’t know how to deal with your tree, see how various flavours of automatically generated “analysis skeletons” deal with it.