Access tree in a .root file

[gugi]

Hi everyone!
Can you please tell me ho to access the trees you see in the picture “events;6” and “events;5” ? I am used to files with a level less and nothing works!
Can you also please tell me if it is possible to merge the two trees into a single one?
Thanks in advance!

[pamputt]

Hi Gugi,
to access to your tree, you can adapt the hsimpleReader.C tutorial. You may also find other tutorials about TTree here.

[Wile_E_Coyote]

Aux;1 aux;2 aux3;

Search for “cycle” and/or “namecycle”, for example in: In a Nutshell: Input and Output . ROOT User’s Guide: Input/Output : Retrieving Objects from Disk , Subdirectories and Navigation . Just for reference: some additional notes about GetObject, Get, FindObjectAny, FindKeyAny, ReadObj, ReadObjAny .

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…