Access IDs of Entries in a given Tree Selection

[Baloo]

Dear All,

I have one question concerning the use of TTree.

I am storing some data inside a Tree. Afterwards, I would like to be able selecting only the entries according to some selection criteria.
Since I need to post-process those entries, it is not enough to Draw() them with a “selection”. I should instead be able retrieving the index of each single entry fulfilling the selection criteria.

Is it possible with the current TTree methods?

I thank you for your support.

Best regards

[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…