How to extract information event by event

I have done some simulation with 10k events. I am storing the information by creating NTuple.
Finally I am getting an overall spectrum where the number of entries are 213234.

For each individual event there is a similar kind of distribution of time with lesser no of entries. How to get the information for every event from this final histogram?


If I understand correctly, you want to create histograms of some quantities that are stored in a ntuple (a TTree I asume, concretely), right?

If yes, my suggestion would be to be to use RDataFrame. Quite some documentation is available at that page. Should there be any doubts, don’t hesitate to come back with specific questions.