How could I get histogram data form Tree?

Please provide the following information:

ROOT Version (e.g. 6.12/02): 6.10/02
Platform, compiler (e.g. CentOS 7.3, gcc6.2):


So, what I want to do is to copy the data of histogram from the tree and seek integration of signals.

But I don’t know how I can start with…


just to clarify, you would like to create a histogram out of data in a Tree? If yes, you can start from TDataFrame.


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