Creating multiple histograms from columnar dataset with different conditions

Hi @PKimPhysics ,

and welcome to the ROOT forum.

See e.g. this post for a C++ example of something similar done with RDataFrame.

RDataFrame’s user guide is here and there are a number of C++ and Python tutorials available here.

Basically you want to create a list/vector of RDataFrame results that you fill, in a loop, with several result histograms.

I hope this helps.
Enrico