Hi,
i’m learning how to use TDataFrame but I have a question:
how can i weight events in a Histo1D like doing?
mytree->Draw("a_variable>>myhisto","eventweight","");
for example I have an histogram like this one and I want to apply to it the weight eventweight
like in the previous line:
auto myhisto = selected_events.Histo1D({"myhisto", "myhisto", 10, 1, 11}, "avariable");
Federico
ROOT Version:
Platform, compiler:
Danilo
2
Hi Federico,
you can add the column name that you want to act as weight as the third argument of the Histo1D method. In code, it’s shorter than in English
auto myhisto = selected_events.Histo1D({"myhisto", "myhisto", 10, 1, 11}, "avariable", "eventweight");
Cheers,
D
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system
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