Hi, I am not sure what is the proper way to project an ntuple into a profile histogram. I would like to predefine a profile TProfile with "x" range and number of bins, and "y" range. If I use then Draw("x:y>>hprof",..,"prof") should I still put cut on "y" or shall it be automatically done via hprof predefined "y" range? Andrzej.
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