existing post: Flatten multi-dimensional array in rDataframe - #9 by SiewYan
the ticket: https://its.cern.ch/jira/browse/ROOT-9509
my example input file: CERNBox
existing post: Flatten multi-dimensional array in rDataframe - #9 by SiewYan
the ticket: https://its.cern.ch/jira/browse/ROOT-9509
my example input file: CERNBox