RDataFrame Constructor from a TChain

ROOT
1

Hi,

We are starting to convert some our analysis tool to using RDataFrame, but without rewriting everything. We quickly ran into an issue that we are passing TChain* around to which RDataFrame does not have a constructor. Are there plans to remedy this? Any suggestions on how to construct an RDataFrame from the TChain* by getting a list of files or something along those lines in the meantime?

Thanks

ROOT Version: 6.14.04

2

Hi,
RDataFrame has a constructor that takes a TTree&, to which you can safely pass a TChain& as TChain inherits from TTree.

Looking forward to hear how RDF works for your usecase!
Cheers,
Enrico

3

Ahh, sorry I read the signature wrong and missed that we needed to dereference the pointer.

auto df = ROOT::RDataFrame(*chainPtr);

Thanks for the quick response.

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