Reading leaf of fixed-size array from TTree using TTreeReader

[Wile_E_Coyote]

RDataFrame functionality missing

I wanted to encourage someone to try RDataFrame but I found it dies like crazy on simple trees (ROOT 6.28/02). These trees contain branches that are ordinary variables, simple arrays (fixed and variable size), and “split” and “unsplit” objects of some user’s classes. Using TFile::MakeProject, I generate and load dictionaries for all “nonstandard” classes. I then try to dump the available column names and types … that’s where RDataFrame breaks. One tree: what(): TTree leaf V.V has both a le…