I am trying to use RDataFrames in C++, but for some reason it does not exist in the ROOT namespace. More specifically in the sample code from the class reference neither EnableImplicitMT or RDataFrame can be found:
ROOT::EnableImplicitMT ROOT::RDataFrame auto myHisto = d.Histo1D("Branch_A"); myHisto->Draw();
I am not sure what I am doing wrong, and Googling the issue does not give me any results. Note that besides this, ROOT appears to work just fine. Can you guys tell me what is wrong? I am sorry if it is something trivial.