Function in AddVariable

[testa]

_ROOT Version: 6.04
_Platform: MacOC El Capitan 10.11.4
_Compiler:Apple LLVM version 7.3.0 (clang-703.0.31)

Dear experts,
I would like to use a delta phi function in
factory->AddVariable("deltaphi::… ") starting from px,py components.
Is it possible to use a function inside “factory->AddVariable” ?
If yes, are there some examples ?
Best, Marianna.

[bellenot]

Maybe you can fine something useful by searching the forum, otherwise maybe @moneta can help you

[moneta]

Hi,
Using the example provided here

DeltaPhi?

Hi, I just disovered another awesome feature of my favorite function TTree::Draw(), namely that it can interpret calls to TMath functions! I can’t find any TMath::DeltaPhi(phi1,phi2) TMath::DeltaR(…) functions though, which would be very useful to me in this context. Maybe these functions exist some place else though such that they can be interpreted as part of a TTree::Draw() selection? Thanks, Philipp

You can define your DeltaPhi function and then use in DataLoader::AddVariable as you would use in TTree::Draw

Lorenzo