I have the following problem.
I have a variable x in a tree T.
I need to create a RooDataSet Data in which I would need to include the logarithm of x, instead of x.
If I want to include x, I would write:
RooArgSet arg(x,…other variables…)
where “x” is exactly the name of the variable stored in T. But I need Log(x)!
How can I proceed?