Re: TTree->Draw() with interpreted function

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Hi Juergen,
Currently you cannot invoke a user function in TTree::Draw. You have to
implement the loop yourself.
We did not want to encourage people this way in view of the future
extensions
foreseen for PROOF (Parallel Root).

Rene Brun


Juergen Hannappel wrote:
> 
> Hello,
> i want to draw TTrees, like i ntuple/plot with paw, and i want to use
> an interpreted function on the tree data, or at least on a subset of
> them. But root does not recognize the function in the varexp or
> selection parameters of TTree->Draw();
> Is this impossible (so that i have to employ my own event loop, where
> it does work) or am i doing something stupid?
> 
> Greetings,
>         Juergen
> 
> --
> Dr. Juergen Hannappel  Office: W148 Phone: +49 228 73 2447  FAX +49 228 73 7869
> mailto:hannappe@lisa2.physik.uni-bonn.de   Physikalisches Institut der Uni Bonn
> http://lisa2.physik.uni-bonn.de/~hannappe   Nussallee 12, D-53115 Bonn, Germany
> CERN: Phone: +412276 76461 Fax: 77930 Bat. 892-R-A13 F-01631 CERN CEDEX, France

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