Hi Niels,
You can produce an ascii file directly with
tree.Scan("var1:var2","some selection"); >subtree.dat
or create a new Tree with the subsets. See an example in tutorial
$ROOTSYS/tutorials/copytree3.C
Rene Brun
Niels Madsen wrote:
>
> Dear Rooters,
>
> I have an ntuple and I wish to output a simple list (ascii file) with
> two of it's
> parameters, applying a specific cut. Does anyone know how to do this ?
> I presume that one way would be to generate a second ntuple with the
> cut applied and run though this ntuple - but I can't figure out how to
> do
> that ???
>
> Thanks,
> Niels Madsen
>
> -----------------------------------------
> Dr. Niels Madsen
> Department of Physics
> University of Aarhus
> DK-8000 Aarhus C
> Denmark
>
> Stationed at :
> CERN - PH/UAD - 545-R-018
> CH-1211 Geneva 23
> Switzerland
> Tel. +41 22 767 2387 Fax. +41 22 767 8955
> Lab. +41 22 767 9814 Mob. +41 76 487 0835
>
>
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