Hi Jayoung,
See examples at $ROOTSYS/tutorials/tree1.C, tree2.C, etc
You can also do:
pos->Scan("evt:x:y","x==y");
Rene Brun
On Wed, 15 May 2002, Jayoung Wu wrote:
> HI all.
>
> I have created a ntuple,
> TNtuple *pos = new TNtuple("pos","Position","evt:x:y")
> It's filled by my code.
>
> Is there any way I can extract the value?
> For example,
> I want get and save the values of evt, x, and y when x==y.
>
>
> ---
> Thanks,
> Jayoung
>
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