Hy Cyril,
If you do:
chain->Draw("var1","var2","e1")
This will histogram the variable "var1" with weight "var2". The resulting
histogram will have errors bars correctly computed and drawn.
Rene Brun
Cyril Lachaud wrote:
>
> Hi all,
> there is no way to actually Draw directly an histo with Error bars coming
> from the same Tree by something like
> TChain->Draw("var1:var2","ErrorVar1:ErrorVar2",...) method ?
>
> Is there a way to avoid the other way (adressing branch and all that) ?
>
> Cyril
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