Christoph Ernst wrote:
>
> Hello,
>
> Is there a simple way to rescale the y-axis of a TH1 when you plot it from
> TTree::Draw()?
> For example I want to draw a pt spectrum via tree->Draw("pt"). But as
> 1/pt * dN/dpt not just as dN/dpt.
> Also, I would like to plot histos from a Tree where each entry has a
> specific weight w (something like dw/dx). In a loop I would simply say
> h1->Fill(x_i, w_i);.
> But I cannot figure out how to do this in the nice way of TTree::Draw().
> If TTree::Draw() can't do it, what do you think is the best alternative?
>
> Greetings
> Christoph
>
Hi Christoph,
The way I always do this is :
tree->Draw("pt","1.*1./pt")
--
Cheers,
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*----------------------------------------------------------------------*
Dr. Nick van Eijndhoven Department of Subatomic Physics
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