No,
<Draw "a" if b is non-zero> is obtained with:
ntuple->Draw("a","b!=0")
ntuple->Draw("a","b") will histogram "a" with a weight "b"
See the doc of TTree::Draw discussing this example.
http://root.cern.ch/root/htmldoc/TTree.html#TTree:Draw
Rene Brun
On Fri, 5 Apr 2002, Ahmet Sedat Ayan wrote:
>
>
> Hi Rooters,
>
> What is meaning of the following if we have an ntuple with variables, a,
> b, c,.. etc ? Can I take it as <<Draw "a" if b is non-zero>> ?
>
> ntuple->Draw("a","b")
>
> cheers,
> ahmet
>
> ***************
>
> Ahmet Sedat Ayan
>
> Physics & Astronomy Dept.
> Van Allen Hall
> University of Iowa
> Iowa City, IA, 52242
>
> Voice : (++ 1 319) 335-1941 (W) (GMT-6)
> Occupation : Ph.D Candidate (But still dreamer!)
> e-mail : ayan@cms.physics.uiowa.edu
> web : http://jazz.physics.uiowa.edu/~ayan
>
>
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