Re: [ROOT] TH1::SetDrawOption

From: Dmitry A. Shtol (shtol@sndxt1.inp.nsk.su)
Date: Fri Apr 30 2004 - 07:17:12 MEST


This histogram is not from disk file. It is generated in root as the result
of processing of TTree.

==============================================================
Dmitry A. Shtol                        (SND group)
Budker Institute of Nuclear Physics

On Thu, 29 Apr 2004, Rene Brun wrote something very interesting:

> Hi Dmitry,
> 
> I suspect that you click in the browser pane on myhist;1. This is the version
> that is always taken from the disk file. So calling SetDrawoption will have no
> effect. You have to import the object in memory and set the option on this
> object.
> It is a bit tricky to do this from the browser: click on "myhist;1" first,
> then go the left pane, double click on "ROOT files" and again on the file name,
> Then select SetDrawOption on the object "myhist" and not "myhist;1
> You can do it also from the command line.
> 
> Rene Brun
> 
> 
> "Dmitry A. Shtol" wrote:
> > 
> > Hi!
> > I set histogram draw option by TH1::SetDrawOption("....."); (option is
> > "hist e", for example). But when I draw histogram by TH1::Draw() (or by click
> > in browser), option is not used and after drawing TH1::GetDrawOption()
> > returns "". Why? What should I do to draw histogram
> > through the browser with option what I need ?
> > 
> > ==============================================================
> > Dmitry A. Shtol                        (SND group)
> > Budker Institute of Nuclear Physics
> 



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