Hi Dmitry,
The SetDrawOption changes only the draw option of an object already drawn
in the current pad.
It does not change the internal state of the object itself.
The same object may be drawn in pad1 with option1 and in pad2 with option2.
For TH1 objects, you should use TH1::SetOption to set the option in
the object itself. This will become the default option when drawing
the histogram.
Rene Brun
"Dmitry A. Shtol" wrote:
>
> Exp11 is a histogram TH1F
>
> root [181] Exp11->SetDrawOption("hist e")
> root [182] Exp11->Draw()
> root [183] Exp11->GetDrawOption()
> (const Option_t* 0x5b542c)""
>
> Histogam draws without option "hist e"
>
> ==============================================================
> Dmitry A. Shtol (SND group)
> Budker Institute of Nuclear Physics
>
> On Fri, 30 Apr 2004, Rene Brun wrote something very interesting:
>
> > Dmitry,
> >
> > I cannot reproduce this problem. Please give more details
> >
> > Rene Brun
> >
> > "Dmitry A. Shtol" wrote:
> > >
> > > 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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