Re: [ROOT] Coordinates of minimum bin in the TH2F,

From: Rene Brun (brun@pcbrun.cern.ch)
Date: Sat Oct 09 2004 - 05:03:30 MEST 

Tomasz,

if binx,biny,binz are the bin numbers corresponding to the histo 
min/maximum, you can translate the bin number to histogram coordinates 
with
  double x = h->GetXaxis()->GetBinCenter(binx); //for TH1, TH2 or TH3
  double y = h->GetYaxis()->GetBinCenter(biny); //for TH2 or TH3
  double z = h->GetZaxis()->GetBinCenter(binz); //for TH3

Rene Brun


On Fri, 8 Oct 
2004, Tomasz 
Bold wrote:

> Hi,
> 	As in subject. I want to plot marker in the position where
> maximum/minum bins of 2D histo are located.
> I know GetMinimumBin(x,y,z);
> But to plot the marker I need to translate x,y(bins) to coordinates of the
> histogram and this is accualy my question. Any idea?
> I can loop over bins but I suspect there is smarter trick.
> 
> Regards,
> 	Tomasz Bold
> 
> --------------------------------------
> Tomasz Bold
> mail me:
> bold@ftj.agh.edu.pl,
> Tomasz.Bold@cern.ch
> Tomasz.Bold@desy.de
> or call:
> +48 12 617 4729 (AGH)
> +48 12 662 8023 (IFJ)
> -------------------------------------
>

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