[ROOT] Getting Hists within Pads from a stored Canvas

From: Florian Schopper (fls@ipp.mpg.de)
Date: Tue Jan 23 2001 - 13:28:51 MET 

Hello Rooters,

I ran into problems to retrieve Histograms from Canvases which 
seem to have been subdivided into Pads (although there is only one
pad shown in that Canvas) before they were stored. 
When I open the .root File and draw the Canvas, the Object browser shows
that there is a Canvas which contains a Pad which contains a TH1F.

Calling 
myHist = ((TH1F*)  myCanvas->GetPrimitive("# of Hits") );
doesn`t work (probably because there is the TPad inbetween).

Calling   
 myCanvas->GetPadSave()->ls() shows 

Canvas Name=2 Title=venus Option=
 TCanvas fXlowNDC=0 fYlowNDC=0 fWNDC=1 fHNDC=1 Name= 2 Title= venus Option=
  TPad fXlowNDC=0 fYlowNDC=0 fWNDC=1 fHNDC=1 Name= Pad Title= This is a pad
   TFrame X1= 100.000000 Y1=0.000000 X2=1500.000000 Y2=758.100000
   OBJ: TH1F    # of Hits       venus Energy Spektrum  : 0  

Is there a way to find out what function I would have to call to get 
acess to the Histogram?

     thanks

            Florian Schopper

p.s. Sorry for the long mail 

----------------------------------------------------------------------
Florian Schopper 
office: Max-Planck-Institut fuer
extraterrestrische Physik Ludwig-Merk str. 3 Postfach 1312 80805 Muenchen
Giessenbachstr. Germany 85741 Garching, Germany
phone: 49/89/32455680                        phone: 49/89/30000 3625
                                               fax: 49/89/3299 3569

                     e-mail: fls@mpe.mpg.de
       http://www.gamma.mpe-garching.mpg.de/MEGA/mega.html 
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