[ROOT] copy an object from a directory in another

From: Georges Lobo (lobo@irmm.jrc.be)
Date: Mon Jul 30 2001 - 17:37:50 MEST 

Hi rooters,
I have a simple question. I would like to know if there is a simple way to
copy an object in a subdirectory into another. Like the unix commamnd 
cp dir1/file dir2/file ?
To give more details I would just like to take some histograms from some
directory and make the sum of the histos into an another dir ?
To explain better here is my problem 
I have a fiile with 3 directory 
root [11] db->ls();
TFile**         /home/lobo/Th232/th232_c2.root
 TFile*         /home/lobo/Th232/th232_c2.root
  KEY: TDirectory       runf1;1 runf1
  KEY: TDirectory       runf2;1 runf2
  KEY: TDirectory       runf3;1 runf3
  KEY: TDirectory       runf4;1 runf4
  KEY: TDirectory       runf5;1 runf5
  KEY: TDirectory       runf6;1 runf6
  KEY: TDirectory       Flux;1  Flux 
root [15] runf1->ls();
 KEY: TH1F      h302en;1        TOF Total Spectrum both adc lithium in
Energy
 KEY: TH1F      h303en;1        TOF Total Spectrum both adc alpha in
Energy
 KEY: TH1F      h109en;1        TOF Total Spectrum ADC 1 alpha lithium in
Energy
 KEY: TH1F      h209en;1        TOF Total Spectrum ADC 2 alpha lithium in
Energy                

All the directory starting by runf* have the same structures

What I would like is to store the sum of histos h302en the first 3 runs in
the directory Flux ?
Thank you very much

This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:53 MET