[ROOT] Clone objet

From: Christophe Suire (suire@in2p3.fr)
Date: Thu Jun 15 2000 - 18:34:03 MEST


Hi,

Here is my problem :
I just want to get back some TH1F   from a file  and copy them into new fHistos
which are data members of a class.
Of course when I close the file I get a seg. vio.  if  I try to use my fHistos


I want to do something like this...

{
gROOT->Reset();
TObjArray *my_array = new TObjArray(10);

TH1F *my_th;
TH1F *t0;

TFile *my_file = new TFile("my_file.root","READ");

t0  =     DO A COPY    OF      [   (TH1F*)   my_file->Get("histo_name")    ] ;

my_array->AddAt( t0,0);

my_file->Close();

my_array->ls();

my_array->At(0)->Draw();               }






-------------------------------------------------------------
Christophe Suire      B204            suire@in2p3.fr
Institut de Recherches Subatomiques   phone: +33(0)388106154
23,rue du Loess Bat20 BP28            fax:   +33(0)388106614
F-67037 Strasbourg cedex2
-------------------------------------------------------------



This archive was generated by hypermail 2b29 : Tue Jan 02 2001 - 11:50:27 MET