Re: [ROOT] Sum histogram

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Nov 29 2002 - 10:50:15 MET


Hi Giuseppe,

I have no problems in doing that.

Which version of Root are you using?

Could you send me your Root file?

Rene Brun

On Fri, 29 Nov 2002, [iso-8859-1] giuseppe.foggi@libero.it wrote:

> Hi rooters,
>  I try add histogram with the following command
>  
>  TFile f("CommonTotaleM.root") 
>  TH1F *h = (TH1F*)f.Get("BASE_ALL_M")  
>  h->Add(h)  
>  
>  but I get
>  *** Break *** segmentation violation        
>  
>  Why?
>  
>  If I try
>  
>  TFile f("CommonTotaleM.root") 
>  TH1F *h = (TH1F*)f.Get("BASE_ALL_M") 
>  h->Draw()  
>  
>  It displays my histogram, but if after I try to execute the following
>  command 
>  
>  h->Add(h)  
>  
>  I get 
>  Error: Symbol h is not defined in current scope 
>  FILE:/tmp/filensNVWl_cint LINE:1
>  *** Interpreter error recovered ***
>  
>  Why?
>  
>  
>  Thank you for your help.
>  Giuseppe.
>  
> 



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