Hi Rene,
Thank you for the help.
Razzak
Instead of:
TH1F *Spher3D_sig = setA->Get("h_Sphericity3D"); Spher3D_sig->Draw();
do:
TH1F *Spher3D_sig = (TH1F*)setA->Get("h_Sphericity3D"); if(Spher3D_sig) Spher3D_sig->Draw();
Rene Brun
Meera Lebbai, Mohamed R. wrote:
> Hi all,
>
> I am getting illegal pointer error when I try Draw() a histogram ( but I never used to get this before).
>
> I have just included a simple file
>
>
> // test.C
>
>
> { gStyle->SetOptFit(111111);
>
> // signal
> TFile* setA = TFile::Open("hist_stop_sig.root");
>
> TH1F *Spher3D_sig = setA->Get("h_Sphericity3D");
> Spher3D_sig->Draw();
> }
>
> Any help will be appreciated.
>
> Razzak
>
>
Received on Fri Oct 26 2007 - 17:18:13 CEST
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