Re: TPaveStats

Chiara,

In your macro, after

    hTimeCorr->Draw();
add the statement:
  cTimeCorr->Update();

Rene Brun

On Thu, 22 Dec 2005, chiara zampolli wrote:

> Dear rooters,
>
> I am trying to retrieve the statistics box from an histogram, but with no
> success. I am doing that in a macro, which reads:
>
> cTimeCorr->cd(j+1);
> //gStyle->SetOptFit(111);
> hTimeCorr->Draw(); cout << " ------------------------------------" <<
> endl;
> cout << " ------------------ STATS ------------------" << endl;
> cout << " ------------------------------------" << endl;
> TPaveStats *sta =
> (TPaveStats*)hTimeCorr->GetListOfFunctions()->FindObject("stats");
> cout << " sta = " << sta << endl;
> cout << " sta = " << endl;
>
> and the output says that sta=0 (and it is astonishing also the fact that this
> is written only in case the "nonsense" line
>
> cout << " sta = " << endl;
>
> is present (btw, the histo is drawn in a correct way).
> Another strange thing is that when trying to do the same in a root session,
> everything works:
>
> root [1] TH1F * h1 = new TH1F("h1","h1",10,0,10)
> root [2] for (Int_t i=1;i<=10;i++) h1->SetBinContent(i,i+3);
> root [3] h1->Fit("pol1")
> Fitting results:
> Parameters:
> NO. VALUE ERROR
> 0 3.500000 1.474989
> 1 1.000000 0.304998
> (Int_t)0
> root [4] h1->Draw()
> root [5] TPaveStats *sta =
> (TPaveStats*)h1->GetListOfFunctions()->FindObject("$
> root [6] cout << " sta = " << sta << endl;
> sta = 0xa1a5a08
> root [7]
>
> Perhaps I miss something... Could you help me?
> Thank you in advance,
> Best Regards and Merry Christmas,
> chiara
>
Received on Thu Dec 22 2005 - 11:05:55 MET