[ROOT] setting the displayed title of a histogram

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Hello,
  
I would like to create a histogram using TTree::Draw() and then
change the title:

The following code snipped does not display "My title"

   TTree *pT = pointer to a tree

   pT->Draw("a:b>>hnew(100,0.,10.,100,0.,20.)"); 
   TH2F *hnew = (TH2F *)gDirctory->Get("hnew");
   hnew->SetTitle("My title");

It does not change the title.  hnew->GetTitle() returns "My title", but
I can't seem to get it to display.

I'm guided here by the following does which does display "My title":

   pT->Draw("a:b")
   TH1F *htemp = gPad->Get("htemp")
   htem->SetTitle("My title")

I am using win32 version of root 3.05/3 on Win2k.  Thanks

Ed Oltman

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