[ROOT] Re: quick question

From: Rene Brun (Rene.Brun@cern.ch)
Date: Thu Nov 28 2002 - 18:29:46 MET


Hi Dan,

You can do
  double phioffset3 = l_phioffset->GetValue(3);
or
  double *phioffset = (double*)l_phioffset->GetValuepointer();
  and then access pihioffset[3];

Rene Brun

On Thu, 28 Nov 2002, Daniel Holmes wrote:

> thanks Rene,
> 
> How do i change the code below so i can read a 2-D, array.. i can plot :
> t->Draw("phioffset[3]"); using the "phioffset" leaf.
> 
> cheers,
> 
> Dan.
> 
> 
> > With your example, you can do
> >   TLeaf *l_phioffset = t->GetLeaf(("phioffset");
> >   l_phioffset->GetBranch()->GetEntry(5); //to read entry 5
> >   double phioffset = l_phioffset->GetValue();
> > 
> > Rene Brun
> > 
> 
> 



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