Re: [ROOT] TTree question

From: payman hosseini (phossein@midway.uchicago.edu)
Date: Thu Nov 14 2002 - 23:28:33 MET


hi
Double_t x_arr=tree->GetV1();
gives the x axis


if i understand correctly, tree->GetSelectedRows() returns the total
number of count

i want the individual count for each elemet of the x_arr

thank you



Paymon Hosseini

On Thu, 14 Nov 2002, Rene Brun wrote:

> Hi,
> 
> use tree->GetSelectedRows().
> Also the return value of tree->Draw
> 
> Rene Brun
> 
> On Thu, 14 Nov 2002, payman hosseini wrote:
> 
> > hi
> > thank you for your help
> > i have another question
> > 
> > 
> > assume i have 
> > tree->Draw(branch1)
> > 
> > Double_t x_arr=tree->GetV1();
> > gives the x axis
> > 
> > how can i get the counts for each of the elements in the x_arr?
> > 
> > thank you very much
> > 
> > 
> > Paymon Hosseini
> > 
> > On Thu, 14 Nov 2002, Rene Brun wrote:
> > 
> > > I do not understand your question. Please explain better what
> > > you want to do. If you are new to Root, I suggest to read the
> > > examples at $ROOTSYS/test/tree0,1,2,3,4.C
> > > 
> > l> Rene Brun
> > > 
> > > On Wed, 13 Nov 2002, payman hosseini wrote:
> > > 
> > > > 
> > > > hi
> > > > 
> > > > asuume one has the following tree
> > > > 
> > > > branch1		branch2	
> > > > 1		0
> > > > 1		1
> > > > 2		0
> > > > 2		1
> > > > 3		0
> > > > 3		1
> > > > 
> > > > is there an easy way to break up this tree, so one will have the following
> > > > 
> > > > branch1		branch2		branch3		
> > > > 1	0	2	0	3	0
> > > > 1	1	2	1	3	1
> > > > 
> > > > 
> > > > 
> > > > thanks
> > > > 
> > > > paymon hosseini
> > > > 
> > > 
> > 
> 



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