I went to this page and tried t->SetEstimate(t->GetEntries()) and it won't
let me call GetEntries in the argument:
nevis1:emcal/calib> root -l
*******************************************
* *
* W E L C O M E to R O O T *
* *
* Version 2.20/06 17 December 1998 *
* *
* You are welcome to visit our Web site *
* http://root.cern.ch *
* *
*******************************************
CINT/ROOT C/C++ Interpreter version 5.13.83, Dec 2 1998
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] f = new TFile("emcBeam.root")
(class TFile*)0x0
root [1] f->ls()
TFile** emcBeam.root
TFile* emcBeam.root
KEY: TTree t;1 test beam data for timing studies
root [2] t->SetEstimate(t->GetEntries())
Error: No symbol t->GetEntries() in current scope FILE:/var/tmp/daaa006P_
LINE:1
*** Interpreter error recovered ***
root [3] int N = t->GetEntries()
root [4] t->SetEstimate(N)
root [5] .q
Is this something wierd that has been fixed in the newer versions of root?
> Hi Seng,
>
> your question is answered here:
>
> http://root.cern.ch/root/roottalk/roottalk99/0566.html
>
> Cheers, Fons.
>
>
>
> Woon-Seng Choong wrote:
> >
> > Hi,
> > I encountered a peculiar problem when using TTree::Draw. I have a tree
> > which has a variable, say var, which range from 2172 to 2179. There are
> > about 10 million events. I used the following command to plot the var:
> >
> > root [1] tree->Draw("var")
> >
> > What I got was a plot which range from 2171 to 2173 and has an overflow
> > over 8 million events. Why didn't it draw the whole range?
> > I am using ROOT v2.21/08.
> >
> > Seng
>
> --
> Org: CERN, European Laboratory for Particle Physics.
> Mail: 1211 Geneve 23, Switzerland
> E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
> WWW: http://root.cern.ch/~rdm/ Fax: +41 22 7677910
>
S t e p h e n M a r k a c s
stephen@phys.columbia.edu
http://phys.columbia.edu/~stephen/