Re: [ROOT] Tree->Draw bug?

From: Rene Brun (Rene.Brun@cern.ch)
Date: Tue Aug 28 2001 - 22:06:13 MEST


Hi Kirill,
   
I looked at your Tree. Your branch "MWPC" has leaves
with names that are numbers. See Print below
As a result, the expression "Left.Tdc/2" is correctly taken by ROOT
as the division of the leaf "Left.Tdc" by the leaf "2" in the branch
"MWPC"
   
*Br    0 :Header    : EventNumber/I:EventSize:SubEventSize:Trigger
*Br    1 :Forward   : Tdc/I:Qdc
*Br    2 :Left      : Tdc/I:Qdc
*Br    3 :Right     : Tdc/I:Qdc
*Br    4 :Pmt       : Tdc/I:Qdc:Scaler:Norm 
*Br    5 :MWPC      : 1/I:2:3:4:5:6:7:8
*Br    6 :Additional : QdcCalo/I:QdcCher1:QdcCher2:QdcPmtUp:QdcPmtDown

I am not sure what we should do in this case. Change the names of your
leaves
in the branch "MWPC".

Rene Brun



On Tue, 28 Aug 2001, Kirill Shileev wrote:

> Hello rooters,
> I've notice that 
> Tree->Draw("Left.Tdc/2") gives wrong result while
> Tree->Draw("Left.Tdc*0.5) works fine.
> I use 3.01.06 from cvs as of mid August on Linux box.
> 
> Regards, Kirill
> 



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