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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