RE: [ROOT] bit shift in TTree::Draw

From: Philippe Canal (pcanal@popgtw.fnal.gov)
Date: Thu Nov 02 2000 - 00:07:05 MET

Next message: Jeffrey Reid: "[ROOT] Reading Multiple Files Bug?"
Previous message: Stephen Bailey: "[ROOT] Rotated 1D Histograms?"
In reply to: steve udriot: "[ROOT] bit shift in TTree::Draw"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi,

In TTree::Draw, >> has a special meaning, namely piping of the result to
an histogram or TEventList named after the operator  [ T->Draw("x:y>>hxy") ]

So the 'bit shift' operator is not supported.

Philippe.

> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
> [mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of steve udriot
> Sent: Wednesday, November 01, 2000 5:12 AM
> To: roottalk@pcroot.cern.ch
> Subject: [ROOT] bit shift in TTree::Draw
> 
> 
> Hi rooters,
> 
> I am doing the following thing :
> 
> root [0] gSystem->Load("./libEvent.so");                 
> root [1] TFile *f = TFile::Open("rfio:p37050.root")      
> root [2] T->Draw("(cristal_0.GetSample(0)&0x3000)>>12")  
> <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
> root [3] T->Draw("((cristal_0.GetSample(0)&0x3000)>>12)")
> 
> *ERROR 41 : 
>  ')' is expected
> root [4]
> 
> At root[2] I am expecting 2 and I get 4092 ?
> At root[3] it doesn't recognize the parenthesis ?
> 
> How does the bit shift works with TTree::Draw ?
> 
> Thanks!
> 
> Steve
> 
> 
>

Next message: Jeffrey Reid: "[ROOT] Reading Multiple Files Bug?"
Previous message: Stephen Bailey: "[ROOT] Rotated 1D Histograms?"
In reply to: steve udriot: "[ROOT] bit shift in TTree::Draw"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Tue Jan 02 2001 - 11:50:36 MET