Re: bitmask operations in TTree::Draw()

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Jun 19 1998 - 08:52:43 MEST


Hi Steve,
Thanks for reporting this problem. Now fixed in the development
version. Will appear in 2.00/09.
The functionality as you described it below was already supported
by the formula compiler (class TFormula). I forgot to activate it
in the Tree formula evaluation (class TTreeFormula).

Rene Brun

Stephen Eichblatt wrote:
> 
> Hi,
> 
> i would like to do a bitmask operation on an integer in a TTree.
> 
> for example:
> 
> T.Draw("xyzD3 & 0x3ff")
> 
> where i want to see the lower 10 bits of the integer xyzD3.
> 
> Or even:
> 
> T.Draw("xyzD3 % 1024")
> 
> and
> 
> T.Draw("xyzD3 / 1024")
> 
> with their usual integer interpretations would be sufficient.
> 
> Any suggestions on how to do this?
> 
> Steve Eichblatt
> eichblatt@fnal.gov
> (630)840-4006



This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:34:34 MET