Re: bitmask operations in TTree::Draw()

Rene Brun (Rene.Brun@cern.ch)
Fri, 19 Jun 1998 08:52:43 +0200

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