[ROOT] User defined function as a weight.

From: Dmitry A. Shtol (shtol@sndxt1.inp.nsk.su)
Date: Wed Aug 06 2003 - 06:36:57 MEST


I asked this question some time before, but didn't get answer. I need 
to use user defined function as a weight in TNtuple::Draw(). In PAW it 
looks like that:

app comis quit
    real function w(z,d,sig)
    real z,d,sig,s2
    s2=sqrt(2.)*sig
    w=0.5*(erf((z+d)/s2)-erf((z-d)/s2))
    end
quit

*************

nt/pro [id] [idn] el11 [cond]*w(z1m,10.,5.)

Where el11 and z1m are elements of ntuple.
What is the simplest way to do it in ROOT?

==============================================================
Dmitry A. Shtol                        (SND group)
Budker Institute of Nuclear Physics



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