weight in TH1F from Tree

Dear developpers,

Imagine that I have a simple tree (T3) with "sene" and "snumu" as variable. I would like to produce a 1D histo with "sene" weighted by "snumu". Up to now there is no problem.
Now, I would like to rescale the weight with a SCALE factor, I have tried

 const double SCALE = 0.3464e-12/1.e-6; //To rescale Old Flux format to Opti Flux
  T3.Draw("sene>>h222(501,0.01604,2.00396)","snumu*SCALE*(sene<1.5)");

But ROOT give me this error message:

*ERROR 30 :
 Bad numerical expression : "SCALE"

what can I do?

NB: I have not done snumu%sene has I would like to impose the binning via the histo definition...

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Received on Fri May 20 2005 - 11:32:46 MEST