Dear friends, In ROOT I have 3 histos (1 dimensional), h1, h2 and h3. h1 I fit with some function f and now I would like to subtract h3 from h2 in which I weight each bin of h3 with the function value of f in that bin. I.e. result= h3 - f(x)*h2. Could anyone of you tell me the most effective (c.q. elegant) way to do this, such that I don't have to change all the code when changing the function f ? Thanks in advance, Nick. *----------------------------------------------------------------------* Dr. Nick van Eijndhoven Department of Subatomic Physics email : nick@fys.ruu.nl Utrecht University / NIKHEF tel. +31-30-2532331 (direct) P.O. Box 80.000 tel. +31-30-2531492 (secr.) NL-3508 TA Utrecht fax. +31-30-2518689 The Netherlands WWW : http://www.fys.ruu.nl/~nick Office : Ornstein lab. 172 ---------------------------------------------------------------------- tel. +41-22-7679751 (direct) CERN PPE Division / ALICE exp. tel. +41-22-7675857 (secr.) CH-1211 Geneva 23 fax. +41-22-7679480 Switzerland CERN beep : 13+7294 Office : B 160 1-012 *----------------------------------------------------------------------*
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