Hallo, I want to do the following job and wondered if there is already something foreseen with ROOT. I have a histogram i1 and another histogram i2 with a fit. Now I'd like to subtract the function of histogram i2 from the contents of histogram i1, i.e. I want to subtract a fitted background from data. Does anyone know a simple solution (despite from copying the function manually bin by bin in a new histogram i3). Thanks in advance and best regards, Volker Hejny -- Volker Hejny Tel: 02461/616853 ** Institut f. Kernphysik Fax: 02461/613930 ** ---------------------------------------------------------------- ** ** --- Forschungszentrum Juelich GmbH, D-52425 Juelich **
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