Hi Arache, see $ROOTSYS/tutorials/fithist.C for an example of fit of a histogram + function. You can adapt it to the sum of histograms. Rene Brun On Wed, 28 May 2003, Arache Djannati-Atai wrote: > > Hi rooters, > Is there a simple way of fitting a user defined function to > several histograms at the same time? The problem is rather usual : I try > to fit some parameters using several observations summarized in different > histograms (that may not be compiled: e.g. fitting the parameters of a > resonance using several channels). > Of course, what one would do in a non-object-oriented framework is just to > fetch data from all histograms into arrays and fit them... > Thanks, > Arache > > ======================================================================= > > Arache Djannati-Atai > Astroparticle Group | tel: +33 1-44271478 > PCC - College de France | fax: +33 1-43546989 > 11, Place Marcelin Berthelot > 75231 Paris Cedex 05 | e-mail: djannati@in2p3.fr > > >
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