Hello, You can have a look on the exemple "multifit.C" http://root.cern.ch/root/html/examples/multifit.C.html Look at the lines : g1->GetParameters(&par[0]); g2->GetParameters(&par[3]); g3->GetParameters(&par[6]); look at GetParameter and GetParameters in http://root.cern.ch/root/html/TFormula.h. Double_t TFormula::GetParameter(Int_t ipar) will let you get one parameter, eg : Double_t mean = fit->GetParameter(1); And void GetParameters(Double_t* params) will gives you every parameter in an array. Hope it helps, Yannick _/ Yannick Patois \_________________ Address (home) __________________ | irc(undernet): Garp on #france25+ | La Villa des Sciences | | email : patois@ganil.fr | 12, avenue de Cambridge | | web :http://www.sura.org/~patois/ | 14200 Herouville-Saint-Clair | | Tel(home) :+33 02 31 94 50 32 | FRANCE | |___________________________________|__________________________________| On Mon, 5 Jul 1999, Stephen Markacs wrote: > > How do I get the mean and sigma from a fit? I know it prints them to the > root session, but I want to actually get at them within my code so I can > put them on my plot. > > Thanks. > > S t e p h e n M a r k a c s > stephen@phys.columbia.edu > http://phys.columbia.edu/~stephen/ > >
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