Hi Til, Eddy, Fitting and access to the fit results is described in the Users Guide. I have added more information also to: http://root.cern.ch/root/htmldoc/TH1.html#TH1:Fit http://root.cern.ch/root/htmldoc/TGraph.html#TGraph:Fit Rene Brun Eddy Offermann wrote: > > Til, > > Something along the following lines: > > histo->Fit("myfunc"); > TF1 *f = histo->GetFunction("myfunc"); > Double_t chi2 = f->GetChisquare(); > > > > > > > Hi, > > > > doing a simple fit with histo->fit() I would like to access the value of > > the chi2 afterwards. If I have understood right this is just the value > > printed onto the screen as FCN=... in the case of the default chi2 > > fit, so in principle this piece of information is there. Is there any > > method to access it or do I have to calculate it on my own from the data > > points and the fit params? > > > > Thanks in advance, > > > > Til > > > >
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