Hi Emily, In your fit function that you specify to TH1::Fit, you can use an histogram and return the bin content corresponding to a given x. If you have a TH1 *h, do Int_t bin = h->GetXaxis()->FindBin(x); return h->GetBinContent(bin); //function return value Rene Brun Emily Nurse wrote: > > Hello, > I was just wandering if it possible to use the fit class to fit a > histogram to some experimental data points or does it have to be a > continuous function? Would I have to work chi-squared out point by point > in a programme? > Thanks for your time, > Emily.
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