I am really stuck, I have a file called data.C with data points and I need to make a least-squares fit from pol0 to pol6 of it does anyone know how to do this?
Hi,
To read points from a file, you can look here
https://root.cern.ch/root/htmldoc/guides/primer/ROOTPrimer.html#read-graph-points-from-file
and then you call the TGraph::Fit function, looking at some of the fit tutorials
Lorenzo
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