Excluding a point from a fit

ROOT
1

Hello,

Is it possible to exclude a point from a fit? I’m just making a linear fit to ~10 data points, just with the simple pol1 function:

hist->Fit(“pol1”,"","",fit_min,fit_max);

In some of my histograms I have bad data points that I would like to exclude from the fit.

Thanks for any help,
Cheers,
Andrew

2

Only bins with a non-null error are taken into account in a fit.
Call TH1::SetBinError(bin,0); for the bins you want to exclude.
You can also excluse a range via TF1::RejectPoint
root.cern.ch/root/htmldoc/TF1.ht … ejectPoint

see an example in tutorial fitExclude.C

Rene