Error on RMS90

Hi ,

thank you, Rene , for your reply.; it’s what I needed.

I have to make a fit now. How can I calculate the error on the RMS90?

Thank you very much


What do you want to do exactly? a fit with a gaussian? if yes, do

TF1 *g = new TF1("g","gaus",xmin,xmax); myhisto.Fit(g,"NR"); double errorSigma = g->GetParError(2);