How to get the parameter error?

Hi,

I’m fitting a histogram with Gaussian function.Now I have get the mean value using the GetParameters method.And I want to know how to get the error of mean.Thanks!

see doc of TH1::Fit and look at section "Getting fit results"
root.cern.ch/root/html/TH1.html#TH1:Fit

Rene

[quote=“brun”]see doc of TH1::Fit and look at section "Getting fit results"
root.cern.ch/root/html/TH1.html#TH1:Fit

Rene[/quote]
Thanks for your help!