How to get the statistical error in rootfit?

I am using the chi2 fit of ROOT, and get the value and error of every parameters as well as chi2/ndf.
How could I get the statistical error of my fitting?
Thank you very much!

Cheers,
Amy

Hi

The parameter error returned from the fit (from TF1::GetParError(i) or TFitResult::Error(i) is the statistical error for the i-th fit parameter

Lorenzo

[quote=“moneta”]Hi

The parameter error returned from the fit (from TF1::GetParError(i) or TFitResult::Error(i) is the statistical error for the i-th fit parameter

Lorenzo[/quote]
Sorry for my very very late reply.
Thank you!