GetParError- How is error calculated?

ROOT
1

Hello,

I’d like to know what is actually happening when I do f1->GetParError.

How is the error calculated?

(f1 is a Gaussian fit)

Thanks

Lily

2

TF1::GetParError simply returns the result of what was store in the object, typically by a fit operation. You can compare this result with the errors computed by the fit immediatly after the fit operation.
TF1 keeps this information permanently when the object is written to a file.

Rene