Fitting more than 2000 root histos

[Danilo]

This question was answered already when you were still using the landau model.

To improve Landau fit

Hi everyone, I would like to apply the best fit to the attached plot and as you can see the X^2/NDF values are so high. However, I could not find solution. Should I change parameters or define new function include gaus+landau? Because I have nearly 1000 plots like this and I want to do this with using macro not with GUI. If someone could help me, I would appreciate. Thank you very much [image] [image]

The answer still applies.