[Ifeffit] Reporting the fitting data (uncertainty associated with N)

Dear All, I have seen and also been told by few professors that when you report the fitting you must report the uncertainty associated with the measurement as evaluated by the program used for the fitting. Now, When I do the fitting I typically get the +/- values for E0, delR, ss and

Re: [Ifeffit] Reporting the fitting data (uncertainty associated with N)

The amplitude parameter is N*S02, so that S02 and N are completely correlated. If you set N = 2 guess S02 = 0.8 and the fit returns S02 = 0.75 +/- 0.05 Then the correct interpretation is that N*S02 = 2*(0.75 +/- 0.05) = 1.5 +/- 0.10 If you had asserted that S02 = 0.75 and

Re: [Ifeffit] Reporting the fitting data (uncertainty associated with N)

Dear Matt, Thank you very much for the quick and illustrative solution. That helped Pushkar On Tue, Nov 4, 2014 at 9:24 PM, Matt Newville newvi...@cars.uchicago.edu wrote: The amplitude parameter is N*S02, so that S02 and N are completely correlated. If you set N = 2