[Ifeffit] Query regarding error bars

Bindu R. binduiuc at yahoo.co.in
Fri Jan 9 08:12:16 CST 2009

Hi all,


Could any tell me in a simple language about the error bars
returned by the EXAFS fitting program?


     do they exactly represent?How is
     it determined?How is
     the number of iterations decided.In
     addition to R-factor what are the other parameters which determines a good
     fit.For a
     R-factor ~0.001, if the value of chi2~10,000
     and reduced chi2 ~ 500, can one consider the fit to be good even if one gets a good match
     to the experimental spectra.


Dr.Bindu R.

Visiting Fellow



Tata Institute of Fundamental Research

Homi Bhabha Road


Mumbai-400 005


Contact Number

Lab- 022-2278 2256, 022-2278 2671


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