[Ifeffit] statistics
Stefano Ciurli
stefano.ciurli at unibo.it
Tue Aug 24 05:15:54 CDT 2004
Hello folks,
I am sure this is an easy question answered many times, but I need
some refresh:
When it comes down to compare fits using different models, which is
the relevant parameter? Chi square (and reduced) or R-factor? I have
fits with smaller chi square and larger Rfactor and viceversa...
Is it possible that a rationale would be that when the models to
compare have the same number of atoms these parameters go in
parallel? And that when the number of atoms is different one must
rely more on chi square rather than R-factor (or viceversa)?
Oh well.
Stefano
--
____________________________________________
Stefano Ciurli
Professor of Chemistry
Department of Agro-Environmental Science and Technology
University of Bologna
Viale Giuseppe Fanin, 40
I-40127 Bologna
Italy
Phone: +39-051-209-6204
Fax: +39-051-209-6203
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ma per seguir virtute e canoscenza"
Dante Alighieri - Inferno - Canto XXVI
"Ihr seid bestimmt, nicht Tieren gleich zu leben,
Nein, Tugend zu erringen und Erkenntnis"
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