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Re: Expressions for R factors

  • To: Multiple recipients of list <coredmg@iucr.org>
  • Subject: Re: Expressions for R factors
  • From: Howard Flack <Howard.Flack@cryst.unige.ch>
  • Date: Mon, 7 Sep 1998 09:15:53 +0100 (BST)
> 
> Have we simply introduced a typo into later versions?
  
  Yes and it is not the only one. What are all of those absolute value
signs in there for? Y is defined as |F|, |F|^2^ or I, so all of the |s
seem totally unnecessary.




                    ( sum ( w ( Y(obs) - Y(calc) )^2^ ) )^1/2^
               wR = ( --------------------------------- )
                    (         sum ( w Y(calc)^2^ )      )


H.

-- 
Howard Flack        http://www.unige.ch/crystal/ahdf/Howard.Flack.html
Laboratoire de Cristallographie               Phone: 41 (22) 702 62 49
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