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Royston's V' and v' functions

To: s-news@lists.biostat.wustl.edu
Subject: Royston's V' and v' functions
From: Ralph Henderson <caralph@sympatico.ca>
Date: Tue, 30 Aug 2005 08:24:08 -0400
Dear S-list readers:

Royston described the effect of sample size on the p-value obtained from the Shapiro-Francia test (Estimating departure from normality.  Stat  Med 1991;10:1283-93).  He developed two indices from the Shapiro-Francia test  (i) V'   -  an index of departure from normality and (ii) v'  -  a plot of the cumulative squared residuals. 

He mentioned the availability (in 1991) of a Minitab macro and a Stata program for calculating V' and producing v' plots.  Unfortunately he no longer has these scripts in his computer.  Therefore I wondered if any reader of this list possessed S (or indeed R) versions of Royston's routines?

I have, of course, done the usual searches but only obtain references to Royston's own modifications of the Shapiro-Francia test itself.  Any help or advice would be gratefully received.  Thank you.

Ralph Henderson (ahenders@uwo.ca)
Department of Biochemistry
University of Western Ontario
London, Ontario, Canada
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