This has been shown to yield unreliable analyses. Use the more formal
proportional odds ordinal logistic model. This is a generalization of
the Wiloxon-Mann-Whitney-Kruskal-Wallis statistic. This is
implemented in the rms package and elsewhere.
Frank E Harrell Jr Professor and Chairman School of Medicine
Department of Biostatistics Vanderbilt University
On Tue, 27 Jul 2010, Dennis Fisher wrote:
> Colleagues
>
> I am trying to replicate some analyses performing in SAS using a "rank
ANCOVA model". I assume that this is a non-parametric ANOVA with
covariates but I have not been able to get confirmation from the people who did
the original analyses. Can anyone direct me to the comparable function for R?
Thanks in advance.
>
> Not that it matters in this situation but the platform is OS X; R version
is 2.11.
>
> Dennis
>
> Dennis Fisher MD
> P < (The "P Less Than" Company)
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