[R] Rank ANCOVA

[Frank Harrell]

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
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