[R] denoting post-hoc test differences using letters

[Dennis Murphy]

Hi:

Perhaps the cld() function in the multcomp package is what you're looking for.

Dennis

On Mon, May 23, 2011 at 9:40 AM, Adrienne Keller
<adrienne.keller at umontana.edu> wrote:
> Is there code in R to automatically assign letters to different groups that
> are found to be statistically significant using a post-hoc test following an
> ANOVA? For example, let's say I found that relative rates of tree growth
> were statistically significant between tree species using an ANOVA and then
> I ran a TukeyHSD post-hoc test to determine which species were statistically
> different from one another. I can manually assign different letters for each
> species that is different from another, but is there code to do this
> automatically in R. I would like to add these letters to a table, but have
> many different ANOVAs and doing this manually will be quite time consuming.
>
> Thanks,
>
> Adrienne
>
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