[R-sig-eco] Dissimilarity measure for rank data

[Sarah Goslee]

Hi Tania,

That's not really an R question, and there's no one perfect answer.
Googling "distance metric for ordinal data" turns up some discussions of
the pros and cons of the various options.

You need to choose the one best able to address your hypothesis. You might
get better ideas on a statistics forum, rather than an R-specific list.

Sarah

On Thu, Jun 8, 2017 at 6:54 AM Tania Bird <taniabird at gmail.com> wrote:

> I have species data that I would like to use for ordination. With
> regular abundance data I would apply a Hellinger Transformation and
> then use the Bray-Curtis distance.
>
> Since the data are ranked (0 to 5) I will not transform it. But what
> dissimilarity measure should I use instead of Bray-Curtis?
>
> Thanks
>
>
> Tania Bird MSc
> "There is a sufficiency in the world for man's need but not for man's
> greed" ~ Mahatma Gandhi
>
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-- 
Sarah Goslee
http://www.stringpage.com
http://www.sarahgoslee.com
http://www.functionaldiversity.org

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