[R-sig-eco] Permutation: habitat diversity

[Gavin Simpson]

On Fri, 2011-12-23 at 18:41 +0000, Martin Wilkes wrote:
> We have counts of habitat types at three sites and want to permute the
> sets of counts between sites to get a distribution of habitat (H)
> diversity. We have tried several R functions (perm, sample, permtest)
> but none seems to do what we want.  We're happy writing the code to
> calculate the H distribution but need some help getting the
> permutations right if possible please.

Hi Martin,

Its not immediately clear to me what your data looks like nor what needs
to be shuffled and what doesn't. Could you expand, perhaps with a
simplified example or structure of data and how you want to shuffle it?

In the meantime, take a look at the permute package as it may do what
you want. If it doesn't I'd be interested in knowing how you want to
permute your data as it might be easy to add this sort of thing to
permute at a later date.

All the best,

Gavin

> Thanks
> 
> Martin Wilkes
> University of Worcester
> 
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