You should be able to calculate any distance matrix from binary trait data
using stats:::dist, vegan:::vegdist etc. Once you have a valid dist object, you
can use ade4:::divc instead of the wrapper.
Peter
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Péter Sólymos, Dept Biol Sci, Univ Alberta, T6G 2E9, Canada AB
soly...@ualberta.ca, Ph
Hello,
Thank you very much for you answers. I was wondering what happens if I
have abundance data for my species matrix but binary trait values?
Because it seems the function has some problems with this combination.
Regards,
Thomas
On 6/12/2013 5:17 PM, Peter Solymos wrote:
> Thoma
Thomas,
1) Presence absence data means that you have cell probabilities 1/S_i for
detections and 0 for missing species in a given community i. As Zoltán also
pointed out, it is meaningful to use this, as it has the interpretation of
choosing different species from a species list (and not from a p
Dear Thomas,
Is it possible, and meaningful, to calculate Rao`s quadratic entropy
index (function dbFD from package FD) with presence-absence data?
Yes, it is possible and meaningful. In this case it is simply the mean
distance between the occurring species.
I don't get a error message b
Hello,
Is it possible, and meaningful, to calculate Rao`s quadratic entropy
index (function dbFD from package FD) with presence-absence data? I
don't get a error message but when I use the function with
(...,scale.Rao=TRUE) the calculations never end.
Thank you for your answer.
/Thomas
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