[adegenet-forum] sPCA: Calculation of spatial autocorrelation for PA data

[Vanesse Labeyrie]

  Hi,

I did not found details concerning the calculation of the spatial 
autocorrelation index for presences/absence ("PA") data in the sPCA.

I want to use sPCA for a species inventory table (presence of the 
species coded 1 and absence 0), and I would like to know how the spatial 
autocorrelation is calculated for this kind of data, as I thought 
Moran's I is used for continuous numerical data only.

Many thanks for you answer

-- 
Vanesse LABEYRIE

CIRAD Montpellier