Re: [R-sig-eco] Calculating spatial autocorrelation (Moran's I) when have zero-inflated data?

2011-09-27 Thread Gavin Simpson
On Sun, 2011-09-25 at 22:01 -0700, Laura S wrote: > Dear all: > > I was wondering if you have suggestions on how to analyze the spatial > autocorrelation of tree abundance in a grid of contiguous quadrats given > that the data set follows a zero inflated distribution, i.e., in many > quadrats the

[R-sig-eco] Calculating spatial autocorrelation (Moran's I) when have zero-inflated data?

2011-09-25 Thread Laura S
Dear all: I was wondering if you have suggestions on how to analyze the spatial autocorrelation of tree abundance in a grid of contiguous quadrats given that the data set follows a zero inflated distribution, i.e., in many quadrats the abundance of a species is zero. Thank you for your time and c