[R-sig-Geo] Autologistic regression in R

[Mingke Li]

Hi,

I am new to autologistic regression and R. I do have questions when starting a project in which I believe autologistic regression (spdep package) is needed.

I have a point layer whose attribute table stores the values of the dependent variable (population of a kind of insect), all the independent variables (environmental factors), and the associated latitude and longitude. I hope to to fit an autologistic model to analyze which factors or combinations of factors have effects on the presence/absence of the insect (1 or 0).

I found other papers which applied autologistic regression in their study almost used a grid system and defined their window sizes. So, my question is do I have to convert my point layer into a grid system if I want to do this analysis with R?

Also, what should I consider when I generate the grid system? How to determine a proper cell size? How about the searching window (neighbourhood) size?

Many Thanks.

Erin


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