Hi-
I would like to assign distance classes (lags) to the moran's I test in R.

 I donšt have equally spaced points since I was mapping shrubs across a
landscape (vs. an experiment or survey in a grid).   I somehow need to
select points based on the distances in the distance matrix (i.e., I need to
select all pairs of points that occur 0-25 m from each other, 25-50 m,
etc...).  

Does anyone have code or a detailed procedure for subsampling or dividing a
dataset into distance classes for moranšs I (or mantel test)?
I know there is sp.correlogram  but I need significance values for each I
value and I need to use distance lags, not lags of number of polygons.


Any suggestions would be appreciated.
Best wishes, theresa


-- 
Theresa Sinicrope Talley
Dept of Environmental Science and Policy
University of California
One Shields Ave
Davis, CA 95616
phone: 530.752.2843
fax: 530.752.3350
office: 1226 PES
http://www.des.ucdavis.edu/students/ttalley/




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