Compute Moran's I or Geary's C measures of global spatial autocorrelation in a RasterLayer, or compute the the local Moran or Geary index (Anselin, 1995).
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Spatial weights defined by or a rectangular matrix with odd length (3, 5, ...) sides (as in
The default setting uses a 3x3 neighborhood to compute "Queen's case" indices. You can use a filter (weights matrix) to do other things, such as "Rook's case", or different lags.
A single value (Moran's I or Geary's C) or a RasterLayer (Local Moran or Geary values)
Robert J. Hijmans and Babak Naimi
Moran, P.A.P., 1950. Notes on continuous stochastic phenomena. Biometrika 37:17-23
Geary, R.C., 1954. The contiguity ratio and statistical mapping. The Incorporated Statistician 5: 115-145
Anselin, L., 1995. Local indicators of spatial association-LISA. Geographical Analysis 27:93-115
The spdep package for additional and more general approaches for computing indices of spatial autocorrelation
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