Spatial statistics is a recent and graphical subject which is ideally suited to implementation in S; S itself includes one spatial interpolation method, akima , and loess which can be used for two-dimensional smoothing, but the specialist methods of spatial statistics have been added and are given in our library spatial . The main references for spatial statistics are Ripley (1981, 1988), Diggle (1983), Upton & Fingleton (1985) and Cressie (1991). Not surprisingly, our notation is closest to that of Ripley (1981).
KeywordsCovariance Function Delaunay Triangulation Spatial Statistic Spatial Interpolation Nugget Effect
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