search for: o_12

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2005 Dec 09
1
O-ring statistic
...tic included in one of the packages in R? This kind of functionality is available in the R package `spatstat' (available on CRAN or from www.spatstat.org) According to the cited website, the O-ring statistic is a rescaled version of the pair correlation function between two types of points: O_12(r) = lambda_2 g_12(r) In spatstat, pair correlation functions are computed by the function 'pcf'. To estimate the cross-type pair correlation function, you do something like pcf(Kcross(X, 1, 2)) where X is a marked point pattern containing points of types 1 and 2. To estimate the i...