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amachine
2005 Dec 09
1
O-ring statistic
...imate 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 intensity of type 2 points you use summary(X).
Here's an example for the bivariate point pattern dataset 'amacrine'
provided in the spatstat package. The dataset has points of two types
labelled "on" and "off".
data(amacrine)
K12 <- Kcross(amacrine, "on", "off")
g12 <- pcf(K12, method="d", spar=0.7)
lambda2 <- summary(a...