Hi all, I'm using spatstat to investigate the spatial structure of an arid shrub population. The first-order intensity of my data does not appear to be homogenous, so I would like to use inhomogeneous techniques. I realise there is a inhomogeneous K-function available in spatstat, but there doesn't not appear to be one for the pair-correlation function (O-ring statistic). As such I was planning to use a new technique (the K2 index) as described in Schiffers et al. (2008) [Ecography, 31:545-555]. The following website has more detail [http://www.oikos.ekol.lu.se/appendixdown/E5374-example.R]. Despite this I cannot get the function to run! I am not very familiar with R so it is likely my problem is simple. Does anyone have any experience with the K2-index who can give me some pointers?
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