Hi R users,
In the package Spatstat, I'd like to apply 'nncorr' to a point pattern (with
continuous marks), like this:
NNcorrel <- nncorr(pattern) *
However, I'm getting this error: "Error in nncorr(pattern) : Insufficient
data". This error is not because there are no points inside the window
(there are always >= 2 points). I think the error occurs because the mean
nearest neighbour distance is above a critical value. This critical value
seems to be the same as the 'range' argument that's used in the 'markcorr'
and 'pcf' R functions. I don't really understand why nncorr returns an error
when the points are far apart...
So the question is, how do I tell nncorr to measure the correlation between
nearest-neighbours, IRRESPECTIVE of the mean nearest neighbour distance ??
Thanks!
Tom
* actually I'm using a special correlation function for angular marks (see
help(markcorr) for details):
NNcorrel <- nncorr(pattina, function(m1,m2) {sin(m1-m2)^2})
However, that's not particularly relevant as both this & the simpler version
given above return the same error.
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