[R-sig-eco] Different results from nnwhich() function
pdixon at iastate.edu
Wed Nov 24 20:31:25 CET 2010
You get different results because you're giving nnwhich() different input.
nnwhich(ppp_viz, k = 1)
uses the x,y coordinates of the points. This ignores the marks (as it should).
nnwhich(ppp_viz$marks, k = 1)
uses the integer representation of your species names. That's what ppp_viz$marks contains.
In fact, I didn't know nnwhich() would run when given just the mark information. ppp_viz$marks is
not a ppp object, so nnwhich should return an error.
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