Hi dmaa, I got this error when I used too low grid values to quickly checked the results. Try different values for the "grid" parameter (e.g. grid=450).
In addition, the extent values of alittle seem to be rather high. As I understand it (and please correct me if I am wrong), the extent is a factor that defines by how much percent of the range of coordinates included in a dataset is extended, so that the UD is not cut off too early. For example: If the bounding box around your coordinates is 300x300 km, a extent of 0.1 would expand this area by 10% (in total 330x330 km). Therefore, unless you have enormously high smoothing parameters and/or tiny home ranges to expect, extents of 0.10.5 will be enough. About the area issue: Are the differences large or so small that they are negligible and possibly only a result of different precisions? Another reason could be that one of the two methods considers holes and subtract their areas while the other does not. Best regards, André -----Ursprüngliche Nachricht----- Von: R-sig-ecology [mailto:r-sig-ecology-boun...@r-project.org] Im Auftrag von dmaa Gesendet: Montag, 13. Juli 2015 13:48 An: r-sig-ecology@r-project.org Betreff: Re: [R-sig-eco] problem with kernel UD estimation using adehabitatHR Any news on this? I'm having a similar problem. In addition, kernel.area(x,percent=c(50,95),unout="m2",standardize=F) provides different area values when compared with those obtained by using getverticeshr(kudvej, 95,unout="m2") -- View this message in context: http://r-sig-ecology.471788.n2.nabble.com/problem-with-kernel-UD-estimation- using-adehabitatHR-tp7578930p7579498.html Sent from the r-sig-ecology mailing list archive at Nabble.com. _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
