Hello list members: I have some questions regarding the kerneloverlap function within the adehabitatHR package, and must offer my apologies if they seem rather base:
-I understand that the comparisons between the HR method for kerneloverlap and MCP overlap are often misleading. Why doesn't this method make for a good comparison to MCP area intersection? -kerneloverlap function computes indices from sets of relocations, whereas kerneloverlaphr computers indices from estUDs. Why might one be preferred over the other? -I notice in working with the kerneloverlap function that the selected grid size influences home range overlap. What is the best way to select a biologically meaningful grid size? -When trying to work with the kerneloverlaphr, I am given the warning "In vi * vj : longer object length is not a multiple of shorter object length". I'm afraid I can't say I really understand this statement (as each animal has the same number of relocations) nor what the function is doing with my data to account for it. -I also realize that an issue with the kernel UD LSCV estimate is that the cross-validation criterion sometimes fails to be minimized. But </i>why</i> is this sometimes the case? i.e. what about the relocations might cause this? Any feedback would be greatly appreciated! Ellen Pero M.Sc. Candidate Department of Biological Sciences University of Manitoba Winnipeg, MB
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