Description Usage Arguments Details Value Author(s) References Examples
This function estimates an animals home range using Local Convex Hulls (LoCoH).
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xy |
data.frame with two columns. The first column contains x coordinates and the second column contains y coordinates. |
levels |
a vector with isopleth levels at which home range should be calculated. |
ud |
a logical value, indicating whether or not a utilization distribution should be calculated. |
cud |
a logical value, indicating whether or not a cumulative utilization distribution should be calculated. |
xrange |
vector of length 2, with xmin and xmax for the UD |
yrange |
vector of length 2, with ymin and ymax for the UD |
res |
numeric value, the resolution of the ud. |
type |
character value, one of k, r, a. Three methods to select which neighbours are used for local hulls are availabe: i) k-nearest neighbours; ii) neighbours within a radius r; iii) neighbours within a cummulative dististance a. |
n |
numeric value, if type is k it is the number of neaerst neibhers, if type is r it is the radius that is searched and if type is a it is the cummulative distance to be used. |
minPts |
numeric value, the minimum number of neighbours required. |
Three different types available for determining the number of neighbors:
"k"uses the k nearest neighbours
"r"uses all neighbours within a radius r
"a"uses all neighbours that can be
reached within a distance a. The distance to all points
is calculated and then the cummulatively summed starting
from the smallest until a
is reached.
object of class RhrHREstimator
Johannes Signer
Getz, W. M., & Wilmers, C. C. (2004). A local nearest-neighbor convex-hull construction of home ranges and utilization distributions. _Ecography_, 27(4), 489-505.
Getz, W. M., Fortmann-Roe, S., Cross, P. C., Lyons, A. J., Ryan, S. J., & Wilmers, C. C. (2007). LoCoH: nonparameteric kernel methods for constructing home ranges and utilization distributions. _PloS one_, 2(2), e207.
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