| findmaxasc {adehabitat} | R Documentation |
findmaxasc finds the local maxima on a map of class
asc.
findmaxasc(asc)
asc |
a map of class asc |
This function may be useful, among other things, to identify the local
modes of the utilization distribution of an animal (e.g. estimated
using kernelUD).
a data frame with two columns containing the x and y coordinates of the local maxima.
Clement Calenge clement.calenge@oncfs.gouv.fr
## example, to find the mode of the utilization distribution (UD) of an
## animal:
## load the data
data(puechabon)
loc <- puechabon$locs[, c("X", "Y")]
id <- puechabon$locs[, "Name"]
## Estimation of UD for the four animals
(ud <- kernelUD(loc, id))
image(ud)
## Now consider the UD of Chou
map <- ud$Chou$UD
image(map)
## Find the local maxima:
maxim <- findmaxasc(map)
points(maxim, col="red", pch=16, cex=1.5)