adehabitatHR (version 0.4.21)

findmax: Find Local Maxima on a Map of Class 'SpatialPixelsDataFrame'

Description

findmax finds the local maxima on a map of class SpatialPixelsDataFrame.

Usage

findmax(x)

Value

an object of class SpatialPoints containing the x and y coordinates of the local maxima.

Arguments

x

a map of class SpatialPixelsDataFrame with one column

Author

Clement Calenge

Details

This function may be useful, among other things, to identify the local modes of the utilization distribution of an animal estimated using kernelUD.

See Also

SpatialPixelsDataFrame-class for additionnal information on objects of class SpatialPixelsDataFrame.

Examples

data(puechabonsp)

## estimates the UD
kud <- kernelUD(puechabonsp$relocs[,1])

## displays the maximum
image(kud[[1]])
points(findmax(kud[[1]]))