adehabitat (version 1.3)

histniche: Histograms of the Ecological Niche

Description

histniche draws histograms of the variables mapped in an object of class kasc (habitat available for the species). The histograms of the habitat used by a species (i.e. the niche) are computed from the locations of the focus species, and are added to the plot of available habitat for each variable, for comparison.

Usage

histniche(kasc, pts, type = c("h", "l"), adjust = 1,
          Acol, Ucol, Aborder, Uborder, Alwd = 1, Ulwd = 1, ...)

Arguments

kasc

a raster map of class kasc

pts

a data frame with two columns, giving the coordinates of the species locations

type

what type of plot should be drawn. Possible types are: * "h" for histograms, * "l" for kernel density estimates (see ?density). By default, type = "h" is used. If type = "l" is used,

adjust

if type = "l", a parameter used to control the bandwidth of the density estimate (see ?density)

Acol

color for the histograms of the available pixels

Ucol

color for the histograms of the used pixels

Aborder

if type = "h", color for the border of the histograms of the available pixels (see help(hist.default))

Uborder

if type = "h", color for the border of the histograms of the used pixels (see help(hist.default))

Alwd

if type = "l", line width for the density estimate of the available pixels

Ulwd

if type = "l", line width for the density estimate of the used pixels

...

further arguments passed to or from other methods

Examples

## Example with factors and numeric variables
data(puechabon)
histniche(puechabon$kasc, puechabon$locs[, c("X", "Y")])

## Aspect is a factor, then it's not possible to use 
## kernel density estimates for it :
histniche(puechabon$kasc, puechabon$locs[, c("X", "Y")], type = "l")