histniche {adehabitat} | R Documentation

## 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, the position of the mean of each distribution is indicated by dotted lines
`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

### Author(s)

Mathieu Basille basille@biomserv.univ-lyon1.fr

### Examples

    ## Not run:
    ## 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")
    ## End(Not run)

[Package adehabitat version 1.4 Index]