histniche: Histograms of the Ecological Niche

In adehabitatHS: Analysis of Habitat Selection by Animals

Histograms of the Ecological Niche

Description

histniche draws histograms of the niche-environment system: an histogram of the available resource units (environment) is drawn on the same graph as an histogram of the used resource units (i.e. the niche), for comparison.

Usage

histniche(x, pr, type = c("h", "l"), adjust = 1,
          Acol, Ucol, Aborder, Uborder, Alwd = 1,
          Ulwd = 1, ylim, ncla = 15, ...)

Arguments

x	a data frame giving the value of environmental variables (columns) in resource units (rows, e.g. the pixels of a raster map)
pr	a vector of integers with the same length as nrow(x) (giving for example the number of detections in the pixels)
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
ylim	the limits for the y axis
ncla	The number of classes of the histogram
...	further arguments passed to or from other methods

Author(s)

Mathieu Basille [e-mail]

Examples

## Not run: 

data(puechabonsp)
cp <- count.points(puechabonsp$relocs, puechabonsp$map)
puechabonsp$map

histniche(slot(puechabonsp$map, "data"), slot(cp, "data")[,1])
histniche(slot(puechabonsp$map, "data"), slot(cp, "data")[,1],
          ty="l")


## End(Not run)

adehabitatHS documentation built on Sept. 11, 2024, 7:38 p.m.