plot.sahrlocs {adehabitat} | R Documentation

## Exploratory Analysis of Habitat Selection

### Description

`plot.sahrlocs` applies the function `widesII` or `widesIII` for each variable in the object of class `sahrlocs`, and the results are stored in a list. Then, the function `plot.wi` is applied to each component of the list. This allows to investigate habitat selection by animals at several scales for design II and III data.

### Usage

    plot.sahrlocs(x, ani = names(x$hr), var = names(x$sa),
                  type = c("hr.in.sa", "locs.in.hr", "locs.in.sa"),
                  ncla = 4, ylog = FALSE, caxis = 0.7, clab = 0.7,
                  errbar = c("SE", "CI"), alpha = 0.05, draw = TRUE, ...)

### Arguments

`x` | an object of class `sahrlocs`
`ani` | a character vector. This vector contains the names of the animals in `x` for which habitat selection should be displayed. At least two animals are required
`var` | a character vector. This vector contains the names of the variables in `x` for which habitat selection should be displayed
`type` | a character string. Type of habitat selection that should be investigated. If `"hr.in.sa"`, the selection of the home-range within the study area is displayed. If `"locs.in.sa"`, the selection of the relocations within the study area is displayed. If `"locs.in.hr"`, the selection of the relocations within the home range is displayed
`ncla` | numeric variables are converted to factors. This parameter controls the number of classes of these factors
`ylog` | logical. If `TRUE`, the selection ratios are plotted on a log scale
`caxis` | character size on axes to be passed to `par("cex.axis")`
`clab` | character size of axes labels to be passed to `par("cex.lab")`
`errbar` | a character string. Type of error bars: either `"CI"` for confidence intervals or `"SE"` for standard errors
`alpha` | the alpha-level for the tests
`draw` | logical. If `FALSE`, no plot is drawn
`...` | further arguments to be passed to the function `plot.wi`

### Value

The function returns a list of objects of class `wiII` or `wiIII` (one component per animal).

### Author(s)

Clément Calenge calenge@biomserv.univ-lyon1.fr

### References

Manly B.F.J., McDonald L.L., Thomas, D.L., McDonald, T.L. & Erickson, W.P. (2003) Resource selection by animals - Statistical design and Analysis for field studies. Second edition. London: Kluwer academic publishers.

### See Also

`widesII` and `widesIII` for further information on objects of class `wiII` and `wiIII`, `as.sahrlocs` for further information on objects of class `sahrlocs`.

### Examples

    data(puechabon)
    sahr <- puechabon$sahr
    toto <- plot(sahr)

    ### Note that the wild boars named Brock and Calou
    ### have only one herbaceous cover class available
    ### (the second one), and they use it exclusively.
    ### So they have identical
    ### selection ratios (that's why the curve of Brock
    ### does not appear: it is hidden behind the curve
    ### of the boar named Calou).

    toto
    toto$Elevation

[Package adehabitat version 1.4 Index]