SDMtune: prepareSWD – R documentation

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prepareSWD

Prepare an SWD object

Description

Given the coordinates, the species' name and the environmental variables, the function creates an SWD object (sample with data).

Usage

prepareSWD(species, env, p = NULL, a = NULL, categorical = NULL)

Arguments

`species`	character. The name of the species.
`env`	stack containing the environmental variables used to extract the values at coordinate locations.
`p`	data.frame. The coordinates of the presence locations.
`a`	data.frame. The coordinates of the absence/background locations.
`categorical`	vector indicating which of the environmental variable are categorical, default is `NULL`.

Details

The SWD object is created in a way that the presence locations are always before than the absence/background locations.

Value

An SWD object.

Author(s)

Sergio Vignali

Examples

# Acquire environmental variables
files <- list.files(path = file.path(system.file(package = "dismo"), "ex"),
                    pattern = "grd", full.names = TRUE)
predictors <- raster::stack(files)

# Prepare presence and background locations
p_coords <- virtualSp$presence
bg_coords <- virtualSp$background

# Create the SWD object
data <- prepareSWD(species = "Virtual species", p = p_coords, a = bg_coords,
                   env = predictors, categorical = "biome")
data

SDMtune

Species Distribution Model Selection

v1.1.4

GPL-3

Authors

Sergio Vignali [aut, cre] (<https://orcid.org/0000-0002-3390-5442>), Arnaud Barras [aut] (<https://orcid.org/0000-0003-0850-6965>), Veronika Braunisch [aut] (<https://orcid.org/0000-0001-7035-4662>), Conservation Biology - University of Bern [fnd]

Initial release