SDMtune (version 1.1.1)

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.

Value

An '>SWD object.

Details

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

Examples

# NOT RUN {
# 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
# }