SDMtune (version 0.2.1)

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, p = NULL, a = NULL, coords = NULL, env,
  categorical = NULL)

Arguments

species

character. The name of the species.

p

data.frame. The coordinates of the presence locations.

a

data.frame. The coordinates of the absence/background locations.

coords

Deprecated.

env

stack containing the environmental variables used to extract the values at coordinate 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
# }