prepareSWD {SDMtune} | R Documentation |
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,
verbose = TRUE
)
Arguments
species |
character. The name of the species. |
env |
rast 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. |
verbose |
logical, if |
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 <- terra::rast(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
[Package SDMtune version 1.3.1 Index]