sample_envbg: Generate random environmental background data

In luismurao/ntbox: From Getting Biodiversity Data to Evaluating Species Distribution Models in a Friendly GUI Environment

Generate random environmental background data

Description

Generate environmental background data is a function similar to sampleRandom function of the raster package but optimized for Ecological niche modeling.

Usage

sample_envbg(
  envlayers,
  nbg,
  nprop = NULL,
  coordinates = FALSE,
  cellIDs = FALSE,
  rseed = NULL,
  parallel = TRUE,
  ncores = 4
)

Arguments

envlayers	A raster stack or brick.
nbg	Number of points for the background data
nprop	Proportion of environmental data to be sampled. Default NULL
coordinates	Logical. If TRUE cell coordinates will be returned
cellIDs	Logical. If TRUE cell IDs will be returned
rseed	Random seed number. Default NULL
parallel	Run the process in parallel
ncores	Number of workers to run the parallel process.

Examples

## Not run: 
wcpath <- list.files(system.file("extdata/bios",
                                 package = "ntbox"),
                     pattern = ".tif$",
                     full.names = TRUE)

envlayers <- raster::stack(wcpath)
vals <- sample_envbg(envlayers,nbg = 3583)
# Using a proportion of data
vals <- sample_envbg(envlayers,nprop = 0.20)

## End(Not run)

luismurao/ntbox documentation built on Nov. 22, 2024, 4 a.m.