Simulate data

Simulate spatially auto-correlated data using Gaussian random fields.

Usage

simulate_data(x, n, scale, intensity, sd, transform)

# S3 method for class 'sf'
simulate_data(
  x,
  n = 1,
  scale = 0.5,
  intensity = 0,
  sd = 1,
  transform = identity
)

# S3 method for class 'SpatRaster'
simulate_data(
  x,
  n = 1,
  scale = 0.5,
  intensity = 0,
  sd = 1,
  transform = identity
)

Arguments

x

terra::rast() or sf::st_sf() object to use as a template.

n

integer number of layers to simulate. Defaults to 1.

scale

numeric parameter to control level of spatial auto-correlation in the simulated data. Defaults to 0.5.

intensity

numeric average value of simulated data. Defaults to 0.

sd

numeric standard deviation of simulated data. Defaults to 1.

transform

function transform values output from the simulation. Defaults to the identity() function such that values remain the same following transformation.

Value

A terra::rast() or sf::st_sf() object.

Examples

# \dontrun{
# create raster
r <- terra::rast(
  ncols = 10, nrows = 10, xmin = 0, xmax = 1, ymin = 0, ymax = 1, vals = 1
)

# simulate data using a Gaussian field
x <- simulate_data(r, n = 1, scale = 0.2)

# plot simulated data
plot(x, main = "simulated data", axes = FALSE)
#> Error in plot.xy(xy, type, ...): invalid type passed to graphics function

# }