translate_raster

Torus translation

Usage

translate_raster(
  raster,
  steps_x = NULL,
  steps_y = NULL,
  return_input = TRUE,
  simplify = FALSE,
  verbose = TRUE
)

Arguments

raster

SpatRaster with discrete habitat classes.

steps_x, steps_y

Integer with number of steps (cells) the raster is translated into the corresponding direction. If both are null, all possible combinations are used resulting in n = ((50 + 1) * (50 + 1)) - 4 rasters.

return_input

Logical if the original input data is returned.

simplify

Logical if only the raster will be returned if n_random = 1 and return_input = FALSE.

verbose

Logical if progress report is printed.

Value

rd_ras

Details

Torus translation test as described in Harms et al. (2001). The raster is shifted in all four cardinal directions by steps equal to the raster resolution. If a cell exits the extent on one side, it enters the extent on the opposite side.

The method does not allow any NA values to be present in the SpatRaster.

References

Harms, K.E., Condit, R., Hubbell, S.P., Foster, R.B., 2001. Habitat associations of trees and shrubs in a 50-ha neotropical forest plot. Journal of Ecology 89, 947–959. <https://doi.org/10.1111/j.1365-2745.2001.00615.x>

See also

randomize_raster

Examples

if (FALSE) { # \dontrun{
landscape_classified <- classify_habitats(terra::rast(landscape), n = 5, style = "fisher")

landscape_random <- translate_raster(landscape_classified)
landscape_random_sub <- translate_raster(landscape_classified,
steps_x = 1:10, steps_y = 1:5)
} # }