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nlm_edgegradient

Source: R/nlm_edgegradient.R
nlm_edgegradient.Rd

Simulates an edge-gradient neutral landscape model.

Usage

nlm_edgegradient(
  ncol,
  nrow,
  resolution = 1,
  direction = NA,
  user_seed = NULL,
  rescale = TRUE
)

Arguments

ncol

[numerical(1)]
Number of columns forming the raster.

nrow

[numerical(1)]
Number of rows forming the raster.

resolution

[numerical(1)]
Resolution of the raster.

direction

[numerical(1)]
Direction of the gradient (between 0 and 360 degrees), if unspecified the direction is randomly determined.

user_seed

[numerical(1)]
Set random seed for the simulation.

rescale

[logical(1)]
If TRUE (default), the values are rescaled between 0-1.

Value

RasterLayer

Details

Simulates a linear gradient orientated on a specified or random direction that has a central peak running perpendicular to the gradient direction.

References

Travis, J.M.J. & Dytham, C. (2004) A method for simulating patterns of habitat availability at static and dynamic range margins. Oikos, 104, 410–416.

See also

nlm_distancegradient, nlm_planargradient

Examples


# simulate random curdling
edge_gradient <- nlm_edgegradient(ncol = 100, nrow = 100, direction = 80)

if (FALSE) { # \dontrun{
# visualize the NLM
raster::plot(edge_gradient)
} # }