slm: spatial logistic map

In spEDM: Spatial Empirical Dynamic Modeling

spatial logistic map

Description

spatial logistic map

Usage

## S4 method for signature 'sf'
slm(
  data,
  x = NULL,
  y = NULL,
  z = NULL,
  k = 4,
  step = 15,
  alpha_x = 0.28,
  alpha_y = 0.25,
  alpha_z = 0.22,
  beta_xy = 0.05,
  beta_xz = 0.05,
  beta_yx = 0.2,
  beta_yz = 0.2,
  beta_zx = 0.35,
  beta_zy = 0.35,
  threshold = Inf,
  transient = 1,
  nb = NULL
)

## S4 method for signature 'SpatRaster'
slm(
  data,
  x = NULL,
  y = NULL,
  z = NULL,
  k = 4,
  step = 15,
  alpha_x = 0.28,
  alpha_y = 0.25,
  alpha_z = 0.22,
  beta_xy = 0.05,
  beta_xz = 0.05,
  beta_yx = 0.2,
  beta_yz = 0.2,
  beta_zx = 0.35,
  beta_zy = 0.35,
  threshold = Inf,
  transient = 1
)

Arguments

data	observation data.
x	(optional) name of first spatial variable.
y	(optional) name of second spatial variable.
z	(optional) name of third spatial variable.
k	(optional) number of neighbors to used.
step	(optional) number of simulation time steps.
alpha_x	(optional) growth parameter for x.
alpha_y	(optional) growth parameter for y.
alpha_z	(optional) growth parameter for y.
beta_xy	(optional) cross-inhibition from x to y.
beta_xz	(optional) cross-inhibition from x to z.
beta_yx	(optional) cross-inhibition from y to x.
beta_yz	(optional) cross-inhibition from y to z.
beta_zx	(optional) cross-inhibition from z to x.
beta_zy	(optional) cross-inhibition from z to y.
threshold	(optional) set to NaN if the absolute value exceeds this threshold.
transient	(optional) transients to be excluded from the results.
nb	(optional) neighbours list.

Value

A list

References

Willeboordse, F.H., The spatial logistic map as a simple prototype for spatiotemporal chaos, Chaos, 533–540 (2003).

Examples

columbus = sf::read_sf(system.file("case/columbus.gpkg", package="spEDM"))
columbus$inc = sdsfun::normalize_vector(columbus$inc)
slm(columbus,"inc")

spEDM documentation built on June 25, 2025, 9:07 a.m.