makeCRM {spup}

Defining a spatial correlogram model

Description

Function that generates a spatial correlogram model, an object of class "SpatialCorrelogramModel".

Usage

makeCRM(
  acf0 = 1,
  range = NA,
  model,
  anis,
  kappa = 0.5,
  add.to,
  covtable,
  Err = 0
)

Arguments

acf0

Aurocorrelation function value at distance near 0. Default is 1. Must fall in interval [0,1].

range

Range parameter of the correlogram model component.

model

Model type, e.g. "Exp", "Sph", "Gau", "Mat" that vgm() accepts. See ?gstat::vgm() for more #' details.

anis

Anisotropy parameters. See ?gstat::vgm() for more details.

kappa

Smoothness parameter for the Matern class of variogram models. See ?gstat::vgm() for more #' details.

add.to

See ?gstat::vgm() (currently not in use)

covtable

See ?gstat::vgm() (currently not in use)

Err

Numeric. See ?gstat::vgm() for more details.

Details

For the spatial variables allowed autocorrelation functions are listed in Table 4.1 of the gstat manual. Spatial correlation assumes stationarity, i.e. correlation depends only on the separation distance between points in space. Anisotropy is allowed. No nested models are allowed in the current version.

Value

An object of a class "SpatialCorrelogramModel". This is a list collating provided arguments.

Author(s)

Kasia Sawicka, Gerard Heuvelink

Examples

mycormodel <- makeCRM(acf0 = 0.8, range = 300, model = "Exp")
str(mycormodel)