image.grf {geoR}R Documentation

Image or Perspective Plot of Simulated Gaussian Random Field

Description

Plots an image or perspective plot with a realization of a Gaussian random field, simulated using the function grf.

Usage

image.grf(obj, sim.number = 1, ...)

persp.grf(obj, sim.number = 1, ...)

Arguments

obj an object of the class grf, typically an output of the function grf.
sim.number simulation number. Indicates the number of the simulation top be plotted. Only valid if the object contains more than one simulation. Defaults to 1.
... further arguments to be passed to the functions image or persp.

Value

An image or perspective plot is produced on the current graphics device. No values are returned.

Author(s)

Paulo Justiniano Ribeiro Jr. Paulo.Ribeiro@est.ufpr.br,
Peter J. Diggle p.diggle@lancaster.ac.uk.

References

Further information about geoR can be found at:
http://www.maths.lancs.ac.uk/~ribeiro/geoR.html.

See Also

grf for simulation of Gaussian random fields, image and persp for the generic plotting functions.

Examples

# generating 4 simulations of a Gaussian random field
sim <- grf(225, grid="reg", cov.pars=c(1, .25), nsim=4)
op <- par(no.readonly = TRUE)
par(mfrow=c(2,2))
par(mar=c(3,3,1,1))
par(mgp = c(2,1,0))
par(pty="s")
for (i in 1:4)
  image.grf(sim, sim.n=i)
par(op)