image.grf {geoR} | R Documentation

## Image, Contour or Perspective Plot of Simulated Gaussian Random Field

### Description

Methods for image, contour or perspective plot of a realisation of a Gaussian random field, simulated using the function `grf`.

### Usage

    ## S3 method for class 'grf':
    image(x, sim.number = 1, x.leg, y.leg, ...)
    ## S3 method for class 'grf':
    contour(x, sim.number = 1, filled = FALSE, ...)
    ## S3 method for class 'grf':
    persp(x, sim.number = 1, ...)

### Arguments

`x` | 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.
`x.leg, y.leg` | limits for the legend in the horizontal and vertical directions.
`filled` | logical. If `FALSE` the function `contour` is used otherwise `filled.contour`. Defaults to `FALSE`.
`...` | further arguments to be passed to the functions `image`, `contour` 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. paulojus@leg.ufpr.br,
Peter J. Diggle p.diggle@lancaster.ac.uk.

### References

Further information about the package geoR can be found at:
http://www.leg.ufpr.br/geoR.

### 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(441, grid="reg", cov.pars=c(1, .25), nsim=4)
    op <- par(no.readonly = TRUE)
    par(mfrow=c(2,2), mar=c(3,3,1,1), mgp = c(2,1,0))
    for (i in 1:4)
      image(sim, sim.n=i)
    par(op)

[Package geoR version 1.6-19 Index]