geoR (version 1.0-0)

plot.grf: Plots Variograms for Simulated Data

Description

This function plots variograms for simulated geostatistical data generated by the function grf.

Usage

plot.grf(obj, model.line = TRUE, plot.grid = FALSE,
         ylim = "default", ...)

Arguments

obj

an object of the class grf, typically an output of the function grf.

model.line

logical. If TRUE the true variogram model is added to the plot with the sample variogram(s).

plot.grid

logical. If TRUE a plot with data locations is also shown.

ylim

limits for the y-axis. The default is the maximum value of the variogram among all of the simulations.

...

further arguments to be passed to the functions variog and plot.

Value

• A plot with the empirical variogram(s) is produced on the output device. No values are returned.

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, plot.variogram for plotting empirical variogram, variog for computation of empirical variograms and plot for the generic plotting function.

Examples

par(mfrow=c(2,1))
sim1 <- grf(100, cov.pars=c(10, .25))
# generates simulated data
plot(sim1, grid=T)
# plots the locations and the sample true variogram model
#
par(mfrow=c(1,1))
sim2 <- grf(100, cov.pars=c(10, .25), nsim=10)
# generates 10 simulated data
plot(sim1)
# plots sample variograms for all simulations with the true model