lines.variomodel.likGRF: Adds a Variogram Line to a Variogram Plot
In rundel/geoR: Analysis of Geostatistical Data

Description Usage Arguments Details Value Author(s) References See Also Examples

This function adds a fitted variogram based on the estimates of the model parameters returned by the function likfit to a current variogram plot.

1 2	## S3 method for class 'likGRF' lines.variomodel(x, max.dist, scaled = FALSE, ...)

`x`	an object of the class `likGRF` which is a list containing information about the fitted model parameters, typically an output of the function `likfit`.
`max.dist`	maximum distance (x-axis) to compute and draw the line representing the variogram model. The default is the distance given by `obj$max.dist`.
`scaled`	logical. If `TRUE` the total sill in the plot is equals to 1.
`...`	arguments to be passed to the function `curve`.

Adds variogram model(s) to a plot. In conjuction with plot.variogram can be used to compare sample variograms against fitted models returned by likfit.

A line with a variogram model is added to a plot on the current graphics device. No values are returned.

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

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

lines.variomodel, lines.variomodel.variofit, plot.variogram, lines.variogram, variofit, likfit, curve.

# compute and plot empirical variogram
vario <- variog(s100, max.dist = 1)
plot(vario)
# estimate parameters
vario.ml <- likfit(s100, ini = c(1, .3), fix.nugget = TRUE)
# adds fitted model to the plot  
lines(vario.ml)