This function computes the empirical variogram.
variogram(data, coord, n.bins, xlab, ylab, angles = NULL, add = FALSE, xlim = c(0, max(dist)), ...)
A matrix representing the data. Each column corresponds to one location.
A matrix that gives the coordinates of each location. Each row corresponds to one location.
The number of bins to be used. If missing, pairwise madogram estimates will be computed.
The x-axis and y-axis labels. May be missing. Note that ylab must have the same length has which.
ylab
which
A numeric vector. A partition of the interval \((0, \pi)\) to help detecting anisotropy.
Logical. If TRUE, the plot is added to the current figure; otherwhise (default) a new plot is computed.
TRUE
A numeric vector of length 2 specifying the x coordinate range.
Additional options to be passed to the plot function.
plot
A graphic and (invisibly) a matrix with the lag distances and the empirical variogram estimates.
fmadogram, lmadogram
fmadogram
lmadogram
# NOT RUN { n.site <- 20 n.obs <- 100 coord <- matrix(runif(2 * n.site, 0, 10), ncol = 2) data <- rgp(n.obs, coord, "powexp", sill = 2, range = 3, smooth = 1) variogram(data, coord) # }
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