R: Semivariance Values For a Given Variogram Model
variogramLine
R Documentation
Semivariance Values For a Given Variogram Model
Description
Generates a semivariance values given a variogram model
Usage
variogramLine(object, maxdist, n = 200, min = 1.0e-6 * maxdist,
dir = c(1,0,0), covariance = FALSE, ..., dist_vector, debug.level = 0)
Arguments
object
variogram model for which we want semivariance function values
maxdist
maximum distance for which we want semivariance values
n
number of points
min
minimum distance; a value slightly larger than zero is usually
used to avoid the discontinuity at distance zero if a nugget component is
present
dir
direction vector: unit length vector pointing the direction in
x (East-West), y (North-South) and z (Up-Down)
covariance
logical; if TRUE return covariance values, otherwise
return semivariance values
...
ignored
dist_vector
numeric vector or matrix with distance values
debug.level
gstat internal debug level
Value
a data frame of dimension (n x 2), with columns distance and gamma
(semivariances or covariances), or in case dist_vector is a matrix, a
conforming matrix with semivariance/covariance values is returned.
Note
variogramLine is used to generate data for plotting a variogram model.