vario.grid {RGeoS} | R Documentation |
Computes various types of experimental variograms on a regular grid.
vario.grid(db, dirincr = NA, nlag = NA, calcul = "vg", opt.code=0, tolcode=0, means=NA)
db |
The |
dirincr |
A matrix giving the grid indices for the different directions in which the variograms must be calculated. When absent or in case of error, one direction is generated for each dimension of the space. When provided as a matrix, its first dimension must be equal to the space dimension, its second dimension gives the number of directions to be calculated. When provided as a list or a single element, as many directions are generated as there are elements in the list: the element in the list is considered as the angles of a rotation in the XoY plane. |
nlag |
A vector containing the number of lags per direction. If a constant is provided, it will serve for all the directions. |
calcul |
Character string giving the type of structure to compute:
|
opt.code |
Option concerning the sample codes for constituting pairs:
|
tolcode |
Maximum distance between the codes of the two samples. |
means |
Array corresponding to the estimated means of the variable using for the Poisson variogram calculation |
An experimental vario-class
structure.