vmap.calc {RGeostats}  R Documentation 
Calculate the Variogram Map for a set of variables on a set of isolated points
vmap.calc(db, dbmap = NA, nx = 10, ny = 10, dx = NA, dy = NA, calcul = "vg", radix = NA, modify.target = db.locmod())
db 
The 
dbmap 
The 
nx 
Gives the dimension of the Variogram Map along the first axis (2*nx+1) 
ny 
Gives the dimension of the Variogram Map along the second axis (2*ny+1) 
dx 
Gives the mesh of the Variogram Map along the first axis. If not provided, it is calculated as proportion of the field elongation along the first direction. 
dy 
Gives the mesh of the Variogram Map along the second axis. If not provided, it is calculated as proportion of the field elongation along the second direction. 
calcul 
Character string giving the type of structure to compute:

radix 
Radix of the name given to the variables stored in the Variogram Map Grid 
modify.target 
Decides whether or not the newly created variables will have their
locator defined or not. For more information, see 
The output consists of a new Grid Data Base with several new variables:
VMAP 
Variables containing the variogram map results 
NB 
Variables containing the number of pairs 