potential.kriging {RGeostats} | R Documentation |
Estimation using the Potential Method
potential.kriging(db, dbgrd, dbout, dbtgt = NA, model = model.input(), neigh = neigh.input(), degree = 0, nugget.grd = 0, nugget.tgt = 0, zmin=0, zmax=100, znumber=10, flag.up = TRUE, flag.grad = FALSE, flag.trans=TRUE, flag.part = 0, verbose = FALSE, radix = "Potential", modify.target = db.locmod())
db |
The |
dbgrd |
The |
dbout |
The |
dbtgt |
The |
model |
The
An additional nugget effect is also authorized. |
neigh |
The |
degree |
Degree of the Intrinsic Random Function used to describe the Potential Random Variable. Note that the degree must be 2 if the model contains the 2nd order Spline Generalized Covariance. |
nugget.grd |
The value of the nugget effect on the Gradient component |
nugget.tgt |
The value of the nugget effect on the Tangent component |
zmin |
In the Interpolation Mode (see comments on 'dbout'), this values gives the minimum for interpolating the elevation of the different isolines. |
zmax |
In the Interpolation Mode (see comments on 'dbout'), this values gives the maximum for interpolating the elevation of the different isolines. |
znumber |
In the Interpolation Mode (seed comments on 'dbout'), the search interval (between 'zmin' and 'zmax') is sampled at 'znumber' regularly spaced points to speed up the search. |
flag.up |
In the Interpolation Mode (seed comments on 'dbout'), the search is performed going from z_min up to z_max when 'flag.up' is TRUE; otherwise the search is performed downwards. |
flag.grad |
When TRUE, the estimation of the potential is calculated together with the gradient components. When FALSE, only the potential estimation is calculated. |
flag.trans |
When TRUE, the estimation is returned as the layer rank; otherwise the estimation is provided as the potential value. |
flag.part |
The user may decompose the contribution of the different elements in the potential estimation. This parameters must be specified as follows:
By linearity, the sum of all the components (flag.part>0) should be equal to the potential estimation (flag.part==0). |
verbose |
Verbose option |
radix |
Radix of the name given to the variables storing the results in the target Db. |
modify.target |
Decides whether or not the newly created variables will have their
locator defined or not. For more information, see |
The target Db where the following variables have been added:
the estimation variable
the gradient estimation variables (if flag.grad=TRUE)