vmap.auto {RGeostats}R Documentation

Automatic Model Fitting on Variogram Map

Description

Automatic Model Fitting on Variogram Map

Usage

vmap.auto(dbmap, struct = melem.name(c(1,4,5,2,3)), constraints=NA,
          auth.aniso = TRUE, auth.rotation = TRUE, 
          auth.locksame = FALSE, auth.lock2d = FALSE, flag.goulard=TRUE,
          flag.noreduce = FALSE, flag.norm.sill=FALSE,flag.keep.intstr=FALSE,
          param = NA, lower = NA, upper = NA, equal = NA, draw = TRUE, 
          maxiter = 100, verbose=0, tolstop = 1.e-5, 
          epsdelta = 1.e-5, tolsigma = 5, delta=1)

Arguments

dbmap

The db-class containing the result of the Variogram Map (stored as 'z' variables)

struct

List of basic structures to be used

constraints

Vector giving the constraints on the sills of the model. This vector must be dimensionned to the number of variables in the variogram. All the defined terms must be positive. Otherwise, no constraints is applied on the Sill estimation. This is incompatible with the 'flag.norm.sill' flag.

auth.aniso

When TRUE, the anisotropy will be checked

auth.rotation

When TRUE, the fit will look for rotation in anisotropy

auth.locksame

When TRUE and if an anisotropy is allowed (auth.aniso), all the basic structures should share the same rotation.

auth.lock2d

When TRUE, the anisotropy rotation will only consider a rotation around the Z-axis. The Dip and Plunge angles are kept equal to zero.

flag.goulard

When TRUE, the Goulard algorithm is used for the determination of the Sills (quicker). Otherwise Sills are infered using the standard Foxleg algorithm.

flag.noreduce

When TRUE, the useless basic structures must not be discarded.

flag.norm.sill

When TRUE, the automatic fit must fulfill the constraint that the sum of the sills must always be equal to 1

flag.keep.intstr

When TRUE, the fitting procedure must always maintain at least one intrinsic basic structure. If no intrinsic basic structure is provided in the initial template, the automatic fitting procedure fails.

param

List of initial values for the parameters to be fitted For details see model.param.define.

lower

List of lower bounds for the parameters to be fitted For details see model.param.define.

upper

List of upper bounds for the parameters to be fitted For details see model.param.define.

equal

List of equalities for the parameters to be fitted For details see model.param.define.

draw

When TRUE, both the experimental variograms and the Model are represented graphically. Otherwise, no graphic is produced.

maxiter

Maximum number of iterations

verbose

Verbose option

  • 1 Indications are given regarding the convergence of the algorithm used for automatic model fitting.

  • 0 No message is printed except the warning when convergence is not reached

  • -1 Silent mode

tolstop

Tolerance for the distance between the experiment and the model.

epsdelta

Tolerance for the direction increment used in the gradient search

tolsigma

Percentage of the variance below which a basic structure will be discarded

delta

Delta value

Value

The model-class with fitted parameters


[Package RGeostats version 11.0.6 Index]