CCG Programs

Description Usage Arguments Details Value

varcalcR calculates experimental variograms. This process is suited to irregulalry spaced data such as samples. If more than one variable is input all possible semi-variograms and cross-variograms are calculated. Default arguments will create omni-directional 2D variograms for each variable.

varcalcR(data, vars, sysout, xyz = c("x", "y"), vpar = list(dir1 =
  c(azm = 0, azmtol = 90, bandhorz = 1e+21, dip = 0, diptol = 90, bandvert
  = 1e+21, tilt = 0, nlags = 10, lagdist = 30, lagtol = 0.5)),
  variostd = FALSE, variosills = NULL, legacy = FALSE,
  strict = TRUE, single = TRUE, debug = TRUE)

`data`	Data frame of sample data.
`vars`	Character vector, column names in `data` for variograms.
`sysout`	Character: name of GSLIB-format experimental variogram file without the extension part, and extension of ".out" is added for compatibility with `vl_lmc`.
`xyz`	Character vector, column names in `data` for coordinate fields, 2 for 2D and 3 for 3D.
`vpar`	list of named vectors containing parameters for each variogram direction to be calculated. See function argument default for spec.
`variostd`	Scalar boolean, if `TRUE` standardize the sill.
`variosills`	Numeric scalar. Sill to standardize to if `variostd` is `TRUE`. Default `NULL` means let program decide.
`legacy`	Scalar boolean, if `TRUE` output legacy format.
`strict`	Scalar boolean, if `TRUE` run input checks.
`single`	Boolean: produce a single variogram rather than direct and cross variograms.
`debug`	Scalar boolean. If `TRUE` don't delete temporary system files.

Variogram calculation parameters are provided as a list of vectors for each direction. The default list provided in the function argument list uses a named vector. The vector does not need ot me named but values must be provided in the order shown.

A data frame of class "gstat::gstatVariogram" with calculated variogram data. Side effect is output variogram calculation file from varcalc program. This file is used by other programs such as varmod.

truemoid/rgslib documentation built on May 30, 2019, 2:14 p.m.