This function automates fitting a variogram model to a dataset given parameters, suitable for various commodities and geological variables (e.g., grade, thickness).
Usage
fit_var(
data,
formula,
cutoff = 250,
width = 50,
model_type = "Sph",
sill = 0.02,
range = 150,
anisotropy = c(45, 0.5),
tol_hor = 22.5
)Arguments
- data
An sf object containing the drillhole or sampling data.
- formula
A formula specifying the variable to model (e.g., grade ~ 1).
- cutoff
Numeric, the maximum distance for the variogram.
- width
Numeric, the lag width for the variogram.
- model_type
Character, the type of variogram model (default "Sph" for Spherical).
- sill
Numeric, the anisotropy sill or initial sill.
- range
Numeric, the model range.
- anisotropy
Numeric vector of length 2 representing the direction and anisotropy ratio.
- tol_hor
Numeric, horizontal tolerance angle (default: 22.5).