ganiso_d function

Anisotropic distance-related characteristics

Computes necessary distance-related characteristics when there is geometric anisotropy. This is essentially an internal function to evaluate a cmodStd object produced by cmod_std

when the anisotropy ratio differs from 1.

ganiso_d(coords1, coords2, radians = TRUE, invert = TRUE)

Arguments

• coords1: An $N \times 2$ matrix of spatial coordinates.
• coords2: An $M \times 2$ matrix of spatial coordinates. Is missing, then coords2 = coords1.
• radians: A logical value indicating whether the angles returned should be in degrees or radians. The default is FALSE, indicating that the returned angles are in degrees.
• invert: A logical value indicating whether the axes of the coordinates should be inverted (i.e., the x- and y-axis are switched). The default is TRUE to mimic results from other geostatistical R packages like gstat, geoR, and other software like GSLIB and GeoEAS. Set to FALSE to use the typical x- and y-axes.

Returns

A ganisoD object with components d

and angles, which is the distance matrix between the coordinates and the angles between the coordinates. The angles are returned in radians.

Examples

ganiso_d(cbind(0, 0), cbind(1, 1))