R: Compute various mesh related quantities.

inla.fmesher.smorg {INLA}

R Documentation

Compute various mesh related quantities.

Description

Low level function for computing finite element matrices, spherical harmonics, B-splines, and point mappings with barycentric triangle coordinates.

Usage

inla.fmesher.smorg(
  loc,
  tv,
  fem = NULL,
  aniso = NULL,
  gradients = FALSE,
  sph0 = NULL,
  sph = NULL,
  bspline = NULL,
  points2mesh = NULL,
  splitlines = NULL,
  output = NULL,
  keep = FALSE
)

Arguments

`loc`	3-column triangle vertex coordinate matrix.
`tv`	3-column triangle vertex index matrix.
`fem`	Maximum finite element matrix order to be computed.
`aniso`	A two-element list with `\gamma` and `v` for an anisotropic operator `\nabla\cdot H \nabla`, where `H=\gamma I + v v^\top`
`gradients`	When `TRUE`, calculate derivative operator matrices `dx`, dy, and dz.
`sph0`	Maximal order of rotationally invariant spherical harmonics. Deprecated. Use `inla.mesh.basis()` instead.
`sph`	Maximal order of general spherical harmonics. Deprecated. Use `inla.mesh.basis()` instead.
`bspline`	Rotationally invariant B-splines on a sphere. 3-vector with number of basis functions `n`, basis degree `degree`, and a logical; `TRUE` uniform knot angles, `FALSE` for uniform spacing in `\sin(latitude)`.
`points2mesh`	3-column matrix with points to be located in the mesh.
`splitlines`	A list with elements `loc` (3-column coordinate matrix) and `idx` (2-column index matrix) describing line segments that are to be split into sub-segments at triangle boundaries.
`output`	Names of objects to be included in the output, if different from defaults.
`keep`	When `TRUE`, for debugging purposes keep the `fmesher` I/O files on disk.

Value

A list of generated named quantities.

Author(s)

Finn Lindgren finn.lindgren@gmail.com

[Package INLA version 23.06.29 Index]