Lattice grids for inla.mesh

Description

since ⁠23.08.18⁠. Use fmesher::fm_lattice_2d() instead.

Construct a lattice grid for inla.mesh()

Usage

inla.mesh.lattice(
  x = seq(0, 1, length.out = 2),
  y = seq(0, 1, length.out = 2),
  z = NULL,
  dims = if (is.matrix(x)) {
     dim(x)
 } else {
     c(length(x), length(y))
 },
  units = NULL,
  crs = NULL
)

Arguments

Value

An inla.mesh.lattice object.

Author(s)

Finn Lindgren finn.lindgren@gmail.com

See Also

inla.mesh()

Examples

lattice <- inla.mesh.lattice(seq(0, 1, length.out = 17), seq(0, 1, length.out = 10))

## Use the lattice "as-is", without refinement:
mesh <- inla.mesh.create(lattice = lattice, boundary = lattice$segm)
mesh <- inla.mesh.create(lattice = lattice, extend = FALSE)
plot(mesh)

## Refine the triangulation, with limits on triangle angles and edges:
mesh <- inla.mesh.create(
  lattice = lattice,
  refine = list(max.edge = 0.08),
  extend = FALSE
)
plot(mesh)

## Add an extension around the lattice, but maintain the lattice edges:
mesh <- inla.mesh.create(
  lattice = lattice,
  refine = list(max.edge = 0.08),
  interior = lattice$segm
)
plot(mesh)

## Only add extension:
mesh <- inla.mesh.create(lattice = lattice, refine = list(max.edge = 0.08))
plot(mesh)