R: Finite element matrices

inla.mesh.fem {INLA}

R Documentation

Finite element matrices

Constructs finite element matrices for inla.mesh and inla.mesh.1d objects.

## 2D and 1D meshes
inla.mesh.fem(mesh, order = 2)

## 1D meshes, order 2 models only
inla.mesh.1d.fem(mesh)

`mesh`	An `inla.mesh` or `inla.mesh.1d` object.
`order`	The model order.

A list of sparse matrices based on basis functions psi_i:

`c0`	`c0[i,j] = < psi_i, 1 >`
`c1`	`c1[i,j] = < psi_i, psi_j >`
`g1`	`g1[i,j] = < grad psi_i, grad psi_j >`
`g2`	`g2 = g1 * c0^-1 * g1`
`gk`	`gk = g1 * (c0^-1 * g1)^(k-1)`, up to and including `k=order`

[Package INLA version 20.07.12 Index]