inla.barrier {INLA} | R Documentation

## Functions for defining the Barrier models

### Description

Functions for defining Barrier models as an `inla rgeneric` model

### Usage

     inla.barrier.pcmatern(mesh, barrier.triangles, prior.range,
                           prior.sigma, range.fraction=0.2)
     inla.barrier.polygon(mesh, barrier.triangles, Omega=NULL)
     inla.barrier.q(fem, ranges, sigma=1)
     inla.barrier.fem(mesh, barrier.triangles, Omega=NULL)

### Arguments

`mesh` | The mesh to build the model on, from inla.mesh.2d
`barrier.triangles` | The numerical ids of the triangles that make up the barrier area
`prior.range` | 2 parameters `(range0,Prange)` for the prior spatial range. If `Prange` is `NA`, then `range0` is used as a fixed range value (TODO).
`prior.sigma` | 2 parameters `(sig0,Psig)` for the prior marginal standard deviation sigma. If `Psig` is `NA`, then `sig0` is used as a fixed sigma value (TODO).
`range.fraction` | The length of the spatial range inside the barrier area, as a fraction of the range parameter.
`Omega` | Advanced option for creating a set of permeable barriers (not documented)

### Details

This model is described in the ArXiv preprint arXiv:1608.03787. For examples, see https://haakonbakka.bitbucket.io/btopic107.html.

### Value

`inla.barrier.pcmatern` gives the (rgeneric) model object for fitting the model in INLA, `inla.barrier.polygon` gives the polygon around the barrier (mainly for plotting), `inla.barrier.q` is an internal method producing the Q matrix from a result of inla.barrier.fem, `inla.barrier.fem` is an internal method producing the Finite Element matrices.

### Author(s)

Haakon Bakka bakka@r-inla.org

### See Also

inla.spde2.pcmatern

[Package INLA version 18.07.12 Index]