inla.spde2.matern.sd.basis {INLA} | R Documentation

## Approximate variance-compensating basis functions

### Description

Calculates an approximate basis for `tau` and `kappa` for an `inla.spde2.matern` model where `tau` is a rescaling parameter.

### Usage

    inla.spde2.matern.sd.basis(
      mesh,
      B.sd,
      B.range,
      method = 1,
      local.offset.compensation = FALSE,
      alpha = 2,
      ...
    )

### Arguments

`mesh` | An `fmesher::fm_mesh_1d()`, `fmesher::fm_mesh_2d()`, or `fmesher::fm_mesh_3d()` object.
`B.sd` | Desired basis for log-standard deviations.
`B.range` | Desired basis for spatial range.
`method` | Construction method selector. Expert option only.
`local.offset.compensation` | If `FALSE`, only compensate in the average for the `tau` offset.
`alpha` | The model `alpha` parameter.
`...` | Additional parameters passed on to internal `inla.spde2.matern` calls.

### Value

List of basis specifications

`B.tau` | Basis for `log(tau)`
`B.kappa` | Basis for `log(kappa)`

Intended for passing on to `inla.spde2.matern()`.

### Author(s)

Finn Lindgren finn.lindgren@gmail.com

### See Also

`inla.spde2.matern()`

[Package INLA version 26.02.05 Index]