inla.spde.precision {INLA} | R Documentation

## Precision matrices for SPDE models

### Description

Calculates the precision matrix for given parameter values based on an `inla.spde` model object.

### Usage

    inla.spde.precision(...)

    ## S3 method for class 'inla.spde2'
    inla.spde.precision(spde,
                        theta = NULL,
                        phi0 = inla.spde2.theta2phi0(spde, theta),
                        phi1 = inla.spde2.theta2phi1(spde, theta),
                        phi2 = inla.spde2.theta2phi2(spde, theta), ...)
    inla.spde2.precision(spde,
                         theta = NULL,
                         phi0 = inla.spde2.theta2phi0(spde, theta),
                         phi1 = inla.spde2.theta2phi1(spde, theta),
                         phi2 = inla.spde2.theta2phi2(spde, theta), ...)

    ## For deprecated inla.spde1 models:
    ## S3 method for class 'inla.spde1'
    inla.spde.precision(spde, ...)
    inla.spde1.precision(spde, ...)

### Arguments

`spde` | An `inla.spde` object.
`theta` | The parameter vector.
`phi0` | Internal parameter for a generic model. Expert option only.
`phi1` | Internal parameter for a generic model. Expert option only.
`phi2` | Internal parameter for a generic model. Expert option only.
`...` | Additional parameters passed on to other methods.

### Value

A sparse precision matrix.

### Author(s)

Finn Lindgren finn.lindgren@gmail.com

### See Also

`inla.spde.models`, `inla.spde2.generic`, `inla.spde2.theta2phi0`, `inla.spde2.theta2phi1`, `inla.spde2.theta2phi2`

[Package INLA version 18.07.12 Index]