idx {INLA} | R Documentation

## Convert indexes

### Description

Convert indexes given by to triplet ‘(idx, group, replicate)’ to the (one-dimensional) index used in the grouped and replicated model

### Usage

    inla.idx(
      idx,
      n = max(idx),
      group = rep(1, length(idx)),
      ngroup = max(group),
      replicate = rep(1, length(idx)),
      nrep = max(replicate)
    )

### Arguments

`idx` | The index within the basic model. (Legal values from `⁠1' to ⁠`n'.)
`n` | The length ‘n’ of the basic model.
`group` | The index within group. (Legal values from `⁠1' to ⁠`ngroup'.)
`ngroup` | Number of groups.
`replicate` | The index within replication. (Legal values from `⁠1' to ⁠`nrep'.)
`nrep` | Number of replications.

### Value

`inla.idx` returns indexes in the range `⁠1' to ⁠`nngroupnrep' representing where the triplet ‘(idx,group,replicate)’ is stored internally in the full grouped and replicated model.

### Author(s)

Havard Rue hrue@r-inla.org

### Examples

    ##TODO

[Package INLA version 26.08.22 Index]