Description Usage Arguments Details Value See Also Examples

Set up an spatial simultaneous autoregressive (SAR) term in brms. The function does not evaluate its arguments – it exists purely to help set up a model with SAR terms.

1 |

`M` |
An object specifying the spatial weighting matrix.
Can be either the spatial weight matrix itself or an
object of class |

`type` |
Type of the SAR structure. Either |

The `lagsar`

structure implements SAR of the response values:

*y = ρ W y + η + e*

The `errorsar`

structure implements SAR of the residuals:

*y = η + u, u = ρ W u + e*

In the above equations, *η* is the predictor term and *e* are
independent normally or t-distributed residuals. Currently, only families
`gaussian`

and `student`

support SAR structures.

An object of class `'sar_term'`

, which is a list
of arguments to be interpreted by the formula
parsing functions of brms.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ```
## Not run:
data(oldcol, package = "spdep")
fit1 <- brm(CRIME ~ INC + HOVAL + sar(COL.nb, type = "lag"),
data = COL.OLD, data2 = list(COL.nb = COL.nb),
chains = 2, cores = 2)
summary(fit1)
plot(fit1)
fit2 <- brm(CRIME ~ INC + HOVAL + sar(COL.nb, type = "error"),
data = COL.OLD, data2 = list(COL.nb = COL.nb),
chains = 2, cores = 2)
summary(fit2)
plot(fit2)
## End(Not run)
``` |

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