`randomEffect.Rd`

Use to set or update the covariance matrix of random effects in a model object.

```
randomEffect(
.Object,
effect,
value = NULL,
isDiagonal = TRUE,
isFrozen = FALSE,
...
)
```

- .Object
Model object

- effect
One or more names of available random effects.

- value
Initial values for the diagonal elements of the covariance matrix of random effects (if

`isDiagonal = TRUE`

, or initial values for the lower triangular elements (including diagonal elements) of the covariance matrix (if`isDiagonal = FALSE`

) in a row-wise order.- isDiagonal
Set to

`TRUE`

to if the covariance matrix of the specified random effects is a diagonal matrix. or`FALSE`

if not.- isFrozen
Set to

`TRUE`

to freeze the covariance matrix of random effects.- ...
Additional arguments