| Error {demest} | R Documentation |
Priors for main effects or interactions, such as age effects or
age-sex interactions, typically include an error term. The error
terms can be specified using function Error.
Error(robust = FALSE, df = 4, scale = HalfT())
robust |
Whether to use a t distribution. Defaults to
|
df |
The degrees of freedom for the t distribution. Defaults to 4. |
scale |
Prior for the |
If robust = FALSE (the default), then the error term has a normal
distribution,
error[j] ~ N(0, scale^2).
The scale parameter has a half-t prior, which is described in the
documentation for function HalfT.
If robust = TRUE, then, by default, the error term has a t
distribution with 4 degrees of freedom,
error[j] ~ t(4, 0, scale^2).
Users can supply alternative values for the degrees of freedom.
The scale parameter has a half-t prior, described
in the documentation for HalfT.
An object of class Error
Error() Error(robust = TRUE) Error(robust = TRUE, df = 10) Error(scale = HalfT(scale = 0.5, max = 1)) Error(scale = HalfT(mult = 0.5))