Column access on a prior specification

A frmtmb_priorlist holds parsed specifications, and brms's prior object is a data frame of strings. $ reads the columns brms's object has, from the table as.data.frame() builds, so set_prior("normal(0, 2)", class = c("b", "sd"))$class is c("b", "sd") in both packages. The name must match a column exactly; anything else is NULL, as it is on a data frame. Assigning a column rebuilds every specification from the edited table with set_prior(), so an edit is checked as a new call would be.

Usage

# S3 method for class 'frmtmb_priorlist'
x$name

# S3 method for class 'frmtmb_priorlist'
x$name <- value

Arguments

x

A frmtmb_priorlist.

name

A column: prior, class, coef, group, resp, dpar, nlpar, lb, ub or source.

value

The new column, recycled as a data frame column is.

Value

For $, a character vector with one element per specification. For $<-, the rebuilt frmtmb_priorlist.

Examples

pr <- set_prior("normal(0, 2)", class = c("b", "sd"))
pr$class
#> [1] "b"  "sd"
pr$prior[2] <- "exponential(1)"
pr
#>           prior class coef group resp dpar nlpar   lb   ub source
#>    normal(0, 2)     b                            <NA> <NA>   user
#>  exponential(1)    sd                            <NA> <NA>   user