This function is primarily an internal helper function in jtools and
related packages to standardize the different types of formula objects used
by different types of models.
Description
Retrieve formulas from model objects
This function is primarily an internal helper function in jtools and
related packages to standardize the different types of formula objects used
by different types of models.
For brmsfit objects, the response variable for which
the formula is desired. brmsfit objects may have multiple formulas, so
this selects a particular one. If NULL, the first formula is chosen
(unless dpar is specified).
dpar
For brmsfit objects, the distributional variable for which
the formula is desired. If NULL, no distributional parameter is used.
If there are multiple responses with distributional parameters, then
resp should be specified or else the first formula will be used by
default.