Default method for families which do not require a reparameterisation

This function extracts the Stan parameterisation for a given brms family by creating a dummy model and parsing its Stan code. It looks for the log probability density function (lpdf) call in the Stan code and extracts the parameter order used by Stan. This is needed because brms and Stan may use different parameter orderings for the same distribution.

Usage

# Default S3 method
epidist_family_param(family, ...)

Arguments

family

A brms family object containing at minimum a family element specifying the distribution family name.

...

Additional arguments passed to methods (not used)

Value

The input family object with an additional param element containing the Stan parameter ordering as a string

Details

The function works by:

1. Creating a minimal dummy model using the specified family

2. Extracting the Stan code for this model

3. Finding the lpdf function call for the family

4. Parsing out the parameter ordering used in Stan

5. Adding this as the param element to the family object

See also

Other family: epidist_family(), epidist_family_model(), epidist_family_model.default(), epidist_family_param()