See prior_summary.stanreg() in the rstanarm package for an example.

prior_summary(object, ...)

# S3 method for default
prior_summary(object, ...)



The object to use.


Arguments passed to methods. See the methods in the rstanarm package for examples.


prior_summary() methods should return an object containing information about the prior distribution(s) used for the given model. The structure of this object will depend on the method.

The default method just returns object$, which is NULL if there is no '' element.

See also

  • Guidelines and recommendations for developers of R packages interfacing with Stan and a demonstration getting a simple package working can be found in the vignettes included with rstantools and at


# See help("prior_summary", package = "rstanarm")