Extract the posterior draws of the conditional expectation. See the rstanarm package for an example.
posterior_epred(object, ...)The object to use.
Arguments passed to methods. See the methods in the rstanarm package for examples.
posterior_epred() methods should return a \(D\) by \(N\)
matrix, where \(D\) is the number of draws from the posterior
distribution distribution and \(N\) is the number of data points.
The rstanarm package (mc-stan.org/rstanarm) for example methods (CRAN, GitHub).
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 mc-stan.org/rstantools/articles.