Description

We define a new function log_lik() rather than a stats::logLik() method because (in addition to the conceptual difference) the documentation for logLik() states that the return value will be a single number, whereas log_lik() returns a matrix. See the log_lik.stanreg() method in the rstanarm package for an example of defining a method.

Usage

Arguments

Value

log_lik() methods should return a S by N matrix, where S is the size of the posterior sample (the number of draws from the posterior distribution) and N is the number of data points.

See Also

• 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.

Examples