rstantools (version 1.5.0)

log_lik: Generic function for pointwise log-likelihood

Description

We define a new function log_lik rather than a 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 log_lik.stanreg in the rstanarm package for an example.

Usage

log_lik(object, ...)

Arguments

object

The object to use.

...

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

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 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 http://mc-stan.org/rstantools/articles/.

Examples

# NOT RUN {
# See help("log_lik", package = "rstanarm")

# }