Extract a Parameter Summary from a Stan Object — extract_stan

Extracts summarised parameter posteriors from a stanfit object using rstan::summary() in a format consistent with other summary functions in {EpiNow2}.

Usage

extract_stan_param(
  fit,
  params = NULL,
  CrIs = c(0.2, 0.5, 0.9),
  var_names = FALSE
)

Arguments

fit: A <stanfit> objec.
params: A character vector of parameters to extract. Defaults to all parameters.
CrIs: Numeric vector of credible intervals to calculate.
var_names: Logical defaults to FALSE. Should variables be named. Automatically set to TRUE if multiple parameters are to be extracted.

Value

A <data.table> summarising parameter posteriors. Contains a following variables: variable, mean, mean_se, sd, median, and lower_, upper_ followed by credible interval labels indicating the credible intervals present.