This function takes the provided [rbi::bi_model()] and adds a generic Gaussian proposal distribution.
update_proposal(model, truncate = TRUE, blocks = c("parameter", "initial"))
the updated bi model
a [rbi::bi_model()] object
truncate the multivariate normal proposals according to the used priors, e.g. truncating a parameter with beta prior at 0 and 1
blocks to use (out of "parameter" and "initial")