The $constrain_variables() method transforms input parameters to the constrained scale

constrain_variables(
  unconstrained_variables,
  transformed_parameters = TRUE,
  generated_quantities = TRUE
)

Arguments

unconstrained_variables

(numeric) A vector of unconstrained parameters to constrain.

transformed_parameters

(boolean) Whether to return transformed parameters implied by newly-constrained parameters (defaults to TRUE).

generated_quantities

(boolean) Whether to return generated quantities implied by newly-constrained parameters (defaults to TRUE).

Examples

# \dontrun{
fit_mcmc <- cmdstanr_example("logistic", method = "sample")
fit_mcmc$init_model_methods()
#> Error: Model methods cannot be used with a pre-compiled Stan executable, the model must be compiled again
fit_mcmc$constrain_variables(unconstrained_variables = c(0.5, 1.2, 1.1, 2.2))
#> Error: The method has not been compiled, please call `init_model_methods()` first
# }