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Initial release: a portable Stan-backend layer that a Stan-based R package can fit its models through, using either rstan (default) or, optionally, cmdstanr.
stan_options() collects and validates sampler options
for the chosen backend, forwarding them verbatim and guarding against
mixing one backend’s argument vocabulary into the other.fit_model() dispatches a fit to the backend recorded on
the options and resolves the calling package’s compiled model
automatically.backend_draws_array(),
backend_extract(),
backend_generate_quantities(), and
backend_has_draws().use_flexstanr() wires flexstanr into a host package’s
DESCRIPTION.requireNamespace() guards; rstan is the default and only
hard Stan dependency.These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.