These functions are deprecated and will be removed in a future release. The Arguments section below provides details on how the functionality obtained via each of the arguments has been replaced.
prior_options(
  prior_scale_for_dispersion = 5,
  min_prior_scale = 1e-12,
  scaled = TRUE
)Arguments to 
deprecated prior_options function. The functionality provided 
by the now deprecated prior_options function has been replaced 
as follows:
prior_scale_for_dispersionInstead of using the prior_scale_for_dispersion argument to 
 prior_options, priors for these parameters can now be 
 specified directly when calling stan_glm (or
 stan_glmer, etc.) using the new prior_aux
 argument.
scaledInstead of setting prior_options(scaled=FALSE), internal rescaling
 is now toggled using the new autoscale arguments to
 normal, student_t, and cauchy 
 (the other prior distributions do not support 'autoscale').
min_prior_scaleNo replacement. min_prior_scale (the minimum possible scale
 parameter value that be used for priors) is now fixed to 1e-12.