The easiest way to execute an example is via thestan_demo() function, such as

library(rstan)options(mc.cores=parallel::detectCores())rstan_options(auto_write=TRUE)dogs<- stan_demo("dogs")dogs

Ifstan_demo() is called without any arguments, then a text menu will pop up listing the (more than 500) examples that can be run (although a handful do not work at any particular time)