Please download this repository and open the RStudio project file stancon2018helsinki_intro.Rproj.
In addition to the rstan package, which you should already have installed (if not see https://github.com/stan-dev/rstan/wiki/RStan-Getting-Started), please install the following packages if not already installed:
packages <- c(
'bayesplot',
'ggplot2',
'lubridate',
'rmarkdown',
'shinystan',
'tidyverse'
)
install.packages(packages)