ABSTRACT
For those who are not familiar with software packages required for using R Markdown,we give a brief introduction to the installation andmaintenance of these packages.
A.1 R and R packages
R can be downloaded and installed from any CRAN (the Comprehensive R Archive Network)mirrors, e.g., https://cran.rstudio.com. Please note that therewill be a fewnewreleases ofR every year, and youmaywant toupgrade R occasionally.
