Chapter 1 Installation
We assume you have already installed R (https://www.r-project.org) (R Core Team 2021) and the RStudio IDE (https://www.rstudio.com). RStudio is not required but recommended, because it makes it easier for an average user to work with R Markdown. If you do not have RStudio IDE installed, you will have to install Pandoc (http://pandoc.org), otherwise there is no need to install Pandoc separately because RStudio has bundled it. Next you can install the rmarkdown package in R:
# Install from CRAN install.packages('rmarkdown') # Or if you want to test the development version, # install from GitHub if (!requireNamespace("devtools")) install.packages('devtools') ::install_github('rstudio/rmarkdown')devtools
If you want to generate PDF output, you will need to install LaTeX. For R Markdown users who have not installed LaTeX before, we recommend that you install TinyTeX (https://yihui.name/tinytex/):
install.packages('tinytex') ::install_tinytex() # install TinyTeXtinytex
TinyTeX is a lightweight, portable, cross-platform, and easy-to-maintain LaTeX distribution. The R companion package tinytex (Xie 2021d) can help you automatically install missing LaTeX packages when compiling LaTeX or R Markdown documents to PDF, and also ensures a LaTeX document is compiled for the correct number of times to resolve all cross-references. If you do not understand what these two things mean, you should probably follow our recommendation to install TinyTeX, because these details are often not worth your time or attention.
With the rmarkdown package, RStudio/Pandoc, and LaTeX, you should be able to compile most R Markdown documents. In some cases, you may need other software packages, and we will mention them when necessary.