There is a huge number of extentions to R, providing additional functions (sometimes with conflicting names). The ones listed here are optional but useful.

R Markdown

The package rmarkdown allows you to mix text with R-code and its output in the same document. The pages R intro 3. Basic calculations and R intro 4. Matrices were produced using R Markdown.

Go through “Get Started” at https://rmarkdown.rstudio.com/.

If you want to use it to, e.g., produce your project reports, you must first install the rmarkdown package using Tools -- Install Packages....

Create a new document with File -- New File -- R Markdown...

If you want to use the pdf format you need a LaTeX installation on your computer. Otherwise, you can use the Word format and then produce the pdf from the Word ﬁle, in whatever way you usually do that. In order to compile the document you should “knit” it by pressing the Knit button. It looks like a ball of yarn with a knitting needle stuck through it.

knitr (New 22/4)

The knitr package can do a lot of things. Most useful here is the command

purl("myfile.rmd")

that lets you extract the R-code from the Rmarkdown file. See instructions on

https://felixfan.github.io/extract-r-code/