1 Introduction:

1.1 What is Markdown and R markdown?

Markdown (John Gruber, https://daringfireball.net/projects/markdown) is a different way to write documents that include computer code. … R markdown is a particular kind of markdown document. — Paul Johnson (“R Markdown Basics”)

1.2 How can I use R markdown?

R Studio is the preferred one because I personally can’t study when my web browser remains open 😅

1.3 What’s the relationship between R and R Studio ?

+ =

R Studio is a masking software of R, which means R is a necessary software for R Studio

2 Preparation:

2.1 Step 1, Of course, you need to install R and R Studio first:

R (free and comes with ABSOLUTELY NO WARRANTY): https://cran.r-project.org/mirrors.html

R Studio (free version is good enough for now): https://www.rstudio.com/products/rstudio/download/

2.2 Step 2, Copy and paste the code below to download the rmarkdown package in R Studio console (one time):

install.packages("rmarkdown")

Or just simply do step 3, where R Studio will automatically download it for you, but you still can use this code above in your console to show off a bit

2.3 Step 3, creating a new R Markdown file:

2.4 Step 4, output options:

PDF and Word output require extension software support. For instance, PDF output requaires you to have $\LaTeX$ installed and Word output requires Microsoft Word installed

You can either install the full $\LaTeX$ application (Mac user: MacTeX; Windows user: MiKTeX) or simply use the command below to download a light version of $\LaTeX$:

install.packages("tinytex")
tinytex::install_tinytex()

3 R Markdown Screenshot:

4 Useful code:

Header:

# Header 1
## Header 2
### Header 3
#### Header 4
##### Header 5
###### Header 6

bold and italics:

This is *Rmarkdown*!

This is _Rmarkdown_!

This is **Rmarkdown**!

This is **_R_ markdown**!

This is *R~~markdown~~*!

List:

* unordered list
* item 2
    + sub-item 1
    + sub-item 2
1. ordered list
2. item 2
    + sub-item 1
    + sub-item 2

$\LaTeX$:

\begin{equation}
e^{ix} = \cos x + i \sin x
\end{equation}

Inline $\LaTeX$:

$\LaTeX$ is too easy for me!

$\LaTeX$ is too easy for me!

R code:

t <- "This class is my favourite course!!!"
print(t)

## [1] "This class is my favourite course!!!"

5 Generating a report:

Of course, you can always change the type of the output format later

References and hyperlinks:

1. [R Markdown Cheat Sheet](https://www.rstudio.com/wp-content/uploads/2015/02/rmarkdown-cheatsheet.pdf)
2. [R Markdown Reference Guide](https://www.rstudio.com/wp-content/uploads/2015/03/rmarkdown-reference.pdf)
3. [R Studio ![](images/rstudio_logo.png){width=25px}: R Markdown Quick Tour](https://rmarkdown.rstudio.com/authoring_quick_tour.html)
4. [R Markdown: The Definitive Guide, by _Yihui Xie, J. J. Allaire, Garrett Grolemund_](https://bookdown.org/yihui/rmarkdown/)
5. [R Markdown Basics, by _Paul Johnson _](https://cran.r-project.org/web/packages/stationery/vignettes/Rmarkdown.pdf)
6. [Homepage of the author with numerous important R packages like _knitr_, Yihui Xie](https://yihui.name)