This is a section.

This is a subsection.

This is how you can embed an R code chunk:

```
library(ggplot2)
data(mtcars)
ggplot(mtcars, aes(mpg, wt)) + geom_point() + geom_smooth()
```

```
library(swirl)
library(foreign)
library(lintr)
library(rmarkdown)
library(ggplot2)
library(dplyr)
library(tidyr)
```

This is how you can run in-line R code. The product of `3`

and `4`

is 12.

End a line with two spaces to start a new paragraph.

This is how you write *italics* (or *italics*), **bold**, `verbatim code`

, subscript_{2}, superscript^{2}, endash: –, and emdash: —.

An equation looks like this: \(A = \pi \times r^{2}\)

An equation block looks like this: \[E = mc^{2}\]

An array of aligned equations looks like this:

\[\begin{eqnarray} 1 + 1 & = & 2\\ 1001 + 1 & < & 200000 \end{eqnarray}\]This is how you make a comment that will not show in the output document:

This is how you create a link: http://www.rstudio.com or link

This is an unordered list:

- item 1
- sub-item 1 (indent 4 spaces)
- sub-item 2
- sub-sub-item 1 (indent 8 spaces)

- item 2 (add 2 spaces)

Continued (indent 4 spaces)

This is an ordered list:

- item 1
- item 2
- sub-item 1 (indent 4 spaces) (add 2 spaces)

A. sub-sub-item 1 (indent 8 spaces)

- sub-item 1 (indent 4 spaces) (add 2 spaces)

**RMarkdown is very case sensitive. Every indented / added space and every empty line matters.**