Level 2 Heading

Below is an R chunk showing the structure.

data(iris)
str(cars)

## 'data.frame':    50 obs. of  2 variables:
##  $ speed: num  4 4 7 7 8 9 10 10 10 11 ...
##  $ dist : num  2 10 4 22 16 10 18 26 34 17 ...

Table

Below is an R chunk showing a table.

Below is a table.

head(cars)

##   speed dist
## 1     4    2
## 2     4   10
## 3     7    4
## 4     7   22
## 5     8   16
## 6     9   10

Plots

Here is a basic R plot.

plot(cars$speed,cars$dist)

Image

The default usage does not work well because the image is too big.

![](rr_lab_assets/gotland.jpg)

So, we use HTML directly like this:

<img src="rr_lab_assets/gotland.jpg" width="250px">