Get verbatim R chunks in R Markdown

Jenny Bryan
18 September, 2014

My periodic revisitation of "how can I include a verbatim R chunk in .rmd"? This time I am writing it down! Various proposed solutions:

From the knitr FAQ:

 ```{r label, what=ever}

From issue 443

```{r foo}
print('hello world!')
```

From knitr example 065, involving inline R code:

```{r eval=TRUE}
n = 10
rnorm(x)
```

Also from knitr example 065, involving a zero-width space:

`�``{r eval=TRUE}
n = 10
rnorm(n)
```

From Karl Broman, involving <pre> and <code> tags:

```{r whatever}
data(cars)
summary(cars)
```