Nothing

tab <- mtcars[1:10, ] boxdat <- scale(1:30)

What is the derivative of $f(x) = x^{`r 1`

} e^{`r 2`

x}$, evaluated at $x = `r 4`

$?
A formula is $$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.$$

Here comes a table

knitr::kable(tab)

Here comes some `R`

output:

t.test(1:10)

Some R code:

dat <- 1:20 s <- 0 for (i in seq_along(dat)) { s <- s + dat[i] }

Here's a boxplot

boxplot(boxdat, main = "Beauty")

A code block that is not evaluated:

variable <- rnorm(100) var(variable) mean(variable)

Try out some extra characters: Once

& Andy's book.

`r fmt(1+1e-4)`

`Hey`

- Yo
- Foo
- Bar

Some feedback.

exname: First Question extype: mchoice exsolution: 10000 exshuffle: TRUE

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