---
title: The `code` option
---

Define a code template `tpl`:

```{r}
tpl    = 'lm(mpg ~ %s, data = mtcars) |> summary() |> coef()'
x_vars = names(mtcars)[2:4]
```

We run regressions on three variables one by one:

<!-- ... -->

```{r, code = sprintf(tpl, x_vars)}
```