---
title: "Cours magistral + exercices"
---

## Theorie

Texte de cours ici.

```{r concept_demo}
mean(c(1, 2, 3, 4))
```

```{r concept_apply}
# tutorizeR: exercise-only, hints=Pensez a la variance
df <- data.frame(x = 1:10)
var(df$x)
```
