---
title: "Penguins — single-species report"
format: html
# TODO 1: Add a `params` block with `species: Gentoo` as the default.
---

```{r}
#| label: setup
#| message: false
library(dplyr)
library(ggplot2)

data(penguins)

# TODO 2: Filter for `species == params$species` as well as the missing values.
one <- penguins |>
  filter(!is.na(bill_len), !is.na(bill_dep))
```

<!-- TODO 3a: Replace "one species" with inline code that displays params$species. -->
This report covers **one species** only. The same source can render a different report when the
parameter changes.

## Species at a glance

```{r}
#| label: fig-bill
#| echo: false
#| fig-cap: "Bill length versus depth for one species."
#| fig-alt: "Scatter plot of bill depth against bill length for one penguin species."
# TODO 3b: Make `fig-cap` and `fig-alt` use `params$species` with `!expr`.
ggplot(one, aes(bill_len, bill_dep)) +
  geom_point(alpha = 0.8) +
  labs(x = "Bill length (mm)", y = "Bill depth (mm)") +
  theme_minimal(base_size = 12)
```

<!-- TODO 3c: Name the species in this sentence too. -->
`{r} nrow(one)` penguins had both bill measurements recorded.

## Session {.appendix .unnumbered}

<details>
<summary>Session info</summary>

```{r}
#| label: session
sessionInfo()
```

</details>