HDS 3.1-3.2

library(tidyverse)
library(palmerpenguins)

Begin by loading the tidyverse and palmerpenguins packages in the code chunk above and adding your name as the author.

Visualizing the penguins Data

Categorical Variables

Let’s start by making a bar chart of the species variable. Modify this code by filling in the ______ to do so:

ggplot(data = penguins, mapping = aes(x = species)) +
  geom_bar() +
  labs(
    x = "Penguin Species",
    y = "Number of Penguins",
    title = "Distribution of Penguin Species near Palmer Station, Antarctica"
  )

Make a bar chart showing the number of penguins on each island by using the code above as a template:

ggplot(data = penguins, mapping = aes(x = island)) +
  geom_bar() +
  labs(
    x = "Island",
    y = "Number of Penguins",
    title = "Island Distribution of Penguins near Palmer Station, Antarctica"
  )

Quantitative Variables

Now let’s make a histogram of the bill_length_mm variable. Modify this code by filling in the ______ to do so:

ggplot(data = penguins, mapping = aes(x = bill_length_mm)) +
  geom_histogram() +
  labs(
    x = "Bill Length mm",
    y = "Number of Penguins",
    title = "Bill Length Distribution"
  )

Make a histogram of flipper_length_mm and set the binwidth to 4. Use the code above as a template:

ggplot(data = penguins, mapping = aes(x = bill_length_mm)) +
  geom_histogram(binwidth = 4) + 
  labs(
    x = "Bill Length mm",
    y = "Number of Penguins",
    title = "Bill Length Distribution"
  )

Now make a density plot (instead of a histogram) of `flipper_length_mm` 
by using the `geom_density()` function:


::: {.cell}

```{.r .cell-code}
ggplot(data = penguins, mapping = aes(x = flipper_length_mm)) +
  geom_density() +
  labs(
    x = "Flipper Length mm",
    y = "Species",
    title = "Flipper Length and Species"
  )

:::

Suppose we would like to look at how flipper_length_mm differs across species. Modify this code by filling in the ______ to do so:

ggplot(data = penguins, mapping = aes(x = flipper_length_mm)) +
  geom_histogram() +
  facet_wrap( ~ species) +
  labs(
    x = "Flipper Length mm",
    y = "Number of Penguins",
    title = "Flipper Length and Species"
  )

Do different species have distinctly different flipper lengths?

Not necessarily, a lot of them are similar, but some are skewed smaller or larger.