Hello, Penguins!

Author

Affiliation

Mine

Duke University

Introduction

Slide 1

Meet the Palmer Penguins!

Caption goes here

Table caption goes here

Col1	Col2	Col3
1		4
2	5
3

Packages

For this analysis we’ll use a few packages for visualization and data display.

```{python}
#| label: import-packages
import great_tables as gt
import plotnine as p9
```

Data

The dataset we’ll use comes from the palmerpenguins package.

```{python}
#| label: import-load-data
from palmerpenguins import load_penguins

penguins = load_penguins()
```

This dataset contains size measurements, clutch observations, and blood isotope ratios for 344 adult foraging Adélie, Chinstrap, and Gentoo penguins observed on islands in the Palmer Archipelago near Palmer Station, Antarctica.

Let’s take a peek at the data. Table 1 shows the first five rows of the penguins data frame.

```{python}
#| label: tbl-penguins-head
#| tbl-cap: First five rows of the penguins data frame.
(
    gt.GT(penguins.head())
    .fmt_number(columns = "body_mass_g", use_seps = True, decimals = 0)
)
```

Table 1: First five rows of the penguins data frame.

species	island	bill_length_mm	bill_depth_mm	flipper_length_mm	body_mass_g	sex	year
Adelie	Torgersen	39.1	18.7	181.0	3,750	male	2007
Adelie	Torgersen	39.5	17.4	186.0	3,800	female	2007
Adelie	Torgersen	40.3	18.0	195.0	3,250	female	2007
Adelie	Torgersen						2007
Adelie	Torgersen	36.7	19.3	193.0	3,450	female	2007

Exploratory analysis

Body mass vs. flipper length

Figure 1 shows the relationship between body mass and flipper length of penguins.

```{python}
#| label: fig-penguins-plotnine
#| fig-cap: Body mass vs. flipper length of penguins
#| fig-alt: 'Scatterplot of body mass vs. flipper length of three species of penguins (Adelie, Gentoo, and Chinstrap) with overlaid linear models for each species. There is a positive relationship between the two variables for each species. Slopes for Adelie and Chinstrap penguins are similar, and the slope for Gentoo penguins is slightly higher. Sizes of Adelie and Chinstrap penguins are also similar, while Gentoo penguins are larger in terms of body mass and flipper length compared to penguins from the other species.'
#| warning: false
(
    p9.ggplot(
        penguins, 
        p9.aes(x = "flipper_length_mm", y = "body_mass_g", color = "species")
    )
    + p9.geom_point()
    + p9.stat_smooth(method = "lm")
    + p9.scale_color_manual(
        values = {
            "Adelie": "#FF8C00", 
            "Gentoo": "#159090", 
            "Chinstrap": "#A034F0"
        }
    ) 
    + p9.theme_minimal()
    + p9.labs(
        x = "Flipper length", 
        y = "Body mass", 
        color = "Species", 
        title = "Body mass vs. flipper length of Palmer Penguins"
    )
)
```

Figure 1: Body mass vs. flipper length of penguins