Hello, Penguins

Introduction

Data

for this analysis we’ll use the penguins dataset from the palmerpenguins package.(Gorman et al. 2014)

library(tidyverse)
library(ggthemes)
library(palmerpenguins)
library(gt)
glimpse(penguins)
Rows: 344
Columns: 8
$ species           <fct> Adelie, Adelie, Adelie, Adelie, Adelie, Adelie, Adel…
$ island            <fct> Torgersen, Torgersen, Torgersen, Torgersen, Torgerse…
$ bill_length_mm    <dbl> 39.1, 39.5, 40.3, NA, 36.7, 39.3, 38.9, 39.2, 34.1, …
$ bill_depth_mm     <dbl> 18.7, 17.4, 18.0, NA, 19.3, 20.6, 17.8, 19.6, 18.1, …
$ flipper_length_mm <int> 181, 186, 195, NA, 193, 190, 181, 195, 193, 190, 186…
$ body_mass_g       <int> 3750, 3800, 3250, NA, 3450, 3650, 3625, 4675, 3475, …
$ sex               <fct> male, female, female, NA, female, male, female, male…
$ year              <int> 2007, 2007, 2007, 2007, 2007, 2007, 2007, 2007, 2007…

Species

Figure 1 below is a scatter plot of species of penguins.

ggplot( 
  penguins, 
  aes( 
    x = bill_length_mm, y = bill_depth_mm, 
    color = species, shape = species 
      
      )
) + 
  geom_point() + 
  theme_minimal() + 
  scale_color_colorblind()
Warning: Removed 2 rows containing missing values or values outside the scale range
(`geom_point()`).
  labs(x = "Bill length (mm)", y = "Bill depth (mm)")
<ggplot2::labels> List of 2
 $ x: chr "Bill length (mm)"
 $ y: chr "Bill depth (mm)"
A scatterplot of penguins' bil depth and length, colored by species of penguins. There is a relatively strong, linear association.
Figure 1: A scatterplot of penguins’ bil depth and length, colored by species of penguins.

Penguins

Table 1 shows the first 10 penguins from the dataset.

penguins |> 
  slice_head(n=10) |> 
  select(species, island, bill_length_mm, bill_depth_mm) |>
  gt()
Table 1: First 10 penguins.
species island bill_length_mm bill_depth_mm
Adelie Torgersen 39.1 18.7
Adelie Torgersen 39.5 17.4
Adelie Torgersen 40.3 18.0
Adelie Torgersen NA NA
Adelie Torgersen 36.7 19.3
Adelie Torgersen 39.3 20.6
Adelie Torgersen 38.9 17.8
Adelie Torgersen 39.2 19.6
Adelie Torgersen 34.1 18.1
Adelie Torgersen 42.0 20.2

Analysis

Modeling results

References

Gorman, Kristen B., Tony D. Williams, and William R. Fraser. 2014. “Ecological Sexual Dimorphism and Environmental Variability Within a Community of Antarctic Penguins (Genus Pygoscelis).” PLoS ONE 9 (3): e90081. https://doi.org/10.1371/journal.pone.0090081.