AE 05: Waffle charts for visualizing proportions

library(tidyverse)
library(palmerpenguins)
library(waffle)
library(viridis)

# fix seed value for reproducibility
set.seed(123)

theme_set(theme_void())

Waffle charts

{waffle} provides a {ggplot2} implementation of waffle plots. The typical workflow consists of preparing the data by tabulating in advance and then plotting it with {ggplot2} and geom_waffle().

Basic waffle chart

Demonstration: Prepare the penguins data frame to visualize the number of penguins by species.

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Demonstration: Use the prepared data to draw a basic color-coded waffle chart

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Improve the waffle chart

Your turn: Adjust the waffle chart to use a fixed aspect ratio so the symbols are squares. Rotate the chart so the squares are stacked vertically.

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Demonstration: {waffle} will draw all observations on the chart. For larger datasets, this is problematic. Instead, we might want to visualize the proportion of observations in each category. Use geom_waffle() to represent the data as proportions instead.

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Your turn: Adjust the waffle chart to use a better color palette and move the legend to the top.

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