Faceting Choropleth Maps with ggplot2 (02_08)
This lesson is called Faceting Choropleth Maps with ggplot2 (02_08), part of the Mapping with R course. This lesson is called Faceting Choropleth Maps with ggplot2 (02_08), part of the Mapping with R course.
Transcript
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Your Turn
Open project 02_08.
Recreate this facetted choropleth from the your-turn.R script.
Create a vector containing the correct order of educational attainments
Use
fct_relevel()to reorder the facet labels.
Learn More
As mentioned in the video, small multiples is a data visualization technique that {ggplot2} makes really easy with the facet_wrap() and facet_grid() functions. The facet_grid() function allows you to facet by two categorical variables, eg
library(tidyverse)
library(palmerpenguins)
penguins %>%
ggplot(aes(x = bill_length_mm,
y = bill_depth_mm)) +
geom_point() +
facet_grid(species ~ island) +
theme_gray(base_size = 16)It's also possible to do this two-level faceting for your choropleth!
The solution I've given for the your turn example isn't completely perfect because the facet labels are slightly cut-off - take a look at the bottom of the g's! To fix this you need to know that the facet labels are called "strip" in the {ggplot2} theme and you can tidy up these labels as follows:
gg_faceted_choropleth +
theme_void() +
theme(strip.text.x = element_text(margin = margin(b = 1, t = 0)))Have any questions? Put them below and we will help you out!
Course Content
34 Lessons
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