Area chart with R
An area chart, like a line chart, displays the evolution of numeric variables over a continuous period of time. However, in an area chart, the area between the line and x-axis is filled with colour or texture.
More about: Area chart
Area chart
# Loading required packages
library(unhcrthemes)
library(tidyverse)
library(scales)
# Loading data
df <- read_csv("https://raw.githubusercontent.com/GDS-ODSSS/unhcr-dataviz-platform/master/data/change_over_time/area.csv")
# Plot
ggplot(
filter(
df,
population_type == "Refugees"
),
aes(
x = year,
y = population_number
)
) +
geom_area(
fill = unhcr_pal(n = 1, "pal_blue"),
alpha = 0.3
) +
geom_line(
size = 1,
color = unhcr_pal(n = 1, "pal_blue")
) +
labs(
title = "Number of refugees | 1991-2021",
y = "Number of people",
caption = "Source: UNHCR Refugee Data Finder\n© UNHCR, The UN Refugee Agency"
) +
scale_x_continuous(breaks = pretty_breaks()) +
scale_y_continuous(
expand = expansion(c(0, 0.1)),
breaks = pretty_breaks(n = 4),
labels = label_number_si()
) +
theme_unhcr(
grid = "Y",
axis = "x",
axis_title = "y"
)
