Dataviz examples in R

Data visualization examples, using the R programming language and ggplot2 library, mostly.

The dataset used to draw the figures is about CO2 emissions of driving cars sold in France, and is publicly available here.

The figures are located in the figures folder, and the corresponding code in the figures.R file.

Example:

With the corresponding code:

fig12 <- df %>%
  filter(Marque %in% c("AUDI", "BMW", "MERCEDES", "VOLKSWAGEN")) %>%
  group_by(Année, Marque) %>%
  summarise(n=n()) %>%
  ggplot(aes(x=Année,
             y=n,
             fill=Marque)) +
    geom_stream() +
    barplot_theme +
    scale_fill_ipsum() +
    labs(title="Evolution of the number of cars by German manufacturers",
         subtitle="Mercedes growth happened in the early 2000s, VW later after 2010",
         x="Year",
         y="Number of cars",
         fill="Manufacturer")