Revolutions Milestones in AI, Machine Learning, Data Science, and visualization with R and Python since 2008 UPDATE September 20: Joyplots are now known as Ridgeline Plots, and available in the ggridges package. Read the explanation here. This is a joyplot: a series of histograms, density plots or time series for a number of data segments, all aligned to the same horizontal scale and presented wit