A Ridgelineplot (formerly called Joyplot) allows to study the distribution of a numerical variable for several groups. In this example, we check the distribution of the price of diamonds following their quality.


This graph is made using the ggridges library, which is a ggplot2 extension and thus respect the syntax of the grammar of graphic. We specify the ‘price’ column for the X axis and the ‘cut’ column for the Y axis. Adding fill=cut allows to use one colour per category and display them as separate groups.


Check the Ridgeline section to learn how to custom this kind of graphic.










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