In this tutorial, we will learn how to add vertical or horizontal lines to "small multiples" i.e. multiple subplots of similar kind using Seaborn's refline() function (h/t to Chris Moffitt of @pbpython). Vertical/Horizontal lines are often useful to show where the mean or median … [Read more...] about How to Add Vertical/Horizontal Lines to Subplots with Seaborn