An easy-to-use guide to dozens of useful ggplot2 R data visualization commands in a handy, searchable table. There’s a reason ggplot2 is one of the most popular add-on packages for R: It’s a powerful, flexible and well-thought-out platform to create data visualizations you can customize to your heart’s content. But it also can be a bit overwhelming. While I find the logic of plot layers to be intu