Re-creating a Voronoi-Style Map with R

Introduction I’ve written some “tutorial”-like content recently—see here, here, and here—but I’ve been lacking on ideas for “original” content since then. With that said, I thought it would to try to re-create something with R. (Not too long ago I saw that Andrew Heiss did something akin to this with Charles Minard’s well-known visualization of Napoleon’s 1812.) The focus of my re-creation here is the price contour map shown on the front page of the website for the Electric Reliability Council of Texas, the independent system operator of electric power flow for about 90 percent of Texas residents, as well as the employer of yours truly).