Flint sentinel tests -- animated!

Motivation Flint maps (from winter 2016) Sentinel tests Animations Motivation The tweenr R package looks really cool! I want 1) to try it, 2) to revisit some old interests that never made it to the blog, and 3) to keep one foot in the water sector, despite some uncertainty as to its part in my professional future. Early in 2016 I was playing around with Flint, Michigan lead data and wanted to see what trends I could pick out spatially.