Today, I was able to use rMaps to make two dynamic choropleth maps. The first map below is designed to draw attention to the states from which no Reed students matriculated each year from 2007-2013. Initially, the map shows the 2007 data and completely shades in any state that did not have a matriculating Reed College student in 2007. Pressing the play button in the upper left-hand corner will run the map and will display the data for subsequent years.
The second map represents the number of matriculants from each state with a color gradient that is displayed in a legend below the map. To replay either of the maps you will need to refresh your browser.
These maps are works in progress and are far from perfect. This post is intended to demonstrate the functionality of the rMaps package and how it enables users to create dynamic choropleth maps quickly (I downloaded the package at 10 am this morning). There are a few bugs in the above maps (like the text “2014” showing up at the end of the animation in the first map despite not being represented in the data). Bugs in my code withstanding, I think this proof-of-concept is a powerful demonstration of the rapidly expanding capabilities of R.