plot us map in r
Graphing lat/long data points on US map 50 states including Alaska How to plot state by state data on a map of the U.S. in R Storybench.
How to draw good looking maps in R | Data visualization US State Maps using map_data() | R bloggers.
Plot a numerical values in United states map based on Abbreviated Choropleth Maps in R | Examples | Plotly.
Making Maps With R · Reproducible Research. An Easy Way to Map Data in R with Plotly – Brian Sarnacki.