[This article was first published on Diego Valle's Blog, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
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One of the problems with choropleths is that, as explained by Hadley Wickham in this presentation, big states tend to draw more attention because of their size, but they also tend to have a low population Density. For example, Mexico City, the capital of Mexico and it’s industrial and economic center, with over 8 million people is barely visible in the map. One solution is to draw a circle in the center of each state.Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
The code for the chart is available from Github
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