Category Archives for Blog

Free R Help: October Edition

Last Month I offered 10 slots of Free R Help and the response was overwhelming. About 100 people requested slots, which was much more than I expected. Many of the people who I helped had taken online R courses such as the Coursera Data Science Specialization, but were struggling with applying what they learned to their own […]

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Combining Choropleth Maps and Reference Maps in R

Recent updates to my mapping packages now make it easy to combine choropleth maps and reference maps in R. All you have to do is pass the parameter reference_map = TRUE to the existing functions. This should “just work”, regardless of which region you zoom in on or what data you display. The following table shows the affected functions and their […]

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User Question: How to Add a State Border to a Zip Code Map?

A user recently asked me how to add a state outline to a Zip Code map. Consider this map, which shows the percent white of each Zip Code Tabulated Area (ZCTA) in New York and New Jersey: Clearly the ZCTAs in northern New York have the highest concentration of white residents. However, it would still […]

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New Lesson: Mapping Historic Census Data in R

Today I am happy to announce a new lesson for my free email course Learn to Map Census Data in R. This lesson explains how to get and map historic census data in R. While I had intended this lesson to only go to new signups, it looks like my email provider sent it (along […]

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Free R Help

Today I am giving away 10 sessions of free, online, one-on-one R help. My hope is to get a better understanding of how my readers use R, and the issues they face when working on their own projects. The sessions will be over the next two weeks, online and 30-60 minutes each. I just purchased Screenhero, […]

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