Yesterday I announced two webinars that I will be running to celebrate the launch of my new course, Shapefiles for R Programmers. Today I’m announcing two bonuses that I’m giving to people who buy the course by Thursday at 5pm PT: A 15% discount (save $15)! An invitation to a ...

This weekend I finished production of my new course, Shapefiles for R Programmers. To celebrate the launch, tomorrow I will be announcing a special limited-time discount. Today, however, I want to announce two live webinars that I will be doing about the course: Wednesday at 1pm PT Thursday at 10am ...

On May 17 I will be running a free workshop titled Mapping Open Data in R. The workshop will be in Berkeley, CA and is open to the public. If you have an interest in the subject matter then I hope that you will attend! Here is a sample of the ...

On March 28th I announced the R Election Analysis Contest. The quantity and quality of submissions was amazing!  If you have not been following along, here is a complete list of submissions, with links, in order of submission. I encourage you to read them all! A Behind the Scenes Look… ...

Today my new course, Shapefiles for R Programmers, is available for preorder! This course is designed to open up new doors of data analysis for R programmers by teaching them how to work with shapefiles, using both GIS programs and R. Shapefiles are the most common method of storing maps, ...

Today I am happy to announce that a new version of choroplethr is now on CRAN. To get it type the following: The new version is 3.5.2. This version fixes two fairly pernicious bugs that were introduced in the last update to choroplethr. For reference, he is a detailed description of ...

Today I will demonstrate how the margin of error in American Community Survey (ACS) estimates grow as the size of the geography decreases.  The final chart that we’ll create is this: The way I interpret the above chart is this: The ACS is very confident about its state-level estimates. ...

After releasing my course Mapmaking in R with Choroplethr last December I received an interesting email from Dr. Herb Wilson, a biologist at Colby College. Herb studies the Red-breasted Nuthatch, which live throughout the United States and Canada. He asked if it was possible to use choroplethr to map the ...

A key feature of American Community Survey (ACS) data is that the reported values contain both estimates and margins of error. The margins of error, unfortunately, are often overlooked. After meeting with Ezra Glenn last year I gained a new appreciation of them. Today I’ll demonstrate how to visualize ...

A new version of choroplethr (v3.4.0) is now on CRAN. It allows you to combine Administrative Level 1 choropleths with reference maps. For reference, this functionality has been present for US maps for a while now (1, 2). This update just extends that functionality to the Administrative Level 1 mapping function, admin1_choropleth. To ...

A new version of ChoroplethrAdmin1 is now on CRAN, and it dramatically speeds up making Administrative Level 1 maps in choroplethr. “Administrative Level 1” is just a generic term for “1st subnational division”. In the US this is called a State, in Canada it’s called a Province, and so on. Overall, ...

In my course Learn to Map Census Data in R I provide people with a handful of interesting demographics to analyze. This is convenient for teaching, but people often want to search for other demographic statistics. To address that, today I will work through an example of starting with a ...