Hi, I'm Ari Lamstein.  

I help people do great things with R.

What would you like help with?


I've written several R packages that facilitate creating choropleth maps of open datasets in R. This work is called "choroplethr". 

Click below to learn more.


Looking for in-depth courses to help you improve your technical skills?‚Äč

My highly-rated courses let you study niche topics, in depth, at your own pace.

Corporate Services

Need help migrating a team of analysts from tools such as Excel to R?  I've helped organizations like yours in the past.

Learn how I can help your team.

Derek Darves, Ph.D. Senior Data Scientist

A Gifted Teacher and Insightful Programmer

Ari is both a gifted teacher and a very insightful programmer -- attributes you don't always find strongly within the same person! He developed a clear plan to advance the R programming skills of our group and boosted our overall competency to the degree he projected in our SOI. In short, his vision matches execution, and he has the skills, insight and experience needed to succeed as a statistical consultant. Thank you Ari!

Learn to Map Census Data in R!

This free course has helped thousands of people learn to do fun and interesting analyses in R.
The course contains 5 lessons and will teach you how to make maps like this:

About Ari

You might know me as the author of choroplethr, the popular R package for mapping open datasets. My work on choroplethr has led to the creation of two full-length courses.

I am currently helping the U.S. Census Bureau to develop a new training platform. In addition to my work with Census, I also help companies to improve their analysts' proficiency with R. 

If you would like to explore working together, then please contact me.