Hi, I'm Ari Lamstein.  

I help people do great things with R.

What would you like help with?

Corporate R Training

Want to help your data analysts become skilled R programmers?

Click below to learn more about my corporate training offerings.


I am the author of choroplethr, a suite of open source R packages for mapping demographic statistics.

Click below to learn more about my open source work.

Learn to Map Census Data in R!

This free course has helped thousands of people learn to map demographic data in R.
The course contains 5 lessons and will teach you how to make this map:

About Ari

I am a trainer and consultant who specializes in R. I have helped companies and government agencies train their workforces and complete custom projects.

Prior to creating my own business I worked as a software engineer and data analyst at several tech companies in San Francisco.  I discovered R while working on a project to analyze real estate data. I couldn't find a package that did exactly what I needed, so I created it myself. That package is called choroplethr, and is now one of the most popular R packages for mapping open datasets. 

Please contact me if you are interested in working together.