Hi, I'm Ari Lamstein.  

I help people do great things with R.

What would you like help with?

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.


Struggling to teach yourself R? Spending more time frustrated with error messages than analyzing results?

Learn how I can help you improve your skills.  


Looking for in-depth courses at the intersection of R, Maps and Open Data?

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

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. I've spoken about choroplethr at conferences around the world.

Through my company, Lamstein Consulting LLC, I provide training and consulting services to people using R. 

Before creating Lamstein Consulting I worked as a software engineer and data analyst at various companies in San Francisco.

Have a question about learning R? Want to discuss a custom project? Contact me.