Ari Lamstein

Ari Lamstein

Software Engineer and Data Analyst

Bio:

Choroplethr v3.6.0 is now on CRAN

Choroplethr v3.6.0 is now on CRAN

Choroplethr version 3.6.0 is now on CRAN. This version adds functionality for getting and mapping demographics of US Census Tracts. You can install it from the R console as follows: 1 2 3 install.packages(“choroplethr”) packageVersion(“choroplethr”) [1] ‘3.6.0’ To use this functionality you will need an API key from the US Census Bureau. You can learn […]

Choroplethr v3.5.3 is now on CRAN

Choroplethr v3.5.3 is now on CRAN

A new version of choroplethr is now on CRAN. You can get it by typing the following: 1 2 3 4 5 install.packages(“choroplethr”) packageVersion(“choroplethr”) [1] ‘3.3.1’ Motivation This new version was motivated by a few warnings that had started appearing since the latest update to ggplot2: 1 2 3 4 5 6 7 8 library(choroplethr) data(df_pop_state) […]

How to “Get Good at R”

How to “Get Good at R”

Editor’s note: post modified from original How can I get good at R? This has come up enough times for me to outline my thoughts on the subject. That way I can simply forward people to this post the next time the question comes up. My advice is geared towards people who want to build an […]

Visualizing Census Estimate Margins of Error in R

Visualizing Census Estimate Margins of Error in R

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 them, as well as how they tend to […]

Margin of Error by Geography in the American Community Survey (ACS)

Margin of Error by Geography in the American Community Survey (AC...

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. It’s a bit less confident about […]

How to Search for Census Data from R

How to Search for Census Data from R

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 simple demographic question and using […]

Results: R Shapefile Contest

Results: R Shapefile Contest

I am happy to announce the results from the R Shapefile Contest. The contest was an incredible success – there were 19 entries that covered a range of topics. Each entry was well thought out, and I encourage you to read each of them. Here are the entries, in order of submission: Bonus: Get all […]

R Shapefile Contest

R Shapefile Contest

Today I am happy to announce the R Shapefile Contest. The goal of the contest is to encourage and promote high quality work at the intersection of R and GIS (Geographic Information Systems). The winner of the contest will: Get featured prominently on my blog Get a free copy of my course Mapmaking in R […]