Most Popular R Packages
Open source tools for data science and geospatial analysis
3 CRAN Packages
53+ Citations
115K+ Total Downloads
I develop and maintain open source R packages that solve real-world data science challenges. All packages are published on CRAN, the official R package repository, and are actively maintained with comprehensive documentation.
Most Popular 
Quick Install
R Console
# Install any package from CRAN
install.packages("zipcodeR")
install.packages("njgeo")
install.packages("njtr1")
# Load the package
library(zipcodeR)
library(njgeo)
library(njtr1)Package Comparison
| Feature | zipcodeR | njgeo | njtr1 |
|---|---|---|---|
| Primary Use | ZIP code analysis | NJ geocoding | Crash data |
| Geographic Scope | United States | New Jersey | New Jersey |
| Data Source | Embedded database | NJOGIS API | NJDOT files |
| Offline Support | Yes | No (API) | Downloads data |
| License | GPL-3 | MIT | MIT |
Related Articles
zipcodeR Reaches 53+ Peer-Reviewed Citations, Including MIS Quarterly
My open-source R package for ZIP code analysis has now been cited in 53+ peer-reviewed publications, including MIS Quarterly—a Financial Times Top 50 journal.
Mar 21, 2026New Jersey's official geocoding API now has a client for R
Using New Jersey's official state geocoding service just got easier! This post introduces njgeo, a new R package that simplifies working with New Jersey-specific spatial datasets.
Feb 4, 2022Announcing zipcodeR: A new R package for ZIP code analysis
Introducing zipcodeR, an R package that makes it easy to work with ZIP code-level data in spatial analysis and demographics research
Mar 15, 2021njtr1: An R Package to Download & Analyze New Jersey Car Crash Data
Introducing njtr1, an R package that automates the acquisition and cleaning of motor vehicle crash data published by the New Jersey Department of Transportation.
Jan 20, 2021What's New in zipcodeR v0.2?
A review of the new features in zipcodeR v0.2, including congressional district lookups, FIPS code searches, and community-contributed improvements.
Dec 13, 2020Frequently Asked Questions
What R packages has Gavin Rozzi created?
I have created three R packages available on CRAN: zipcodeR for ZIP code analysis, njgeo for New Jersey geocoding, and njtr1 for NJ traffic crash data. All are open source and free to use.
How do I install these R packages?
All packages can be installed from CRAN using install.packages(). For example: install.packages('zipcodeR').
Are these R packages free to use?
Yes, all R packages are open source and free to use. zipcodeR is licensed under GPL-3, while njgeo and njtr1 use the MIT license.
Which R package is most popular?
zipcodeR is the most popular with 115,000+ total downloads on CRAN and 53+ peer-reviewed citations in journals including Nature and Cancer Discovery.
About the Author
