For the last decade or so, I have received my regular dose of new academic content from journal RSS feeds. In recent years, social media*, listservs, and thoughtful friend e-mails have helped me discover many great articles. Also recently (much to my dismay!) some publishers** have decided to discontinue their RSS. [...]
This is a comprehensive tutorial on network visualization with R. It covers data input and formats, visualization basics, parameters and layouts for one-mode and bipartite graphs; dealing with multiplex links, interactive and animated visualization for longitudinal networks; and visualizing networks on geographic maps. To follow the tutorial, download the code and [...]
Since I started posting network tutorials on this site, people will occasionally write to ask me about the included example datasets. I also get e-mails from people asking where they might find network data to use for a project or in teaching. Seems like a good idea to post a quick [...]
More details to follow, but for now: workshop materials from Sunbelt 2016. Basic and Advanced Network Visualization with Gephi Sunbelt 2016 workshop materials Network visualization with Gephi: workshop handout (PDF) Network visualization with Gephi: example data files (ZIP) Basic and Advanced Network Visualization with R Sunbelt 2016 workshop materials [...]
In the next few months, I will be running several network visualization workshops using R and Gephi at Sunbelt 2016 (Newport Beach, CA) and Political Networks (St. Louis, MO). The descriptions follow below - if you are going to one of the conferences, do stop by! By popular demand, the workshops [...]
Get the tutorial PDF and code, or download on GithHub. A more recent tutorial covering network basics with R and igraph is available here. If you find the materials useful, please cite them in your work – this helps me make the case that open publishing of digital materials like this [...]
A new Politico post produced by our lab examines the mentions of countries around the globe in congressional documents. We look at the frequency of country mentions and co-occurrence. These numbers were extracted from political statements provided by VoteSmart. Here we post the data we used for those visualizations. The files [...]
David Lazer, Oren Tsur, and I recently took a look at the use of the term "coal" in documents produced by members of the US Congress. Some numbers and visualizations based on this were published by Politico. Here, we post the data behind the network map of term co-occurrence in coal-related [...]
If you are interested in analyzing the deleted tweets of politicians, my new R package PolitwoopsR is available on GitHub. Also see this R script examining deleted tweets. [Update 15/04/02] If you were brought here by a Dean Richards Twitter bot, read this. A few days ago I published [...]
Politicians Descriptive Party States URLs Terms/Tags Sentiment Term net [UPDATE 15/03/30] Check out this follow-up post to get the R code used to extract and clean the Politwoops & Twitter data. A package that automates the data collection is now available on GitHub: PolitwoopsR. For some months now, I've been playing [...]
Facebook Network: Gephi Facebook Network: igraph Facebook Network: qgraph [Update April 26 2o14] Esteban Moro reminded me that there's no need to manually rescale igraph layouts now - one can use layout.norm() instead (script updated accordingly). Hugle [...]
On March 25, the NULab for Texts, Maps, and Networks is holding a Gephi workshop on static/dynamic network visualization that I'm leading. Details and materials for the workshop follow below. Time: Tue, March 25, 2014 - 12:00-1:30pm Location: Northeastern University, Dana Building floor 5, CCNR Description: This workshop provides an introduction [...]
The Data Swap 2013 skill-a-thon organized by The Boston Globe, NULab for Texts, Maps, and Networks, and The Boston Area Research Initiative is taking place on October 17-18. The materials for the quick network tutorial I'm doing there are posted below. DataSwap 2013 network presentation (Download PDF). Visualizing network dynamics: Download [...]
My doctoral dissertation (defended a few months back) studies a dynamic network of news outlets and the topics they cover over time. It implements a measure of media fragmentation and uses actor-based modeling to evaluate the impact of economic, political, organizational, and structural forces on certain properties of the media agenda. [...]
In the fall of 2012, I got to design & lead the weekly labs for a network seminar at USC. I also worked on the methods portion of the syllabus for the class. COMM 645: Communication Networks is a PhD-level course taught by Peter Monge. The labs cover a range of [...]
Just presented at the NCA 2012 Convention, Orlando FL, Top Papers in Political Communication panel. This study takes an MSD approach to look at the impact of the Internet on political efficacy. The results show that online political efficacy is associated with the perceived comprehensiveness and credibility of online news. Efficacy [...]