Katherine Ognyanova on Life, the Universe, and Networked Media   RSS Feed
Network Viz Ko1

Static and dynamic network visualization with R

[June 2016 update] This tutorial has been updated and extended. The new version includes additional information (more on interactive JS networks, geographic data, etc). If you want to see the old version, it is still available here. You can also get the new tutorial PDF and code here or on GithHub. Please be patient: the frame below contains a lot …

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Network Data

Network datasets

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 reply here. The datasets included in my tutorials are …

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Gephi R Sunbelt2016

Sunbelt network visualization: R and Gephi tutorials

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 Network visualization with R: workshop handout (PDF) Network visualization …

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Network Viz

Upcoming network visualization workshops at Sunbelt and POLNET

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 will once again include visualizations featuring baskets full of …

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Igraph

Network analysis with R and igraph: NetSci X Tutorial

Get the tutorial PDF and code, or download on GithHub.

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Map Terms Rep Dem 05 Norm 2 Notxt

The world as seen in political statements

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 below contain the frequency of country name occurrence and …

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Coal Congress4

Term co-occurrence in party documents: Network data from our Politico post

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 documents. The political statements these data were extracted from …

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PolitwoopsR Package

Deleted congressional tweets: the R code

[Update 15/04/02] If you were brought here by a Dean Richards Twitter bot, read this. A few days ago I published a post containing interactive visualizations with the deleted tweets of US politicians. Those tweets were collected by the Politwoops project, maintained in the US by the Sunlight Foundation. I promised people to post the R code that grabs the …

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Politwoops Deleted Tweets Featured

The Congress Tweets You Never Did See

[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 with data from Politwoops: an international project that tracks politicians on Twitter and stores their deleted tweets for …

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Image Networks Gephi R Feat

Facebook data collection and photo network visualization with Gephi and R

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 GitHub Gist kindly pointed out a couple of sneaky typos – those are now fixed. Gephi is one of my favorite network visualization tools – it offers a wide variety of customizable layouts, allows for sophisticated …

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NULab Gephi Workshop

Gephi Workshop at Northeastern’s NULab

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 to basic and advanced network visualization techniques using the …

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BostonDataSwap 900x350

Boston Data Day 2013 Skill-A-Thon

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 the network visualization software Gephi here. You will also …

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Media Topics: A Dynamic Network Visualization

Topics in Mainstream Media:
A Dynamic Network Visualization

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. The key factors I look into include popularity, ownership, …

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Intro to Network Software: UCINET, NodeXL, Gephi, R, Statnet, ERGM, Siena

Intro materials: network analysis software (UCINET, NodeXL, Gephi, Statnet, ERGM, RSiena)

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 network tools – from the classic UCINET program through …

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NCA 2012 Political Efficacy Feat

Political Efficacy on the Internet: A Media System Dependency Approach

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 is also linked to the ability of online tools …

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FCC Critical Information Needs of the American Public

Our FCC Briefing: Critical Information Needs of the American Public

In the last few months, I’ve been working with a great team of scholars putting together a study commissioned by the FCC. The project provides a critical review of existing research on the information needs of communities in the US. Major points include defining individual and community critical needs, examining the extent to which they are served by local media …

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