NetVisia: Heat Map & Matrix Visualization of Dynamic Social Network Statistics & Content
SocialCom 2011
MIT - Boston, MA
Robert Gove, Nick Gramsky, Rose Kirby, Emre Sefer, Cody Dunne, Awalin Sopan, Ben Shneiderman, Meirav Taieb-Maimon
Presented by: Nick Gramsky – University of Maryland
Challenges with Node/Link Diagrams
• Great Overview for Composition
• Difficult to analyze Temporally
• Identifying changes requires multiple pictures
• Relies on memory
STICK Data Set - 2004
• STICK Data Set – 2004
• Sized on degree
STICK Data Set - 2005
• STICK Data Set – 2005
• Sized on degree
• What changed?
• Whose degree increased?
• Whose degree had a bigger change?
Visualizing Network Evolution
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Visualizing Network Evolution
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What is NetVisia
• Tool for Visualizing Network Evolution
• Abandons Link-Node Diagrams for Heat Maps / Adjacency Matrices• Clustering• Alignment
• Any type of network• Social• Computer
• Visualize / Analyze / Provide Insight on:• Conventional Network Attributes• User-defined Node / Edge content
• Ex: Keywords in co-authorship dataset
NetVisia - Overview
23
4
1
STICK DataSet – Clustered View
• Nodes – Business concepts & entities
• Edges – Co-occurrence of terms
• Analysis shows:• Outliers• Bad Data
• Suggests discrete periods for investigation
Stick DataSet – Adjacency Matrix
• Deep dive• discrete time
period
• Metrics for node-node relationships
• Cluster identification
2005
Stick DataSet – Adjacency Matrix
2006 2007
2004 InfoViz Co-authorship Dataset
• Info-Viz Co-authorship • 840 distinct authors • 1995 to 2004• Nodes are authors• Edges are co-authored
papers
• Clustered & Aligned
2004 InfoViz Co-authorship Dataset
• Info-Viz Co-authorship • 840 distinct authors • 1995 to 2004• Nodes are authors• Edges are co-authored
papers
• Clustered & Aligned
• Recognition of behavior pattern
• Most co-author only one paper
2008 VAST Cell Phone Challenge
• Cell phone calls in a 10-day period / 12-hour periods
• Nodes – People• Edges – Phone Calls
• Summary shows cyclical behavior• Clustering shows shift in identities of members
Challenges / Future Work
• Challenges • Data Structures
• Future Work• Responsiveness• Additional Features
• Edge representation in overview window • Tooltips
Questions
• More information:• http://www.cs.umd.edu/hcil/netvisia/