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2009 December NodeXL Overview
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2009 December NodeXL Overview

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An overview of the Network Overview Discovery and Exploration add-in for Excel 2007 (NodeXL), a social network analysis add-in for the familiar spreadsheet application. Visualize twitter, flickr, ...

An overview of the Network Overview Discovery and Exploration add-in for Excel 2007 (NodeXL), a social network analysis add-in for the familiar spreadsheet application. Visualize twitter, flickr, facebook, and email networks with just a few mouse clicks.

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  • “You can make a mess.”
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2009 December NodeXL Overview 2009 December NodeXL Overview Presentation Transcript

  • Network Overview, Discovery and Exploration for Excel 2007
    Social Media Network Analysis with NodeXL
    Marc A. Smith
    Chief Social Scientist
    Connected Action Consulting Group
    Marc@ConnectedAction.net
    http://www.ConnectedAction.net
    http://www.codeplex.com/nodexl
    http://www.twitter.com/marc_smith
    http://delicious.com/marc_smith/Paper
    http://www.flickr.com/photos/marc_smith
    http://www.facebook.com/marc.smith.sociologist
    http://www.linkedin.com/in/marcasmith
    http://www.slideshare.net/Marc_A_Smith
  • Dr. Marc A. Smith
    Ph.D. in Sociology, UCLA, 2002
    Chief Social Scientist, Connected Action Consulting Group,Silicon Valley, CA
    http://www.connectedaction.net
    marc@connectedaction.net
    Research on the social network structure of social media, online community, collaboration.
    Currently working on:
    NodeXL: Social Network Analysishttp://www.codeplex.com/nodexl
    Mapping link structure of social media
    Reporting tools for community and brands
    Discovering social roles in social media, building an ecological model of computer-mediated collective action
  • Problem: No network chart in Excel
  • Problem: No network chart in Excel
  • NodeXL: Network analysis and visualization tool
    • Cyclic Graph data structures have limited support in existing Office tools
    • Network analysis is of growing importance in academic, commercial, and Internet social media contexts
    • Existing network analysis tools have command line interfaces or demand steep learning curves
    • Many network data sets already live in Excel!
  • NodeXL: Goal: Make SNA easier
    Existing Social Network Tools are challenging for many novice users
    Tools like Excel are widely used
    Leveraging a spreadsheet as a host for SNA lowers barriers to network data analysis and display
  • Social Network Analysis ToolkitTools to support the study of the social network structure of
    social media and other directed graph structures
    Sociologist
    “What are the structures of communication in scientific discussions?”
    User Experience Information Visualization
    “What are the best UI/UX workflows for network analysis tools?”
    Computer Scientist Algorithmicist for Social Network Measures
    “What are the measures and algorithms needed for understanding networks?”
  • 10
  • The Ties that Blind?
    11
  • Reply-To Network
    Network at distance 2 for the most prolific author of the microsoft.public.internetexplorer.general newsgroup
    The Ties that Blind?
  • Darwin Bell
    13
  • The Ties that Blind?
    Pajek without modification can sometimes reveal structures of great interest.
  • Mapping Newsgroup Social Ties
    Microsoft.public.windowsxp.server.general
    Two “answer people” with an emerging 3rd.
    15
  • 16
    • Answer person
    • Outward ties to local isolates
    • Relative absence of triangles
    • Few intense ties
    • Reply Magnet
    • Ties from local isolates often inward only
    • Sparse, few triangles
    • Few intense ties
    Distinguishing attributes:
    17
  • Distinguishing attributes:
    • Answer person
    • Outward ties to local isolates
    • Relative absence of triangles
    • Few intense ties
    • Discussion person
    • Ties from local isolates often inward only
    • Dense, many triangles
    • Numerous intense ties
    18
  • Clear and consistent signaturesof an “Answer Person”
    Light touch to numerous threads initiated by someone else
    Most ties are outward to local isolates
    Many more ties to small fish than big fish
    19
  • Roles Project
    Using Netscan data to derive social roles in Usenet
    Next steps: quantify & explore in more depth
    Answer Person, microsoft.public.windows.server.general
    Discussion, rec.kites
    Flame, alt.flame
    Social Support, alt.support.divorce
    PUBLISHED in HICSS, JCMC, JoSS, IEEE Internet Communications (special issue on Social Networks)
    20
  • Relationships among #OCS09 mentioning Twitter users
  • Relationships among “NodeXL” Mentioning Twitter users
  • NodeXL Imports User and Keyword Networks from Twitter
  • Dr. Robert Ackland
    • Works at the intersection of empirical social science and computer science, developing new approaches and related tools (involving information retrieval, data visualisation and social network analysis) for studying online social and organisational networks
    • Established Virtual Observatory for the Study of Online Networks (VOSON) project in 2005 - http://voson.anu.edu.au
    • Teaches two masters courses: Social Science of the Internet” and Online Research Methods”
    • Fellow and Masters Coordinator in Australian Demographic and Social Research Institute, at the Australian National University
    • Degrees in economics from Univ. of Melbourne, Yale Univ. (as Fulbright Scholar) and ANU, where he completed his PhD
  • Growing NodeXL user community: nearing 18,000 downloads
  • Network of relationships among “Honda” mentioning Twitter users
  • Network of relationships among “Opendata” mentioning Twitter users
  • Network of relationships among “SharePoint” mentioning Twitter users
  • NodeXL Calculates a number of Network Metrics and “subgraphs”
  • Sub graph images of each “ego-network”
  • Network of relationships among “Intuit” mentioning Twitter users
  • NodeXL supports a number of graph layouts
    Fruchterman-Reingold
    Harel-Koren
  • Harel-Koren layout of Marc Smith FacebookEgonetwork
  • Fruchterman-Reingold layout of Marc Smith FacebookEgonetwork
  • FR layout of the relationships among #WIN09 Mentioning Twitter users
  • US Senate votingrelationships
  • Changed party in 2009
    US Senate votingrelationships
  • Systematic Yet Flexible Network Analysis Tasks
    Overall network metrics (e.g. number of nodes, number of edges, density, diameter)
    Node rankings (e.g. degree, betweenness, closeness centrality)
    Edge rankings (e.g. weight, betweenness centrality)
    Node rankings in pairs (e.g. degree vs. betweenness, plotted on a scatter gram)
    Edge rankings in pairs
    Cohesive subgroups (e.g. finding communities in networks)
    Multiplexity (e.g. analyzing comparisons between different edge types, such as friends vs. enemies)
    Shneiderman, Perer, Dunne
  • Whole Graph /
    All Time
    Sub Graph /
    All Time
    Filtering Network Diagrams
    Micro ---- Time ---- Macro
    Sub Graph /
    Narrow Time Slice
    Micro ---- Scale ---- Macro
    Whole Graph /
    Narrow Time Slice
  • NodeXL Next Steps
    • Enhanced layouts
    • Better manual layout of nodes
    • Clustering and composite nodes
    • Add/remove a node to/from a cluster
    • Add/remove a node to/from a composite
    • Web interface (HTML5/Azure)
    • Add social network data sources:
    • Exchange, Sharepoint, Active Directory, ACM Digital Library, , etc.
  • Network Overview, Discovery and Exploration for Excel 2007
    Social Media Network Analysis with NodeXL
    Marc A. Smith
    Chief Social Scientist
    Connected Action Consulting Group
    Marc@ConnectedAction.net
    http://www.ConnectedAction.net
    http://www.codeplex.com/nodexl
    http://www.twitter.com/marc_smith
    http://delicious.com/marc_smith/Paper
    http://www.flickr.com/photos/marc_smith
    http://www.facebook.com/marc.smith.sociologist
    http://www.linkedin.com/in/marcasmith
    http://www.slideshare.net/Marc_A_Smith