cs5984: Information Visualization Chris North Document Collections 2 cs5984: Information Visualization Chris North

Visualization Strategies Cluster Maps Keyword Query Relationships Reduced representation User controlled layout

Cluster Maps Kohonen Themescapes

Galaxy of News Cluster map with full text Zooming

Keyword Query Tilebars

VIBE Korfhage, http://www.pitt.edu/~korfhage/interfaces.html Documents located between query keywords using spring model

VR-VIBE

Keyword Query Good: Bad: Reduces the browsing space Map according to user’s interests Bad: What keywords do I use? What about other related documents that don’t use these keywords? No initial overview Mega-hit, zero-hit problem

Relationships Show inter-relationships Matrix or Complete Graph Salton Similarity measure between all pairs of docs Threshold level Salton

Variations Docs + Paragraphs Themes

Citation Networks Butterfly Browser Mackinlay,… (PARC) Butterfly: Left = refs Right = citers Yellow = #citers Blue = visited 3d plot: date, Name, # citers

Relationships Better for smaller, more detailed map Scale up: Network visualization Good: Can see more complex relationships between/within documents Can act like hyperlinks! Bad: Finding specific documents Scale up difficult

Reduced Representation Bederson, “Image browsing” Rui, Anusha

User controlled layout Card, “WebBook and Web Forager” Mrinmayee, Ming http://vtopus.cs.vt.edu/~north/infoviz/webbook.mpa

Next Week Tues: 3-D data Thurs: Workspaces Thanksgiving break Kniss, “Interactive Volume Rendering with Direct Manip” xueqi, mahesh Thurs: Workspaces Robertson, “Task Gallery” supriya, varun Upson, “AVS” christa, jun Thanksgiving break Tues 27: Debates Kobsa, “Empirical comparison of comm infovis systems” kunal, zhiping

Upcoming Sched Tues: 3-D data Thurs: Workspaces Thanksgiving break Tues 27: Debates, 2D vs 3D Thurs 29: How (not) to lie with visualization Dec: project presentations Dec 7: CHI 2-pagers due, student posters due