1. Multi-Dimensional Data Visualization
cs5984: Information Visualization
Chris North

2. Data Space Multi-dimensional: databases,… 1D: timelines,… 2D: maps,…
3D: volumes,…
Hierarchies/Trees: directories,…
Networks/Graphs: web, communications,…
Document collections: digital libraries,…

3. Multi-dimensional … Fewer dimensions -> easier
1,2,3-D scatterplots …
Cleveland’s rules
We will return to some more interesting 1,2,3-D cases later
What about many dimensional data? n-D …

4. Glyphs: Chernoff Faces
10 Parameters:
Head Eccentricity
Eye Eccentricity
Pupil Size
Eyebrow Slope
Nose Size
Mouth Vertical Offset
Eye Spacing
Eye Size
Mouth Width
Mouth Openness

5. Glyphs: Stars

6. Multiple Views Scatterplot Matrix All pairs of attributes
Brushing and linking

8. Brushing and linking

9. Today
Inselberg, “Multidimensional detective” (parallel coordinates), book p107
margaret, josh s

10. Today
Kandogan, “Star Coordinates”, (web)
matt c, fanye

11. Assignment Read for Thurs: Read for next Tues: Read for next Thurs:
Rao, “Table Lens”, p343, (marty e, purvi)
Feiner, “Worlds within Worlds”, p96 (scott m, ajay)
Read for next Tues:
Tweedie&Spence, “Externalizing Abstract Mathematical Models” (Influence Explorer), p276
Keim, “VisDB”, p126
Read for next Thurs:
Fishkin, “Movable filters” (Magic Lens), p253
Doan, “Query Previews”, web page
Send me your picture
Id #

12. Homework #1: Thurs Feb 1
Get some data (>=1000 items, >=6 attributes)
Visualize it (>=2 tools)
Spotfire, Advizor, Table Lens, Parallel Coordinates, mmvz
Written report (2-3 pages)
data:
Usability – Rex hartson
eye-tracking - Debby hix
Biotech – lenny Heath, naren R
NASA - Layne watson
dept - Cliff Shaffer
univ - Dennis kafura
software eng - Steve Edwards
survey data - Jan lee