Trees%203

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Trees 3

• cs5984 Information Visualization
• Chris North

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Nifty App of the Day

• SAS JMP

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Review

• Connection (node link)
• Hyperbolic, Conetree,
• Containment (node in node)
• Treemap, Sunburst,
• Scale lt1000

A
C
B
A
B
C
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Today

• Beaudoin, Cheops, web
• Satya, Sumithra

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The Original Fisheye View

• George Furnas, 1981 (pg 311)
• Large information space
• User controlled focus point
• How to render items?
• Normal View just pick items nearby
• Fisheye View pick items based on degree of
  interest
• Degree of Interest function of distance from f
  and a priori importance
• DOI(x) -dist(x,f) imp(x)

f
x
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Example Tree structure

• Distance links between f and x
• Importance level of x in tree

Distance I 3 A 2 a 3 i
4 ii 4 b 1 i 2
ii 0 B 4 a 5 i 6
ii 6 b 5 i 6 ii 6
Importance I 0 A -1 a -2
i -3 ii -3 b -2 i
-3 ii -3 B -1 a -2
i -3 ii -3 b -2 i
-3 ii -3
DOI I -3 A -3 a -5 i
-7 ii -7 b -3 i -5
ii -3 B -5 a -7 i
-9 ii -9 b -7 i -9
ii -9
f
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Assignment

• Read for Thurs
• Wills, NicheWorks, web
• Denzil, Aarthi
• Read for Tues
• Korn, Multi-Digraphs, web
• Shumei, Yuying
• Homework 3 Tues Mar 20