1. Data Visualization with graphviz
Thomas Kenny
10/31/2011

3. www2.research.att.com/~north/projects_software/img/ATT_Labs_InternetMap_0730_10.pdf

4. Problem - Solution
• “Big data” are datasets that grow so large that
they become awkward to work with using on-
hand database management tools.
- Wikipedia.org
• graphviz is open source software developed
by AT&T Labs which aids analysis of “big data”
through visualization.

5. http://graphviz.org

8. A Little Graph Theory Lesson
• Nodes (aka vertices) – are the fundamental
unit out of which graphs are formed
• Edges (directional arcs) – is a line connecting
two nodes
• Graph – is a collection of nodes and edges

10. Let’s Play 6 Degrees of Kevin Bacon!
http://public.research.att.com/~volinsky/cgi-bin/prox/help.pl

11. digraph a {
graph [bb="0,0,1000,1000" splines=true];
"Kevin Bacon" [color=red, style=filled, fillcolor=red, fontcolor=yellow, label=<Kevin Bacon<BR/>4030(0%) 0>];
"John Travolta" [color=red, style=filled, fillcolor=red, fontcolor=yellow, label=<John Travolta<BR/>4902(0%) >];
"Kyra Sedgwick" [ label=<Kyra Sedgwick<BR/>2041(1%) 1>];
"Benjamin Bratt (I)" [ label=<Benjamin Bratt (I)<BR/>1851(0%) 1>];
"Tait Ruppert" [ label=<Tait Ruppert<BR/>332(2%) 1>];
"Greg Grunberg" [ label=<Greg Grunberg<BR/>1118(1%) 2>];
"Eric Armstrong (I)" [ label=<Eric Armstrong (I)<BR/>228(2%) 2>];
"Walter Breaux" [ label=<Walter Breaux<BR/>439(0%) 1>];
"Kyra Sedgwick" -> "Kevin Bacon" [ label="7.0" fontcolor=brown color="#3696a2" style="setlinewidth(1)"];
"Benjamin Bratt (I)" -> "Kevin Bacon" [ label="4.0" fontcolor=brown color="#7fcdbb" style="setlinewidth(1)"];
"Tait Ruppert" -> "Kevin Bacon" [ label="1.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"Greg Grunberg" -> "Kevin Bacon" [ label="3.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"Eric Armstrong (I)" -> "Kevin Bacon" [ label="2.0" fontcolor=brown color="#7fcdbb" style="setlinewidth(1)"];
"Walter Breaux" -> "Kevin Bacon" [ label="1.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"John Travolta" -> "Kyra Sedgwick" [ label="2.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"John Travolta" -> "Benjamin Bratt (I)" [ label="3.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"John Travolta" -> "Tait Ruppert" [ label="6.0" fontcolor=brown color="#1c276f" style="setlinewidth(1)"];
"John Travolta" -> "Greg Grunberg" [ label="2.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"John Travolta" -> "Eric Armstrong (I)" [ label="1.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"John Travolta" -> "Walter Breaux" [ label="1.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"Kyra Sedgwick" -> "Benjamin Bratt (I)" [ label="2.0" fontcolor=brown color="#bfbf99" style="setlinewidth(1)"];
"Greg Grunberg" -> "Eric Armstrong (I)" [ label="1.0" fontcolor=brown color="#7fcdbb" style="setlinewidth(1)"];
}

12. Node Syntax
"Kevin Bacon“
[
color=red,
style=filled,
fillcolor=red,
fontcolor=yellow,
label=<Kevin Bacon<BR/>4030(0%) 0>
];

13. Edge Syntax
"Kyra Sedgwick" -> "Kevin Bacon“
[
label="7.0“
fontcolor=brown
color="#3696a2“
style="setlinewidth(1)“
];
More attributes @ graphviz.org/content/attrs

14. http://inmaps.linkedinlabs.com/network

17. Beyond graphviz
• gephi.org (also open source)
– Data visualization over time
– WYSIWYG controls for layout style, node/edge
size, borders, colors, labels, etc
– Group nodes by data points
– Community-detection
– Reduction to filter out the noise
• http://www.ted.com/talks/hans_rosling_show
s_the_best_stats_you_ve_ever_seen.html
Most dramatic part is from 03:15 to 05:06