Database Reference
In-Depth Information
need to be computed between a node and a region if it is sufficiently farther away in
the tree. Zooming and focus+context are popular techniques to make visualizations
more useful. A review of the different uses of the techniques can be found in [
1
].
Additional information in Kernel Density Estimation can be found in [
6
]. The choice
of a color scheme is crucial for the interpretation of the task. To represent the
importance of the nodes in the network and density of the Tweets in heatmaps,
we use a 7-class sequential color scheme from ColorBrewer 2©.
2
Guidelines for
choosing the right color scheme can be found in [
5
]. The layout of the word clouds
to visualize text is based on the popular Wordle system by Jonathan Feinberg [
2
].
References
1. Andy Cockburn, Amy Karlson, and Benjamin B Bederson. A Review of Overview+Detail,
Zooming, and Focus+Context Interfaces.
ACM Computing Surveys (CSUR)
, 41(1):2, 2008.
2. Jonathan Feinberg. Wordle.
Beautiful Visualization
, pages 37-58, 2010.
3. Thomas MJ Fruchterman and Edward M Reingold. Graph Drawing by Force-Directed Place-
ment.
Software: Practice and experience
, 21(11):1129-1164, 1991.
4. Ben Shneiderman. The Eyes Have It: A Task By Data Type Taxonomy for Information
Visualizations. In
Visual Languages, 1996. Proceedings., IEEE Symposium on
, pages 336-343.
IEEE, 1996.
5. Julie Steele and Noah Iliinsky.
Beautiful Visualization
. O'Reilly Media, 2010.
6. Tan Pang-Ning, Michael Steinbach, and Vipin Kumar.
Introduction to Data Mining
. Pearson
Education, 2007.