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Issue No.06 - November/December (2010 vol.16)
pp: 1182-1189
Bongshin Lee , Microsoft Research
Nathalie Henry Riche , Microsoft Research
Amy K. Karlson , Microsoft Research
Sheelash Carpendale , University of Calgary
ABSTRACT
Tag clouds have proliferated over the web over the last decade. They provide a visual summary of a collection of texts by visually depicting the tag frequency by font size. In use, tag clouds can evolve as the associated data source changes over time. Interesting discussions around tag clouds often include a series of tag clouds and consider how they evolve over time. However, since tag clouds do not explicitly represent trends or support comparisons, the cognitive demands placed on the person for perceiving trends in multiple tag clouds are high. In this paper, we introduce SparkClouds, which integrate sparklines [23] into a tag cloud to convey trends between multiple tag clouds. We present results from a controlled study that compares SparkClouds with two traditional trend visualizations—multiple line graphs and stacked bar charts—as well as Parallel Tag Clouds [4]. Results show that SparkClouds ability to show trends compares favourably to the alternative visualizations.
INDEX TERMS
Tag clouds, trend visualization, multiple line graphs, stacked bar charts, evaluation
CITATION
Bongshin Lee, Nathalie Henry Riche, Amy K. Karlson, Sheelash Carpendale, "SparkClouds: Visualizing Trends in Tag Clouds", IEEE Transactions on Visualization & Computer Graphics, vol.16, no. 6, pp. 1182-1189, November/December 2010, doi:10.1109/TVCG.2010.194
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