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Treemaps are an effective tool for visualizing data sets and are commonly used to display hierarchical data. Treemaps were first designed by Ben Shneiderman at the University of Maryland. For more information and the history of treemaps see:

Tyler (2007-03-19 16:57)

They're basically a way to graph trees/hierarchical data (analogous to bar graphs for tabular data). A rectangle is divided up into smaller rectangles whose size is a measure of weight. Those smaller rectangles are divided up into still smaller rectangles. Can be used to visually express such ideas such as "Of the 1340 nodes contained under category C (or any of its subcategories), 30% of them are in subcategory C/A and 70% are in C/B...

Data visualization  edit   (Category  edit)

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