Browsing by Author "Turo, D."
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Item Adapting Treemaps to Stock Portfolio Visualization(1992) Jungmeister, Walter-Alexander; Turo, D.; ISRTreemap visualization techniques are extended and applied to stock market portfolios via a prototype application. Designed to facilitate financial decision-making, the prototype provides an overview of large amounts of hierarchical financial data and allows users to alter aspects of the visual display dynamically. Treemap concepts are illustrated via examples which address common portfolio management needs.Item Improving the Visualization of Hierarchies with Treemaps: Design Issues and Experimentation(1992) Turo, D.; Johnson, Brian; ISRControlled experiments with novice treemap users and real data highlight the strength of treemaps and provide direction for improvement. Issues discussed include experimental results, layout algorithms, nesting offsets, labeling, animation and small multiple displays. Treemaps prove to be a potent tool for hierarchy display. The principles discussed are applicable to many information visualization situations.Item Using Treemaps to Visualize the Analytic Hierarchy Process(1994) Asahi, Toshiyuki; Turo, D.; Shneiderman, B.; ISRTreemaps, a visualization method for large hierarchical data spaces, are used to augment the capabilities of the Analytic Hierarchy Process (AHP) for decision-making. Two direct manipulation tools, presented metamorphically as a "pump" and a "hook", were developed and applied to the treemap to support AHP sensitivity analysis. A usability study was conducted using a prototype AHP application; results showed that treemap representation of decision-support tools was acceptable for AHP users from both a visualization and data operation standpoint. Subjective preferences were high for AHP treemaps.