Browsing by Author "Turo, David"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Adapting Treemaps to Stock Portfolio Visualization(1998-10-15) Turo, David; Jungmeister, Walter-AlexanderTreemap 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. (Also cross-referenced as CAR-TR-648) (Also cross-referenced as SRC-TR-92-120)Item Improving the Visualization of Hierarchies with Treemaps: Design Issues and Experimentation(1998-10-15) Turo, David; Johnson, BrianControlled experiments with novice treemap users and real data highlight the strengths 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. (Also cross-referenced as CAR-TR-626) (Also cross-referenced as ISR-TR-92-62)Item Using Treemaps to visualize the Analytic Hierarchy Process(1998-10-15) Asahi, Toshiyuki; Turo, David; Shneiderman, BenTreemaps, 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 metaphorically as a pump and a hook, were developed and applied to the treemap to support AHP sensitivity analysis. Users can change the importance of criteria dynamically on the two-dimensional treemap and immediately see the impact on the outcome of the decision. This fluid process dramatically speeds up exploration and provides a better understanding of the relative impact of the component criteria. A usability study with 6 subjects using a prototype AHP application showed that treemap representation was acceptable from a visualization and data operation standpoint. (Also cross-referenced as ISR-TR-94-45) (Also cross-referenced as CAR-TR-719)