Interaction in Visualization Systems CPSC 533C Presentation Zhangbo Liu (Zephyr) December 7, 2005

Question to this topic: What & Why?

Interaction “Interaction involves the transformations that map the data to visual form.” More than just controls? Integrates controls into the visualization. Allows for direct manipulations of the graphical representation of the data.

Examples Ahlberg & Shneideman, The Film Finder Chuah et al., SDM Ware, Chapter10, Information Visualization Munzner,H3

Papers High interaction graphics. Stephen G. Eick and Graham J. Wills. European Journal of Operational Research, 81: , High interaction graphics Interactive Visualization of Genealogical Graphs. Michael J. McGuffin and Ravin Balakrishnan. Proc. InfoVis Interactive Visualization of Genealogical Graphs

Papers High interaction graphics. Stephen G. Eick and Graham J. Wills. European Journal of Operational Research, 81: , Interactive Visualization of Genealogical Graphs. Michael J. McGuffin and Ravin Balakrishnan. Proc. InfoVis Interactive Visualization of Genealogical Graphs

High Interaction Graphics Clarity Information only on demand, cleaner & more focused displays, allow a range of options Robustness Avoid drawing inferences from only one view Power Combine views, leverage exploration Possibility 3+ dimensional data, animation

Principles Simple, easy to interpret views Information Hiding Direct Manipulation Linking & Brushing

Linking and Brushing Linking Visually showing which parts of one data plot correspond to that of another. Brushing Allowing the users to move a region (brush) around the data display to highlight points which fall within this region.

Slide adapted from Marti Hearst Examples Districts of the city of Dublin showing areas with high levels of average income Linking altitude to grass and grain types in Scottish Districts

Critique Pros: Very good survey paper for introduction, general techniques. Easy to read. Seems like the beginning of a book. Cons: Examples were somewhat simple, despite mentioning some complex application domains. Dated. Open issues are easy nowadays.

Papers High interaction graphics. Stephen G. Eick and Graham J. Wills. European Journal of Operational Research, 81: , High interaction graphics Interactive Visualization of Genealogical Graphs. Michael J. McGuffin and Ravin Balakrishnan. Proc. InfoVis 2005.

Problem Family trees are difficult to draw

Proposed solution Dual-tree based representation

Novel Interaction Technique

Video

User Study 1 practicing genealogist 1 hour session Neural feedbacks, no pros or cons

Critique Pros: A nice solution for a generally misunderstood graph drawing problem Cool interaction technique for collapsing or expanding subtrees Cons: Requires some background in genealogy Poor user study