VectorLens: Angular Selection of Curves within 2D Dense Visualizations


We investigate the selection of curves at intervals a 2D visualization by specifying their angle or slope. Such angular selection has applications in parallel coordinates, time series visualizations, spatio-temporal movement knowledge, etc. Our interaction technique specifies a vicinity of interest in the visualization (with a grip and diameter), a direction, and an angular tolerance, all with a single drag. We experimentally compared this angular choice technique with alternative techniques for choosing curves, and found that angular choice resulted in an exceedingly higher range of trials that were successful on the primary try and fewer incorrectly selected curves, and was also subjectively preferred by participants. We tend to then gift the planning of a popup lens widget, known as the VectorLens, that allows for straightforward angular choice and conjointly permits the user to perform extra filtering operations based mostly on sort of curve. Multiple VectorLens widgets can conjointly be instantiated to mix the results of their filtering operations with boolean operators.

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