The Table Lens: Merging Graphical and Symbolic Representations in an Interactive Focus + Context Vis...
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The Table Lens: Merging Graphical and Symbolic Representations in an Interactive Focus + Context Visualization for Tabular Information. R. Rao and S. K. Card Present by Tao Zhan. Focus + Context (Fisheye). Motivation

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The Table Lens: Merging Graphical and Symbolic Representations in an Interactive Focus + Context Visualization for Tabular Information

R. Rao and S. K. Card

Present by Tao Zhan


Focus context fisheye
Focus + Context (Fisheye) Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Motivation

    • a view of the whole data available, while pursuing detail analysis of a part of it

    • Problems in overview + detail: visual search and working memory consequences degrade performance

    • user’s interest in detail fall away from the object of attention in a systematic way


Focus context continue
Focus + Context (Continue) Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Basic Idea

    • detail information and relevant context overview are combined within a single (dynamic) display

    • DOI: a metric that is the sum of a priori measure of importance and distance from the point of interest

    • method of reduction of information for the peripheral, contextual area


Focus context continue1
Focus + Context (Continue) Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Key factors

    • zoom factor

    • focus/context space ratio

    • whether the zoom factor is a step function or continuous function

    • whether the fisheye effect is obtained by geometrical distortion, elision, or semantic scaling


Table lens
Table Lens Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Motivated by the particular nature of tables

  • Distort table without bending any rows or columns

  • Distortion in each of the two dimensions is independent from the other

G

H

4

5

6


Distortion function framework
Distortion Function Framework Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Each dimension has a block pulse DOI

  • Mapping from uniformly distributed cell to physical location

  • Multiple focal areas and Multiple focal levels are possible


Interactive manipulation of focus
Interactive Manipulation of Focus Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Zoom

  • Adjust

  • Slide

  • Combined


Graphical mapping scheme
Graphical Mapping Scheme Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Value

  • Value Type

  • Region Type

  • Cell Size

  • User Choice

  • Spotlighting


Examples conclusion
Examples & Conclusion Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Examples

  • Strength and Advantage

    • supports effective interaction with much larger tables than conventional one (68,400 V.S. 660)

    • graphical representations make it easy to view patterns for cell value

    • Suitable for large dimensional data and reveal correlation and patterns between them


Critique
Critique Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Zoom Factor may be too big

  • Nominal variables with large domain are hard to present graphically

  • Search is not trivial in Table Lens


Favorite sentence
Favorite Sentence Representations in an Interactive Focus + Context Visualization for Tabular Information

  • Always take flight to where there is a free view over the whole single great problem, even if this view is still not a clear one.


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