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In SAGE the user supplies information to be visualized plus how the information should be characterized. The resulting graphic will be composed of specific graphical primitives (e.g., interval bars or lines). SAGE then creates a graphic visualization of the information.
SAGE enhances user-directed design by providing tools that:
- create user-specified displays,
- complete partially displayed specifications,
- retrieve previously created graphics based on appearance and/or data
content, and - design completely autonomous graphics.
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Sample visualizations illustrate the wide range of graphics that SAGE can generate. |
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We have integrated two tools into SAGE which play mutually supportive roles in design (Roth et al., 1994). SageBrush
(also called Brush) is an interface tool for directly manipulating graphics
by constructing sketches from a palette of primitive graphical elements
(see the Sage Graphics Model.). When users only partially specify a graphic, SAGE completes
it automatically. This eliminates the need for users to perform low-level
repetitive actions such as assigning data attributes to elements of the
sketch, or selecting specific graphical properties once objects are specified.
SageBook (also called Book) is an interface
that enables users to browse and retrieve previously created pictures, reusing
them for new data visualizations (Chuah et al., 1995). This approach allows
users to use previous visualizations as a starting point for designing new
displays of data, extending and customizing as needed. Found visualizations
can be modified by using Brush before sending it to SAGE.
