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concludes that present tools do not support savvy
users—users with basic programming skills and do-
main knowledge—in constructing advanced visual-
izations, although their role is crucial. They need dif-
ferent visualization tools to construct advanced visu-
alizations. This study can serve as a brief introduction
to newcomers in the InfoVis area. For a deeper un-
derstanding, we encourage them to refer to the refer-
ences mentioned in this paper. Moving the boundary
of constructing advanced visualizations from expert
users towards savvy users is a research area that re-
quires more the attention of the InfoVis community.
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