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首页> 外文期刊>IEEE transactions on visualization and computer graphics >Visualizing Changes of Hierarchical Data using Treemaps
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Visualizing Changes of Hierarchical Data using Treemaps

机译:使用树图可视化分层数据的变化

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摘要

While the treemap is a popular method for visualizing hierarchical data, it is often difficult for users to track layout and attribute changes when the data evolve over time. When viewing the treemaps side by side or back and forth, there exist several problems that can prevent viewers from performing effective comparisons. Those problems include abrupt layout changes, a lack of prominent visual patterns to represent layouts, and a lack of direct contrast to highlight differences. In this paper, we present strategies to visualize changes of hierarchical data using treemaps. A new treemap layout algorithm is presented to reduce abrupt layout changes and produce consistent visual patterns. Techniques are proposed to effectively visualize the difference and contrast between two treemap snapshots in terms of the map items¡¯ colors, sizes, and positions. Experimental data show that our algorithm can achieve a good balance in maintaining a treemap¡¯s stability, continuity, readability, and average aspect ratio. A software tool is created to compare treemaps and generate the visualizations. User studies show that the users can better understand the changes in the hierarchy and layout, and more quickly notice the color and size differences using our method.
机译:虽然树形图是用于可视化分层数据的一种流行方法,但是当数据随时间变化时,用户通常很难跟踪布局和属性更改。并排或来回查看树图时,存在一些问题,可能会阻止查看者执行有效的比较。这些问题包括突然的布局更改,缺少突出的视觉图案来表示布局以及缺少直接的对比以突出显示差异。在本文中,我们提出了使用树图可视化分层数据变化的策略。提出了一种新的树图布局算法,以减少布局的突然变化并产生一致的视觉图案。提出了一些技术,可以根据地图项的颜色,大小和位置有效地可视化两个树状图快照之间的差异和对​​比度。实验数据表明,我们的算法在保持树形图的稳定性,连续性,可读性和平均长宽比方面可以达到良好的平衡。创建了一个软件工具来比较树图并生成可视化效果。用户研究表明,用户可以更好地了解层次结构和布局中的变化,并使用我们的方法更快地注意到颜色和大小的差异。

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