矩形树图把值编码为层级嵌套矩形的面积。本·施奈德曼，马里兰大学，1991，磁盘空间可视化。
工作报告、广告与作业中适合叶子多且有层级的部分-整体。若需要精确比较相近大小时，换一种形式。
Parts
- 标记 — The core mark of 矩形树图 is 层级嵌套矩形的面积.
- 尺度 — The scale must show zero (or a declared break) and units.
- 轴 — Axis titles name the variable, not a mood.
- 图例 — A legend is weaker than a direct label. Write beside the mark when you can.
- 标签 — Numbers are optional. If comparison is the job, label the ends only.
- 网格 — Keep the grid faint. Data should own the ink.
- 注释 — One annotation sentence. Date the source.
- 外框 — A thin frame. Never a 3-D box.
Variants
- 矩形树 — Variant 1 of 矩形树图. Same encoding, different layout.
- 施奈德曼图 — Variant 2 of 矩形树图. Same encoding, different layout.
- 嵌套面积 — Variant 3 of 矩形树图. Same encoding, different layout.
- 矩形树图 4 — Variant 4 of 矩形树图. Same encoding, different layout.
Labels
- 轴 — On 矩形树图, make Mark readable.
- 图例 — On 矩形树图, make Scale readable.
- 标签 — On 矩形树图, make Axis readable.
- 网格 — On 矩形树图, make Legend readable.
- 注释 — On 矩形树图, make Label readable.
矩形树图: honour 层级嵌套矩形的面积, and switch when 需要精确比较相近大小时.