热力图把值编码为行列网格中单元格的色值。卢阿 1873 年犯罪表；后来是贝尔坦与 1990 年代基因芯片。
工作报告、广告与作业中适合同时看两个分类轴上的模式。若精确读数，或不对色盲友好的彩虹，换一种形式。
Parts
- 标记 — The core mark of 热力图 is 行列网格中单元格的色值.
- 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
- 矩阵着色 — Variant 1 of 热力图. Same encoding, different layout.
- 分级设色近亲 — Variant 2 of 热力图. Same encoding, different layout.
- 强度网格 — Variant 3 of 热力图. Same encoding, different layout.
- 热力图 4 — Variant 4 of 热力图. Same encoding, different layout.
Labels
- 轴 — On 热力图, make Mark readable.
- 图例 — On 热力图, make Scale readable.
- 标签 — On 热力图, make Axis readable.
- 网格 — On 热力图, make Legend readable.
- 注释 — On 热力图, make Label readable.
热力图: honour 行列网格中单元格的色值, and switch when 精确读数，或不对色盲友好的彩虹.