Heatmap in 1873: History
Clip Heatmap from a paper and keep the axis sentence, not the colour. Year 1873, line “History,” figure 1873. Colour alone does not carry size. Toussaint Loua’s 1873 crime tables; later Toussaint/Bertin and 1990s gene arrays
In reports, ads and assignments it fits patterns across two categorical axes at once. Skip it when precise lookup of a number, or a rainbow that is not color-blind safe. This page gathers anatomy, fit, craft, failure modes and work / ads / school recipes for Heatmap. When the story is: patterns across two categorical axes at once.
Skip it in cases like: precise lookup of a number, or a rainbow that is not color-blind safe. color value of a cell in a row-column grid Yes if one claim is visible at a glance in Meta, Google and retail print; otherwise link to a full figure. Yes for lab reports and poster boards if axes, units and a source line are present.
Excel or Google Sheets or PowerPoint; export SVG/PDF. Do not rely on hue alone. Label directly and check greyscale. Heatmap: honour color value of a cell in a row-column grid, and switch when precise lookup of a number, or a rainbow that is not color-blind safe. The core mark of Heatmap is color value of a cell in a row-column grid.
Keep axis, unit, and year. If “History” is the axis, the figure is 1873 and the year is 1873.1873
Figures to keep
- Year of the chart
- 1873
- Axis figure
- 1873
- Chart
- Heatmap
- How to read it
- History