WebToolArcHow to read this chart
A heatmap encodes a rectangular numeric matrix through color intensity.
Before publishing
Review missing cells, inconsistent row widths and zero-contrast matrices before relying on color as evidence.
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Chart Tools
Heatmap Maker
Paste a labeled value matrix, render a color-intensity heatmap, and export the result locally.
ReadyColor intensity is scaled between the smallest and largest value in the pasted matrix.
Data readiness & publication review
Reviewing…Check the data before you export
Review the source structure, chart-specific interpretation risks and a copyable accessible summary. The chart itself remains the primary workspace above.
Findings
Accessible chart summary
Reviewing the current data…
This review checks structure and common interpretation risks; it does not prove that the source data, measurement method, denominator, units or conclusion are valid.
Core data-to-chart workflows
Start with Graph Maker or CSV Chart Maker, then use a focused chart type when the visual question changes. Keep source data and export evidence connected instead of treating a rendered picture as the only record.
Graph MakerGeneral pasted-data chart workspaceLine Graph MakerOrdered change and multi-series trendsBar Graph MakerCategory comparison and sortingPie Chart MakerParts of one meaningful totalScatter Plot MakerX/Y relationships and trendlineGantt Chart MakerTask schedules across datesRadar Chart MakerMulti-axis profile comparisonCSV Chart MakerCSV/TSV import and chart switching
Plan the color scale before export
Heatmap colors should reflect an explicit numeric scale instead of silently stretching every dataset from its own minimum to maximum. Inspect sequential or diverging bins, midpoint placement and clipping against the matrix already pasted above.
—Observed range
—Color scale
—Clipped cells
—Midpoint position
Ready.
| Bin | Numeric range | Cells | Share |
|---|
A diverging scale is useful only when the midpoint has meaning, such as zero, a target, or a baseline. Do not use a midpoint only for visual symmetry.