Heatmap - Custral Docs

A heatmap showing value density across rows and columns.

When to use

Heatmaps reveal patterns across two categorical dimensions: hour-of-day vs day-of-week, channel vs disposition, sales rep vs deal stage. Color intensity encodes the value at each intersection.

Required data shape

Rows: a categorical property.
Columns: a second categorical property.
Value (optional): numeric property aggregated per cell; defaults to count.

Configuration

Setting	What it does
Rows	The property whose values form the row axis.
Columns	The property whose values form the column axis.
Value	The numeric value aggregated per cell. Defaults to a record count.
Aggregation	How values roll up: Count, Sum, or Average.

Limitations

Best with bounded axes (24 hours, 7 days). Open-ended axes (record id) are not useful.
Color scale defaults to linear; for highly skewed data, switch to log.