Heatmap

heatmap Pirate Activity by Sea Region
columns Jan, Feb, Mar, Apr, May, Jun

Caribbean: 5, 4, 5, 3, 4, 5
Atlantic: 2, 3, 2, 4, 3, 2
Mediterranean: 3, 2, 1, 2, 3, 4
Indian Ocean: 4, 5, 4, 5, 4, 3
South China Sea: 1, 2, 3, 2, 1, 2
West Africa: 3, 3, 4, 3, 5, 4

Syntax

heatmap Chart Title
columns Col1, Col2, Col3

Row Label: value1, value2, value3

Metadata Keys

Key	Description	Required
`chart`	Must be `heatmap`	Yes
`title`	Chart title displayed above the chart	No
`columns`	Comma-separated column header labels	Yes

Data Format

Each data line defines a row with comma-separated values matching the column count:

Caribbean: 5, 4, 5, 3, 4, 5
Atlantic: 2, 3, 2, 4, 3, 2

The row label becomes the Y axis label. Cell colors are scaled automatically based on value range.