Heatmap (Calendar)
A calendar heatmap showing daily values over a year, similar to GitHub's contribution graph. Supply date-value pairs via JSON.
Template details
- chart
- heatmap
- calendar
- daily
- activity
- d3
When to use this template
A calendar heatmap excels at revealing daily patterns, trends, and anomalies in activity or intensity over an annual period. Analysts use it to quickly identify recurring cycles, periods of high or low engagement, and unusual daily events. It provides an intuitive visual summary of temporal distribution, aiding in resource planning or performance monitoring.
- Daily time-series data with a single numeric value per day.
- Datasets spanning at least one full year, ideally multiple years.
- Quantitative metrics representing frequency, volume, or intensity.
- Data where temporal patterns (daily, weekly, monthly) are significant.
- Datasets with consistent daily observations or explicit zero values.
- Values that can be mapped to a continuous color scale.