Visualize variables’ auto-correlation.
Visualize time series’ periodicity in a spiral heatmap.
- Unit of the vertical axis. Options are: years, months, or days (as present in the series), months of year, days of week, days of month, days of year, weeks of year, weeks of month, hours of day, minutes of hour.
- Unit of the radial axis (options are the same as for (1)).
- Aggregation function. The series is aggregated on intervals selected in (1) and (2).
- Select the series to include.
The image above shows traffic for select French highways. We see a strong seasonal pattern (high summer) and somewhat of an anomaly on July 1992. In this month, there was an important trucker strike in protest of the new road laws.