The top plot shows number of listings by month, the middle plot is the 6 month smoothed average trend, and the bottom plot is the seasonal component.
Couple quick takeaways:
- Inventory has decreased tremendously since 2010.
- The seasonal component suggests inventory is highest in the late summer/fall and drops sharply towards new years.
- Shiny is very easy to learn; I had the app up and running in a couple hours.