(Life)Time Series Analysis

A periodogram estimates the frequency spectrum of a time series. It’s a decomposition of the signal into its single frequency components. An overview of the rate of recurring events and their power. Weekends bring joy. Ends of month bring money. Mornings bring mourning. Sometimes delight. Seasons introduce change. Adventures approach with holidays. Family reunions come every second year. Resolutions once a year.

Adventure time has just passed and the 1 year frequency approaches with all its power. There was a time long ago on an island far away where I understood what is going on in this formula. Right now, I have no idea. Maybe it’s time to start revisiting long forgotten knowledge. Maybe with some fixed frequency. Maybe, at least, with undetermined infrequency.