A time series is a set of data points collected at regular intervals of time. Sometimes, the data points in a time series change over time in a predictable way. This is called a stationary time series. Other times, the data points change in an unpredictable way. This is called a non-stationary time series.

Post: https://www.spsanderson.com/steveondata/posts/rtip-2023-01-23/

#timeseries #timeseriesanalysis #stationarity #dataanalytics #adf #phillipsperron #r #lists #lapply #data