In his 1927 paper On a Method of Investigating Periodicities in Disturbed Series, with Special Reference to Wolfer's Sunspot Numbers, Udny Yule considers a thought experiment where there is a simple pendulum hanging from a fixed point and whose natural path is disturbed by pea shots from children; the example motivates the first use of the autoregressive model for time series analysis.
Is there a data set (with real data) available that will illustrate this pendulum example?