gganimate

Robust Estimation OLS is not robust to outliers. It is computed by minimizing the sum of squares of the residuals and each outlying observation has a large residual and consequently a large effect on this sum of squares. On the other hand, The M-estimators used in robust statistics (Heritier et al. 2009; Huber 1964; Maronna, Martin, and Yohai 2006) are not influenced by outlying data. Huber (1964) proposed to minimize functions which are less influenced by outliers rather than the sum of squares.

The Galton board The Galton Board is the famous device that simulates central limit theorem. Here is an animation using the gganimate package of this device. Here is the script to reproduce the example.