Figure 2
From: Song lyrics have become simpler and more repetitive over the last five decades
Evolution over time for the descriptors repeated line ratio and ratio chorus to sections for each genre. The linear regression lines (in red) show the evolution of descriptor values over time for each descriptor and genre (Huber’s M robust regression models are trained individually for each descriptor and genre combination). Blue colors denote the density of data points in a given region. R\(^2\) and p-values are provided in the yellow boxes.
