Variation in R² (left) and RMSE (right) for different numbers of trees and maximum depths (MDs). The number of trees varies (1, 5, 10, 20, 30, 50, and 100), while the MDs we consider are 1 (dashed black line with circles), 3 (dashed blue line with circles), 5 (dashed green line with circles), 10 (dashed red line with circles), 20 (dashed magenta line with circles), 40 (solid purple lines with pentagon markers), and ‘Max’ (solid black lines with pentagon markers). The statistics are averaged over all six parameters that we consider. Note that these runs assume S/N = 10, and the simulated templates are at z = 0.3.