(a) Plot of the estimated ρ_i using CCA on data segregated by Mount Wilson classes for i = 1, …, 9 within the sunspots α groups start out with the highest correlation. (b) Canonical patches a₁ (top) and b₁ (bottom) for the Mount Wilson classes within the sunspots. Again, the b₁s are approximately equal to the negative of the a₁s as in Figure 10 but the patches differ slightly from class to class.