2-dimensional representation of ( ϕP, ϕA). 2-dimensional representation of (ϕP, ϕA) using (a) CCA, (b) RCCA, (c) SRCCA
, (d) SRCCA
and (e) SRCCA
where the X and Y axes are the two most significant embedding components produced by the 3 different algorithms. CCA (a) suffers from lack of regularization, RCCA (b) is regularized but does not produce the best metaspace while the three variations of SRCCA (c)(d)(e) result in the best embedding components in terms of classification accuracy distinguished via best fit ellipses with one outlier.