Table 1 Comparisons of the three G-matrices using random skewers and hierarchical analyses (see also Table S3, S4). The random skewers section reports the mean correlation among response vectors of two G-matrices subject to the same set of 10,000 random selection vectors. The hierarchical analysis reports the P-values to reject the hypotheses of equality, proportionality, or common principal components (CPC) in favor of unrelated matrices. The P-values are obtained by randomization (see Methods)