Question: Can we interpret these biplots in order of quadrants? As in is it true that those eigenvectors in the lower-right side matter/cause more variance than those in the upper-left side? Or does that depend on the size of the eigenvectors? So, if I have a small sized eigenvector in the lower-right quadrant (positive for PC1 but negative for PC2) would it still be more significant in terms of the variance it is causing than a larger sized eigenvector on the upper-left (positive PC2 but negative PC1) quadrant?