Figure 5.

Analysis 2: bilateral object symmetry (C_1v). Principal components describing the patterns of pyramid symmetric variation, bilateral FA, and measurement error. Legend as in Fig. 3. Note that for the measurement error panels, the symmetry or asymmetry of the residual vectors with respect to the plane of symmetry depend on the way the symmetric and asymmetric components of the total error variation are distributed along principal components. Here PC1 captures a part of the symmetric variation while PC2 captures an asymmetric part.