Result of the unsupervised fuzzy partition (UFP) clustering algorithm applied to the PCA-reduced whole sample: the upper panel represents the PC1-PC2 plane, while the lower panel represents the PC1-PC3 plane. In red are early type galaxies, in blue late type galaxies, in green our intermediate objects. Brown lines are the interceptions on both planes of the 70% and 90% isoprobability surfaces. Black lines are the isodensity curves of the points in the planes, computed via Gaussian kernel smoothing.