Most probable (highest similarity) class among the three principal activity classes (top) and predictions based on the DONHa classification scheme (bottom) for the subsample of composite galaxies. The bars in both histograms are color-coded based on the principal class that each galaxy is predicted to resemble most (see Sect. 5.2 for for inconclusive classifications). Labels: SF (star-forming), SB (starburst), AGN (active galactic nucleus), Pas (passive).