Confusion matrices for Method-1 (top left), Method-2 (top right), Method-3 (bottom left), and Method-4 (bottom right) for the multi-class classification task on TNG. The data from all four redshift bins are combined. The post-merger class includes the ongoing-mergers. The confusion matrices are normalised vertically, and therefore the diagonal elements represent the precision of each class. The recall of each class is shown in brackets.