Confusion matrices for Method-1 (top left panel), Method-2 (top right panel), Method-3 (bottom left panel), and Method-4 (bottom right panel) for the four-class classification task on TNG. The four classes are non-merger, pre-merger, ongoing-merger, and post-merger (the different classes determined by the merger trees in the simulation). The data from all four redshift bins are combined. The confusion matrices are normalised vertically; therefore, the diagonal represents the precision of each class. The recall is shown in brackets.