Comparison of the disc (green with stripes) and outflow (red) component distributions for all the MAGNUM galaxies in terms of visual extinction A_V, density n_e, and log([S III]/[S II]) (top, middle, and bottom panel, respectively). The two distributions are normalised such that the integral over the range is 1. For each velocity bin, we take into account only the spaxels with a S/N >  5 for the emission lines involved. The light green and orange dotted lines represent the median of the disc and outflow distributions, respectively. The dashed lines in the central panel represent the median value weighted on the [S II] line flux. The top x-axis of the bottom panel translates the [S III]/[S II] ratio into log(U), following the relation provided by Díaz et al. (2000).