Figure 11: Correlations between the disc parameters for a sample of lenticulars and early-type spirals. Correlation between the Hubble type and disc scale length (a) and the central surface brightness (b). Correlations between the disc scale length and the absolute magnitude of the disc (c) and the central surface brightness (d). The full line represents the best linear fit (). The Pearson correlation coefficient () is also indicated. See  for more details.