P3/P0–w plane for all 80 observed clusters including the wboundary at 10^-2 and both the simple (10^-7, black solid line) and the morphological P3/P0 boundaries (10^-8, 5 × 10^-7, dotted lines) in an r₅₀₀ aperture. The substructure parameters are background and bias-corrected. The outlier at w < 10^-4 can be considered as w = 0 and is excluded from the analysis. The different morphological types show a rough segregation with double (blue circles) and complex (green diamonds) with high structure parameters, while intermediate (red asterisks) and regular (black crosses) clusters are found to have very low structure values. In addition, we show the mean of the 4 populations and their spread (standard deviation).