Figure 3

Box plots of the cluster size distributions for six automatically generated partitions with 94 clusters and the SCOP partition of the C class. Each partition is associated with a box plot. A box plot summarizes the following statistics: median (line within the box), upper and lower quartiles (the upper and lower hinge of the box respectively), minimum and maximum data values (the ends of the vertical dash lines), and outliers (circles). For comparison, a "random" partition would have cluster size following approximately a Poisson distribution with intensity parameter equal to M/94 ~ = 14 domains per cluster. The partitions are labelled as explained in Figure 2. The SCOP partition and Random partitions are identified. All distributions necessarily have the same mean value, M/94, but show differing medians, interquartile ranges, tail lengths and maximal values. Both the SCOP and Random distributions show minimum values substantially above the automated partitions. The horizontal red dash line indicates the median value of SCOP fold partition.