Fig. 4

K-means cascade plot showing the group attributed to each object for each partition. The plot shows the group attributed to each object for each partition (rows of the graph). The rows of the graph are the different values of k. The groups are represented by different colours; there are three colours for k = 3, four colours for k = 4, and so on. Another graph shows the values of of the criterion ( calinski) for determining the best partition