Figure 4

Hierarchical clustering analysis of the 51 formal concepts. The concepts shown on the left are represented according to the libraries they contain (shown on top). A red square indicates a library within a concept, a green square a library not within the corresponding concept. From the hierarchical clustering shown on the left, one concept appears to be very different from the rest (n° 153308), and a group of concept appears sufficiently similar to be grouped within a QSG.