Bicluster building. This figure shows how three simple biclusters (B1, B2, B3) are represented. Observe that g1 is in the three biclusters, and that c1 and g4 are in two of them. a) The method generates an internal edge structure by building complete graphs for each subset of nodes corresponding to a bicluster. This structure places close nodes in the same biclusters when the force layout is applied, moving g1 to the center of the three biclusters, since it is shared by all of them. A similar behavior occurs with c1 and g4, shared each one by two different biclusters. b) When displayed, edges are omitted and instead hulls with limits defined by splines surrounding the outermost nodes of each bicluster are drawn. Hulls are transparent, so their overlap forms solider colors, highlighting g1 more than c1 and g4, and these ones more than the rest.