Illustration of the 3rd-order tensor representation of a collection of networks. A collection of co-splicing networks can be "stacked" into a third-order tensor such that each slice represents the adjacency matrix of one network. The weights of edges in the co-splicing networks and their corresponding entries in the tensor are color-coded according to the scale to the right of the figure. After reordering the tensor by the exon and network membership vectors, a frequent co-splicing cluster (colored in red) emerges in the top-left corner. It is composed of exons A, B, C, D which are heavily interconnected in networks 1, 2, 3.