DPCfam: Unsupervised protein family classification by Density Peak Clustering of large sequence datasets
Fig 2
Schematic representation of the primary clusters’ distance matrix organised into blocks.
The cluster list is first split into N groups of equal size and then the distance matrix is divided into N2 blocks with each block containing distances between clusters in two groups. Since the matrix is symmetric, we can consider a single block for each pair of groups. Blue blocks represent off-diagonal blocks, green blocks represent diagonal blocks.