Fig. 2From: Hierarchical community detection via rank-2 symmetric nonnegative matrix factorizationRuntime for SpMM, opt-act, and other algorithmic steps (indicated as “misc”) in the HierSymNMF2 algorithm. The experiments were performed on the DBLP06 dataset. The plots show the runtime for generating various numbers of leaf nodes. Upper timing results for the Matlab program; lower timing results for the C/Matlab hybrid programBack to article page