Mercurial > repos > shellac > sam_consensus_v3
view env/lib/python3.9/site-packages/networkx/algorithms/smetric.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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import networkx as nx def s_metric(G, normalized=True): """Returns the s-metric of graph. The s-metric is defined as the sum of the products deg(u)*deg(v) for every edge (u,v) in G. If norm is provided construct the s-max graph and compute it's s_metric, and return the normalized s value Parameters ---------- G : graph The graph used to compute the s-metric. normalized : bool (optional) Normalize the value. Returns ------- s : float The s-metric of the graph. References ---------- .. [1] Lun Li, David Alderson, John C. Doyle, and Walter Willinger, Towards a Theory of Scale-Free Graphs: Definition, Properties, and Implications (Extended Version), 2005. https://arxiv.org/abs/cond-mat/0501169 """ if normalized: raise nx.NetworkXError("Normalization not implemented") # Gmax = li_smax_graph(list(G.degree().values())) # return s_metric(G,normalized=False)/s_metric(Gmax,normalized=False) # else: return float(sum([G.degree(u) * G.degree(v) for (u, v) in G.edges()]))